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Fecha

Junio 18, 2024 a las 10:33 PM EDT

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Fecha

Junio 18, 2024 a las 10:37 PM EDT

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Autor

sarahhubert

Fecha

Junio 19, 2024 a las 07:19 PM CDT

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Autor

sarahhubert

Fecha

Junio 19, 2024 a las 05:31 PM CDT

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sarahhubert

Fecha

Junio 19, 2024 a las 05:17 PM CDT

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sarahhubert

Fecha

Junio 19, 2024 a las 04:42 PM CDT

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Autor

plingfactory

Fecha

Noviembre 12, 2011 a las 08:58 PM CET

Descripción

hymenostomatid ciliate with characteristic "Lieberkuensches Organell". See more details here:
http://www.plingfactory.de/Science/Atlas/KennkartenProtista/01e-protista/e-Ciliata/e-source/Ophryoglena2.html

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Papamoscas Viajero (Myiarchus crinitus)

Autor

mnold1

Fecha

Junio 2024

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Autor

sarahhubert

Fecha

Junio 15, 2024 a las 12:39 PM CDT

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eontlichens

Fecha

Junio 2024

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Autor

ikhom

Fecha

Junio 8, 2024 a las 04:40 PM EDT

Descripción

On the ground under Oak and Maple. Apothecia 5.5mm in diameter. Probably my largest specimens.

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Playero Vagabundo (Tringa incana)

Autor

emilita

Fecha

Junio 9, 2024 a las 06:29 PM MDT

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Autor

mtjones

Fecha

Mayo 2024

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Autor

peptolab

Fecha

Junio 5, 2024 a las 10:27 AM EDT

Descripción

Colpoda cucullus O.F. Muller, 1773 from algae-infused water wrung from fallen leaves that spent the winter submerged on my swimming pool cover. Imaged in Nomarski DIC on Olympus BH2S using SPLANAPO 40 0.95 objective and SPLAN 100 1.25 oil objective with slide oiled to the condenser. The cells measure from 80-100 um in length. We can clearly see the two most important characters which differentiate C. cuculus from other species in the genus: the stellate endosome of the spherical macronucleus and the anterior keel with 9-10 indentations.

" 40-110 um long; anterior keel with 8 to10 indentations; 29-34 ciliary grooves; cilia mostly paired; macro nucleus with a stellate endosome; trichocysts rod-form; usually with abundant food vacuoles; in fresh water with decaying plants" (1).

"Body distinctly reniform in shape, dorso-ventrally flattened. Right body edge strongly convex, left body edge concave often appearing as through a bite had been taken from it. A shallow diagonal somatic groove (not easily visible) originating on the dorsal surface travels round left side to entrance of vestibulum on the flattened ventral surface. Ciliation uniform in longitudinal or oblique orientated grooves. Several notches which denote ciliary grooves often visible on preoral part of left body edge. Caudal cilia may be present on some species. There is a horse-shoe shaped arc of closely-set cilia on the right of the vestibular entrance. Single rounded macronucleus with 1, 2 or 3 micronuclei. Single terminal contractile vacuole. Division takes place in thin-walled cysts, thick-walled protective cysts also formed" (2).

"Morphology Length 40-120 um, average about 80 um; broadly reniform, anterior keel with 8-10 indentations; uniform ciliation; buccal cavity with a deep oral funnel starting at a groove near the left side of the body, the buccal cavity leads to a diagonal groove on the dorsal surface (not evident in the figure), buccal cavity ciliated but without membranes or membranelles; 1 spherical macronucleus, exhibiting a stellate endosome; 1 micronucleus; a single terminal contractile vacuole; in the presence of a good food supply, the body is packed with food inclusions and appears very dark; fission only takes place within reproductive cysts" (3).

" Colpoda cucullus, previously considered a "soil" protozoan, is predominantly a vegetation-associated species that is especially adapted, through its ability to encyst and excyst rapidly, to exploit the fluctuating moisture content of the terrestrial environment. Three means of distribution were discovered which explain the ubiquity of this species. Herbivores consume Colpoda cysts while feeding on infested vegetation and deposit them with their feces; the cysts are transported by honey-bees along with pollen grains; and they are also carried through air like pollen. Dew induces excystment and contains sufficient nutritional substances to support profuse growth and reproduction" (4).

  1. PROTOZOOLOGY By RICHARD R. KUDO. CHARLES C THOMAS • PUBLISHER Springfield, Illinois. 1954. pp 745-6.
  2. Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982
  3. CILIATED PROTOZOA. An illustrated guide to the species used as biological indicators in freshwater biology HARTMUT BICK. WORLD HEALTH ORGANIZATION GENEVA 1972 pp 64-5.
  4. Colpoda cucullus: A Terrestrial Aquatic.Jo Anne Mueller, Wayne P. Mueller. The American Midland N

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Autor

iaincrowell

Fecha

Junio 7, 2024 a las 02:25 PM EDT

Descripción

@davidfbird check this out. The cyanomorph (Dendriscocaulon) which has been there for years finally has Ricasolia (the green algae morph) lobules growing from it! Troy was pumped.

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Autor

ziggypop74

Fecha

Junio 5, 2024 a las 11:50 PM EDT

Descripción

Inventaire sur la Ferme Expérimentale de Frelighsburg avec Annie-Eve Gagnon.

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Autor

ziggypop74

Fecha

Junio 5, 2024 a las 11:39 PM EDT

Descripción

Inventaire sur la Ferme Expérimentale de Frelighsburg avec Annie-Eve Gagnon.

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Qué

Grulla Blanca (Grus americana)

Autor

emilita

Fecha

Junio 2024

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Fecha

Junio 3, 2024 a las 06:38 PM IST

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Fecha

Mayo 17, 2024 a las 04:14 PM EDT

Descripción

Looking for information on the epiphytic organism attached to the zooplankton here

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Autor

lmkamstra

Fecha

Junio 2, 2024 a las 01:08 PM EDT

Descripción

In a fen on conifer

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Qué

Insectos Escama (Superfamilia Coccoidea)

Autor

upupa-epops

Fecha

Febrero 19, 2024 a las 10:51 AM EST

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Fecha

Junio 2, 2024 a las 12:09 PM IST

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Qué

Líquenes (Clase Lecanoromycetes)

Autor

upupa-epops

Fecha

Febrero 24, 2024 a las 03:52 PM EST

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Qué

Pipa de Indio (Monotropa uniflora)

Fecha

Junio 2, 2024 a las 02:02 PM EDT

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Fecha

Junio 1, 2024 a las 01:35 PM CEST

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Qué

Papamoscas Boreal (Contopus cooperi)

Autor

eontlichens

Fecha

Mayo 31, 2024 a las 07:55 AM EDT

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Autor

cattanea

Fecha

Mayo 31, 2024 a las 10:16 PM CEST

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Autor

emilita

Fecha

Mayo 8, 2024 a las 05:43 PM MDT

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Qué

Gorrión Corona Blanca (Zonotrichia leucophrys)

Autor

emilita

Fecha

Mayo 9, 2024 a las 08:41 AM MDT

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Autor

emilita

Fecha

Mayo 9, 2024 a las 04:03 PM MDT

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Qué

Zorzal de Anteojos (Catharus ustulatus)

Autor

emilita

Fecha

Mayo 12, 2024 a las 10:39 AM MDT

Fotos / Sonidos

Autor

emilita

Fecha

Mayo 26, 2024 a las 11:24 AM MDT

Fotos / Sonidos

Autor

emilita

Fecha

Mayo 26, 2024 a las 12:14 PM MDT

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Autor

mossgeek

Fecha

Marzo 28, 2024 a las 06:32 AM MST

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Autor

mossgeek

Fecha

Marzo 28, 2024 a las 06:32 AM MST

Descripción

on rock

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Autor

crseaquist

Fecha

Abril 17, 2024 a las 09:22 AM CDT

Descripción

Gathered dry leaves on 2024-02-03 and stored in water.

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Autor

janie_c

Fecha

Abril 2024

Descripción

Spores, 16+/asque

Etiquetas

m

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Qué

Chipe Playero (Setophaga palmarum)

Autor

taylorse

Fecha

Abril 24, 2022 a las 04:22 PM EDT

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Qué

Vireo Gorjeador (Vireo gilvus)

Autor

mhincz

Fecha

Mayo 18, 2024 a las 10:00 AM EDT

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Qué

Culebra Listonada Común (Thamnophis sirtalis)

Autor

mhincz

Fecha

Mayo 18, 2024 a las 03:13 PM EDT

Descripción

Melanistic garter snake.

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Qué

Bacterias (Reino Bacteria)

Fecha

Noviembre 22, 2023 a las 06:50 PM +05

Descripción

Video: https://youtu.be/YkORShmMZTk
Sampling location: The soil sample was collected from the bank of a pond on the Bagaryak River, near the water. The soil was wet but gradually dried out.
Date and time of collection: September 8, 2023
The sample was stored in a sealed glass container at room temperature.
On September 22, 2023, at 1 PM, a small amount of this soil was mixed with clean water.
Date and time of observation: November 22, 2023, at 7 PM

A number of clusters of bacteria in an unidentified particle of dead organic matter.
Rod-shaped bacteria that form star-shaped clusters. Each bacterium is constantly moving. So is each cluster as a whole.

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Fecha

Mayo 17, 2024 a las 05:53 PM IST

Fotos / Sonidos

Fecha

Mayo 2024

Lugar

Sligo, IE (Google, OSM)

Descripción

I

Fotos / Sonidos

Autor

crseaquist

Fecha

Abril 8, 2024 a las 01:56 PM EDT

Fotos / Sonidos

Autor

eontlichens

Fecha

Mayo 16, 2024 a las 02:41 PM EDT

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Qué

Chipe Corona Negra (Cardellina pusilla)

Autor

burke_korol

Fecha

Mayo 16, 2024 a las 09:34 AM ADT

Fotos / Sonidos

Fecha

Mayo 8, 2015

Descripción

F3 Hybrid Blue-winged Warbler x Golden-winged Warbler : as described in pp 156,158 https://www.westernfieldornithologists.org/archive/V42/WB-V42(3)-webComp.pdf

"This decision recognized evidence from the zone of hybridization that a black
postocular eyeline curling down around the auriculars is typical of F3 or F4 hybrids."

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Qué

Armiño Americano (Mustela richardsonii)

Autor

burke_korol

Fecha

Mayo 13, 2024 a las 08:33 AM ADT

Fotos / Sonidos

Autor

strangway

Fecha

Mayo 5, 2024 a las 03:00 PM EDT

Descripción

Surface water grab from the Matchedash Bay - South Beaver Pond.

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Autor

woodgreg

Fecha

Mayo 2024

Fotos / Sonidos

Fecha

Junio 25, 2023 a las 10:18 AM +05

Descripción

Observation of 14 specimens of Bicosoeca. This water sample was rich in this genus of flagellates. And in fact, there were even more, but I decided to limit myself to the most successful specimens from the microscopic point of view. I have no certainty that they all belong to the same species. If you can see that there is more than one species, please tell me about it and I will split the observation.

A water sample was taken from the bank of the Ufa River. The sample was stored at room temperature and observed 7 days after collection.

Video: https://youtu.be/Q2yi91jhIXE

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Qué

Tortuga Pintada (Chrysemys picta)

Autor

eullstrom

Fecha

Mayo 1, 2024 a las 02:31 PM PDT

Descripción

Found dead:(

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Qué

Gorgojos, Catarinas Y Parientes (Infraorden Cucujiformia)

Autor

deckimeters

Fecha

Mayo 4, 2024 a las 06:27 PM EDT

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Qué

Vireo Ojos Blancos (Vireo griseus)

Autor

oridgen10

Fecha

Abril 29, 2024 a las 01:19 PM EDT

Fotos / Sonidos

Qué

Chipe Encapuchado (Setophaga citrina)

Autor

oridgen10

Fecha

Abril 29, 2024 a las 09:49 AM EDT

Fotos / Sonidos

Qué

Jilguero Canario (Spinus tristis)

Autor

oridgen10

Fecha

Abril 29, 2024 a las 08:41 AM EDT

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Autor

ahuereca

Fecha

Septiembre 7, 2023 a las 12:47 AM MDT

Fotos / Sonidos

Autor

ahuereca

Fecha

Septiembre 7, 2023 a las 12:49 AM MDT

Fotos / Sonidos

Autor

peptolab

Fecha

Abril 27, 2024 a las 10:50 PM EDT

Descripción

Spirostomum ambiguum Ehrenberg, 1834. from the superficial river edge benthos of the freshwater segment of the estuarine Peconic River. Imaged in Nomarsdki DIC on Olympus BH2S using Splanapo 20 0.70 and SPlanapo 40 0.95 objectives plus variable phone camera cropping on Samsung Galaxy S9+. The cell measures 960 um in length. The peristome is 2/3 the length of the body with the cytostome at the posterior 2/3 location. There is a large terminal contractive vacuole with a long collecting canal reaching almost the anterior end of the cell. The macronucleus is moniliform forming a chain of connected elongate spindle shaped macronuclear nodules beginning at the anterior 40% of the cell length and extending almost to the posterior end.

"Spirostomum ambiguum Ehrenberg, 1834. [syn: Trichoda ambiguum Müller, 1786; S. ambiguum var. major Roux, 1901] 900 m several mm long. Length: width ratio about 9-17. 15-25 kineties on each side; heterogeneous, numerous (4-5) CG rows per stripe. Peristome always longer than 1/2 of the body length, often reaching 2/3. CV much shorter than body length, rarely exceeding 1/10. The color depends on cytoplasmic granules. Moniliform MAC with 12-50 (avg. 15-25) nodules not exceeding 35 45 m in length when stained by Feulgen reaction. Numerous (up to 100) MICs 1-2 m long. Mono phyletic. Only found in freshwater. Reported in central and northern Europe, England, Russia, central Africa, USA, Jamaica, India and Japan. It sometimes harbors prokaryotic symbionts in the MAC. Spirostomum ambiguum is a well-defined, easily recognizable morphospecies whose monophyly is also strongly supported by molecular sequences" (1).

"Differential diagnosis
1) Size in vivo 1-000-4000 x 48-100 um, mostly 1200-2000 um. Visible with the naked eye as a white thread. Very flexible and contractile, shortens to approximately 390-430 x200-220 um. Contracted cells cigar-shaped.
2) Shape slender to moderately broad worm-shaped, more or less parallel-sided, 10-17 times longer than wide. Front end rounded, rear end truncated. Slightly flattened laterally. Ventral side in area of ​​the mouth entrance slightly bulging.
3) Macronucleus moniliform or rosary-shaped, consists of 10-50, mostly 15-20 ellipsoids, about 18-53 x 12-24 um large nodes that form a long band that approaches the dorsal side. The number of nodes correlates positively with the age of the cell (REPAK & ISQUITH L974).
4) Contractile vacuole at the posterior end, with a long collecting duct extending forward along the dorsal side which sometimes shows ampullary extensions.
5) Close under the pellicle there are many spherical, spherical, yellowish granules arranged in elongated bands of 4-5 rows each which give the cell a yellowish to brownish color.
6) About 70-90 slightly spiraling rows of cilia, consisting of basal bodies arranged in pairs are constructed, but only the front one has a cilium.t
When the cells contract (startle reaction), the rows of eyelashes spiral around the body.
7) The adoral membrane zone extends from the anterior end to the posterior third (about 65-70 % of the body length) and turns to the right at the lower end. Parallel to the adoral membranelle zone a non-ciliated oral groove, which is bordered on the right by an undulating membrane.
8} Movement hatching, worm-like crawling and writhing. Fluidity with longitudinal rotation axis, with the front end describing a cone-shaped body of revolution. In the plankton falling floating with inclined longitudinal axis" (2).

"Spirostomum ambiguum is easy to recognize because of its size and shape, but the differentiation with S. minus causes considerable difficulties. There are many shape variations which occur, size and shape are not reliable distinguishing features. Usually S. minus is significantly slimmer and almost never reaches a length of 1 mm, while S. ambiguum is more compact, stockier and over 1 m long. Only the length of the adoral membrane zone in relation for body length (S. ambiguum: 65-70 %; S. minus: 35-50%) remains reasonably reliable distinguishing feature, but here too the differences do not seem to be too pronounced. Furthermore, the ciliates S. semivirescens have a similar size and shape (up to 2 mm, very slender, adoral membrane zone up to 50 % of body length, green through symbiontic algae) and Homalozoon vermiculare (up to 1.5 mm, 5-21 contractile vacuoles along the dorsal side, mouth small and only at the front end) as well as microturbellaria and nematodes. The characteristics 1,3 and 7 are particularly important for identification" (2).

  1. Focusing on Genera to Improve Species Identification: Revised Systematics of the Ciliate Spirostomum Vittorio Boscaroa,1, Daniela Carducci, Giovanna Barbieri, Marcus V.X. Senra, Ilaria Andreoli, Fabrizio Erra, Giulio Petroni, Franco Verni, and Sergei I. Fokin. Protist, Vol. 165, 527–541, August 2014
  2. FOISSNER W., BERGER H. & KOHMANN F. (1992): Taxonomische und ökologische Revision der Ciliaten des Saprobiensystems - Band II: Peritrichia, Heterotrichida, Odontostomatida. – Informationsberichte des Bayer. Landesamtes für Wasserwirtschaft, 5/92: pp 317-25.

Fotos / Sonidos

Autor

mnold1

Fecha

Abril 22, 2024 a las 10:53 PM EDT

Descripción

mag. 400x

  • A pond-side water/periphyton sample was taken 04/22/2024 using a small sample bottled attached to an extension pole. Air temp 61F.

Long, juggling club-shaped cells, with siliceous scales, on stalks directed toward the colony center. Two flagella per cell, one long one short. This taxon has been previously observed in this general location, https://www.inaturalist.org/observations?place_id=any&taxon_id=494360&user_id=mnold1&verifiable=any.

Video shows a slowly rotating colony, https://youtu.be/nJn1INXd_co.

Ref. https://www.keweenawalgae.mtu.edu/gallery_pages/synurophyceans.htm

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Qué

Mosquitero Dorsiclaro (Phylloscopus chloronotus)

Autor

ziggypop74

Fecha

Marzo 29, 2024 a las 09:50 AM +06

Fotos / Sonidos

Autor

eontlichens

Fecha

Abril 25, 2024 a las 09:38 AM EDT

Descripción

First Lanark County record

Fotos / Sonidos

Autor

mnold1

Fecha

Abril 22, 2024 a las 04:42 PM EDT

Descripción

Mag. 400x (1,4,6); 200x (2,3,5)

  • A pond-side water/periphyton sample was taken 04/22/2024 using a small sample bottled attached to an extension pole. Air temp 61F.

Various forms of Hyalotheca dissiliens. The first 3 images show a mass of H. dissiliens zygospores. These masses are the largest I've encountered and were seen throughout the slide. The 4th image shows a segment of H. dissiliens with cells attached in filamentous form, surrounded by broad mucilaginous sheath. The last 2 images show H. dissiliens in single cell format. Both lateral views (barrel-shaped) and apical views (where the chloroplast has a stellate form) are visible.
Ref. https://www.outerhebridesalgae.uk/desmids/desmid-species.php?id=324

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Autor

cchapman-lam

Fecha

Febrero 2024

Fotos / Sonidos

Qué

Perlita Azulgrís (Polioptila caerulea)

Autor

bkinder832

Fecha

Mayo 9, 2015 a las 09:26 AM EDT

Fotos / Sonidos

Qué

Grévol Engolado (Bonasa umbellus)

Autor

ikhom

Fecha

Abril 20, 2024 a las 01:14 PM EDT

Descripción

A single egg in a poorly constructed nest on the ground. It was smaller, about 2/3 of a chicken egg.

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Qué

Chipe Encapuchado (Setophaga citrina)

Autor

mkkennedy

Fecha

Abril 18, 2024 a las 09:53 AM ADT

Fotos / Sonidos

Autor

peptolab

Fecha

Abril 4, 2024 a las 05:05 PM EDT

Descripción

Paramecium nephridiatum V. Gelei, 1925 from the brackish estuarine pond Pussy's Pond, an offshoot of Acabonac Harbor. The population arose after feeding the culture with boiled wheat seeds. Imaged in Nomarski DIC on Olympus BH2S using SPlanapo 40 0.95 and SPlan 100 1.25 oil objectives plus variable phone camera cropping on Samsung Galaxy S9+.

The cells measure from 100-165 um in length. There is a large oval macronucleus usually situated slightly anterior to the cell equator and 3-4 small endosomal-type micronuclei can be observed with exact focus in the anterior end of the cell remote from the macronucleus- an important specific character of P. nephridiatum according to Fokin et al 1999 (1) The oral apparatus is situated posterior to the macronucleus with the cytostome roughly equatorial. There is an inconspicuous tuft of long caudal cilia. The two contractile vacuoles, one anterior and one posterior, have up to 15 short radiating canals and 2-3 excretory pores- another important specific characteristic of P. nephridiatum (1). There is a dense investment of subpellicuar extrusomes. The pellicle is divided into rectangular spaces on optical sectioning of the surface, a feature not mentioned by Fokin et al 1999. These features point strongly to P. nephridiatum. However, the more posterior location of the oral opening (as opposed to slightly anterior to the middle of the cell) and the peculiar pellicular division into rectangular spaces suggest that this might be a cryptic species of P. nephridiatum. Indeed, Przyboś et al 2019 describe 6 cryptic species within P. nephridiatum (2)

The cell shape with its rounded posterior end, and broad anterior part is of the "bursaria" type (Wichterman 1986) or "woodruffi" type according to Jankowski (1969). The oral opening is situated a little anterior to the middle of the cell. The cell surface is uniformly ciliated except for several long caudal cilia located close to the posterior end of the dorsal side, but not on the top. The abundant subpellicular trichocysts are distributed uniformly. Specimens were about 145 x 47 um long in vivo but shrank 10% after the silver nitrate impregnation. In silver-impregnated specimens, there were ~38 rows of ventral kineties and ~35 dorsal kineties. The preoral suture is distinct, but the postoral suture is very obscure. The cytoproct is situated in the posterior third. The vestibular zone is conspicuous and is terminated by the distinctive shape of the buccal opening. Two peniculi and open quadrulus are located on the dorsal and left wall of the buccal cavity. The endoral membrane is situated along the entire right edge of the buccal opening but its dikinetids are not recognizable in all specimens. It has 15 dikinetids on the average. The buccal cavity size various around 30 um. On the dorsal side of the body the contractile vacuole pores are very distinctive both on impregnated specimens as well as in living cells. Usually, both contractile vacuoles have more than one pore each, typically two or three. However, we have found two stocks (WCh-1 and WS-12) where one of the contractile vacuoles quite often (up to 50%) had only one pore. Both contractile vacuoles usually have 8-14 collecting canals, ten on average. Numerous crystals were very often found in the cytoplasm, but their quantity and location varied, probably depending on the culture conditions. The nuclear apparatus is located in the anterior part of the cell. One slightly ellipsoid or ovoid macronucleus, ~30x36 um in living cell and ~17x23 um in stained cells, on average, resides just anterior to the equator of the cell. In Feulgen-stained cells the macronucleus has a very intense colour. The three to four spherical micronuclei of the "endosomal" type (Fokin 1997), ~3 um in diam. (on average) are distributed irregularly along the anterior part of cell. Endocytobiotic bacteria are often found in the cytoplasm (Fokin 1989) and can also be found in the perinuclear space and in the macronucleus (Fokin 1989; Fokin and Sabaneyeva 1997)" (1).

"Swimming behavior - During swimming this species spirals on its long axis in both directions (Fokin 1987). We could not find any simple triggers (food, time) for changing this swimming direction. Typically, "left spiral swimmers" and "right spiral swimmers" were present at the same time in the culture. During the several years of investigation of this trait there was some preference of the cells from the same stocks to spiral in the left direction. Remarks- Gelei (1925) described a new species of Paramecium, Paramecium nephridiatum, based on the material which he had found in his laboratory aquarium. This population was in fact a mixture of the new species and Paramecium caudatum (Gelei 1938). This was the reason why some features of the new ciliate were similar to P. caudatum so that no one recognized this new species in nature, though reference to P. nephridiatum was made by Kahl (1931) and Kalmus (1931). Gelei (1938) redescribed the species from a native population (Tisza River, Szeged, Hungary) using a "clean culture". For unknown reasons, this new description did not attract the attention of protozoologists and in all subsequent reviews, P. nephridiatum was considered a nonvalid species (Vivier 1974; Wichterman 1953, 1986) even when the article of Gelei (1938) was listed in the references. Only once was P. nephridiatum mentioned in a short abstract as a species living in Florida, USA (Bovee 1983), although characters of the species were not listed in this publication. Since 1983, one of us (S. F) has repeatedly collected a species of Paramecium with multiple contactile vacuole pores, which is a distinctive trait of P. nephridiatum, although it was considered for a time as a feature of Paramecium woodruffi (Agamaliev 1983; Fokin 1986), Jankowski (pers. commun.)" (1).

"Occurrence and ecology- A number of stocks of P. nephridiatum were isolated from the sea shores of northern Europe: the North, Baltic, White, and Barents Sea coasts. It was detected during sampling in Woods Hole, MA, USA, Atlantic Ocean and on Sakhalin Island, Sea of Okhotsk. The salinity of these samples varied from 1.5-32 % The species was also found in a fresh-water body in Jerusalem Zoo, Israel. Samples were taken mainly during the summer, from mid-April (Wood Hole) to November (North Sea coast).

Sampling of the same wild population of P. nephridiatum (Sredny Island, White Sea, Russia) has been repeated every year since 1990 to observe long-time changes in the population, as well as the euryhaline ability of the species. This population was present at salinities from 4-35% and in the temperature range from 10-25” C. Very often the populations of P. nephridiatum occurred at the lower limit of oxygen concentrations. They were mainly feeding on bacteria. In the same samples these other ciliates were usually found: Prorodon sp., Frontonia marina, Metopus sp., P. calkinsi, P. woodruffi, and sometimes P. duboscqui" (1).

  1. Sergei I. Fokin, Thorsten Stoeck, and Helmut J. Schmidt; Rediscovery of Paramecium nephridiatum Gelei, 1925 and its Characteristics. J.Eukaryot.Microbiol. 46(4):416-426, 1999
  2. Evaluation of the molecular variability and characteristics of Paramecium polycaryum and Paramecium nephridiatum, within subgenus Cypriostomum (Ciliophora, Protista). Ewa Przyboś, Maria Rautian, Alexandra Beliavskaia, Sebastian Tarcz . Mol Phylogenet Evol . 2019 Mar:132:296-306

Fotos / Sonidos

Autor

emilita

Fecha

Abril 6, 2024 a las 01:50 PM EDT

Fotos / Sonidos

Qué

Cormorán Orejón (Nannopterum auritum)

Autor

emilita

Fecha

Abril 7, 2024 a las 03:08 PM EDT

Fotos / Sonidos

Qué

Olmos (Género Ulmus)

Autor

emilita

Fecha

Abril 10, 2024 a las 10:31 AM EDT

Descripción

Covered in butterflies and flies. Didn’t seem to be leaking sap so I don’t know why.

Fotos / Sonidos

Autor

emilita

Fecha

Abril 15, 2024 a las 03:43 PM MDT

Descripción

On white spruce

Fotos / Sonidos

Autor

emilita

Fecha

Abril 15, 2024 a las 03:52 PM MDT

Descripción

On white spruce

Fotos / Sonidos

Autor

emilita

Fecha

Abril 15, 2024 a las 04:30 PM MDT

Fotos / Sonidos

Autor

emilita

Fecha

Abril 15, 2024 a las 04:30 PM MDT

Fotos / Sonidos

Autor

emilita

Fecha

Abril 15, 2024 a las 04:34 PM MDT

Descripción

Still unsure if it’s just orange rock posy?

Fotos / Sonidos

Autor

janie_c

Fecha

Marzo 2024

Lugar

Canada (Google, OSM)

Fotos / Sonidos

Autor

janie_c

Fecha

Marzo 2024

Lugar

Canada (Google, OSM)

Fotos / Sonidos

Fecha

Julio 21, 2023 a las 07:06 PM MSK

Descripción

Sampling location: A water sample was collected from Istok Lake near the shore, where snags and aquatic vegetation were present.
Several specimens of a freshwater sponge growing on different parts of Fontinalis antipyretica (water moss).
Date and time of collection: 16 Jul 2023 at 3 PM
Date and time of observation: 21 Jul 2023 at 7 PM
The sample was stored at room temperature in a plastic container.
During the initial days, the sponges were actively filtering, causing visible ripples in the water. However, by the day of observation, the noticeable water movement had ceased.

Fotos / Sonidos

Qué

Liquen Tripa de Roca (Umbilicaria mammulata)

Autor

eontlichens

Fecha

Abril 2024

Fotos / Sonidos

Autor

ikhom

Fecha

Abril 10, 2024 a las 12:42 PM EDT

Descripción

On attached corticated Populus branch tiny black cups.
Next to Resupinatus applicatus.
Asci with many spores, IKI+.
Ascospores grey to brown with 1-septum, measured
*(5.1) 5.8 - 8.3 (8.7) × (2.4) 2.7 - 3.7 (3.9) µm
Q = (1.5) 1.8 - 2.6 (2.8) ; N = 17
Me = 7.1 × 3.3 µm ; Qe = 2.2

Etiquetas

Fotos / Sonidos

Qué

Pan Y Quesito (Draba verna)

Autor

emilita

Fecha

Abril 8, 2024 a las 11:26 AM EDT

Fotos / Sonidos

Autor

burke_korol

Fecha

Abril 8, 2024 a las 02:26 PM PDT

Fotos / Sonidos

Autor

emilita

Fecha

Abril 6, 2024 a las 11:29 AM EDT

Fotos / Sonidos

Fecha

Junio 11, 2013

Descripción

Spores 4-celled, avg. 17x5 um.

Fotos / Sonidos

Autor

ikhom

Fecha

Marzo 30, 2024 a las 04:08 PM EDT

Descripción

On decorticated Eastern White Cedar - Thuja occidentalis branch, tiny cup fungi.
Apothecia sessile, with dark (black) margin and pale hymenium.
Asci 8-spored, IKI+ blue.
Ascospores hyaline, cylindrical, C-shaped, with 0-1 septum, measured
*(28) 29.4 - 33.5 (34.4) × (2.1) 2.5 - 3.3 (3.4) µm
Q = (8.1) 9.8 - 13 (14.7) ; N = 15
Me = 31.6 × 2.8 µm ; Qe = 11.3

Fotos / Sonidos

Autor

peptolab

Fecha

Abril 3, 2024 a las 10:13 AM EDT

Descripción

Spirostomum teres Claparède & Lachmann, 1859 from Pussy's Pond, a brackish offshoot of the estuary Acabonac Harbor. Imaged in Nomarski DIC on Olympus BH2 using SPlanapo 20 0.75, SPlanapo 40 0.95 objectives and Splan 100 1.25 oil objective plus variable phone camera cropping on Samsung Galaxy S9+. The cells measure from 480 up to 560 um in average length, have a compact ellipsoid macronuclear nodule, and are brownish in color and highly spirally contractile. A single row of well-developed oral membranelles defines the left side of the long, thin peristomial field, which runs parallel to the main body axis from the anterior end to the cytostome, which is located at 45% of the body length. One stripe of packed cortical granule rows (average 3) between each kinety pair; cortical granules are of different sizes. The contractile vacuole is single and posteriorly located, with a long collecting canal extending along the dorsal side often reaching the anterior end.

"Spirostomum is a genus of ciliated protists that belongs to the class Heterotrichea. It is known for being very contractile. Having been first identified by Christian Gottfried Ehrenberg in 1834, further research has identified eight additional true morphospecies. This bacterivore genus mainly lives in the sediment deposits at the bottom of various aquatic habitats, and members possess rquA genes that could be responsible for their ability to survive in these hypoxic and anoxic environments. They are identifiable by their relatively (to other ciliates) large tubular/flat vermiform bodies. Their life cycle consists of a growth stage, in which they mature, and asexual and sexual reproduction stages. Some species are model organisms for studies on human pathogenic bacteria, while others are sensitive and accurate bioindicators for toxic substances" (1).

"Spirostomum Ehrenberg, 1838 are conspicuous ciliates protists that are easily recognized by their large sizes (500-1000 µm) and elongate bodies, being easily confounded with small helminths. The name Spirostomum refers to the ability these ciliates have to contract in a spiral mode. This type of contraction is due to the presence of post-ciliary, sub-pellicular fibers that arise on the anterior end and spiral in a counterclockwise direction toward the posterior end of the body. Of the eight species that currently comprise Spirostomum, five (including S. minus) possess a moniliform macronucleus" (2). "There are currently eight accepted morphospecies in the genus: S. ambiguum, S. minus, S. teres, S. yagiui, S. dharwarensis, S. semivirescens, S. subtilis, S. caudatum" (1). Among all species of Spirostomum, only S. teres and S. caudatum have a compact macronucleus. S. caudatum is easily separated from S. caudatum by the latter's long thin tail (1). Another old species similar to S. teres is S. ephrussi but according to Repack and Isquith (1974), S. ephrussi is junior synonym of S. teres" (2).

"Spirostomum teres Cláparéde and Lachmann, 1858-1859. [syn: S. ephrussi Delphy, 1939] 150-650 um (avg. 250-450) um long. Length: width ratio about 5-16 (avg. 8-12). 5-15 (avg. 7-10) kineties on each side; usually homogeneous cortical granule rows, variable in number per stripe (2-4). Peristome from 1/3 to slightly more than 1/2 of the body length. Contractile vacuole usually less than 1/5 of the body length. Often brownish. Ellipsoid macronucleus (length: width ratio < 5) in the middle sector of the body, about 20-50 x 5-20 um when stained by Feulgen reaction. A few (1-3) micronuclei 1-2 m long. Molecular analyses suggest that this morphospecies include phylogenetically diverse lineages, some of which are more closely related to S. yagiui and S. dharwarensis; no reliable morphological autapomorphy has yet been detected for these lineages. Found in both fresh- and brackish-water environments. Reported in Europe, central Africa, Madagascar, USA, Brazil, Caspian Sea, India, China and Korea. It sometimes harbors cytoplasmic prokaryotic symbionts" (3).

"Differential diagnosis: 1) Size in vivo 150-600 x20-75 um, mostly 200-400 um, according to DRAGESCO (1960) brackish water forms even reach a length of 880 um. Very contractile; contractile cells more clearly spindle-shaped. 2) Shape moderately broadly cylindrical, somewhat expanded in the middle third, 10-15 times longer than wide. Anterior half distinct, posterior slightly narrowed. Front end slightly beaked, rear end broadly truncated. 3) Macronucleus ellipsoid, about 25-48 x 9-12 um in size, lies in the middle third. 1-2 lenticular, 2-4 um large micronuclei. 4) Contractile vacuole at the posterior end, with a long collecting duct extending forward along the dorsal side. 5) Close under the pellicle, very many spherical, arranged in elongated bands of 2-3 rows each lemon-yellow granules (oil immersion), which give the cell a yellowish tinge. 6) About 25-30 rows of cilia, few in stretched cells, strong in contracted individuals run spirally. 7) The adoral membranelle zone extends from the anterior end to about the middle of the body and bends to the right at the lower end. Oral groove bordered on the right by an undulating membrane. 8] Movement slipping, wriggling and crawling. Floats with rotation around the longitudinal axis" (4).

1, https://en.wikipedia.org/wiki/Spirostomum#cite_note-:3-1

  1. Morphology and 18S rDNA gene sequence of Spirostomum minus and Spirostomum teres (Ciliophora: Heterotrichea) from Rio de Janeiro, Brazil. Noemi M. Fernandes & Inácio. D. da Silva Neto. ZOOLOGIA 30 (1): 72–79, February, 2013 http://dx.doi.org/10.1590/S1984-46702013000100009

  2. Focusing on Genera to Improve Species Identification: Revised Systematics of the Ciliate Spirostomum Vittorio Boscaroa,1, Daniela Carduccia, Giovanna Barbieria, Marcus V.X. Senrab, Ilaria Andreolia, Fabrizio Erraa, Giulio Petronia, Franco Vernia, and Sergei I. Fokin. Protist, Vol. 165, 527–541, August 2014

  3. FOISSNER W., BERGER H. & KOHMANN F. (1992): Taxonomische und ökologische Revision der Ciliaten des Saprobiensystems - Band II: Peritrichia, Heterotrichida, Odontostomatida. – Informationsberichte des Bayer. Landesamtes für Wasserwirtschaft, 5/92: 502 pp.



  4. Fotos / Sonidos

    Autor

    mnold1

    Fecha

    Marzo 2024

    Descripción

    Mag. 400x

    • A water sample taken on 03/31/2024, from a small vernal stream in a wooded area, using a small sample bottled attached to an extension pole. Air temp 46F.

    I'm not certain about the ID, but will check with geraldojpr and roman_romanov. Most fascinating about this specimen is that one semi-cell is 3-radiate (3 lobes) and the other is 6-radiate. An intermediate polymorph! Will its progeny be 3- or 6 radiate or a hybrid of both? Interesting! S. margaritaceum is noted to be "variable in the in the number of radial processes, , with 4-6 being the most often found" (https://www.outerhebridesalgae.uk/desmids/desmid-species.php?id=359) ... I could not find a reference noting 3-radiate S. margaritaceum. The first composite image shows the specimen in lateral view, then beginning to roll backwards. The second composite of 9 photos shows the same specimen making a ~180⁰ rotation about a slanted axis. (Panels 8 and 9 vary only in depth of field, not position of the specimen.) Too cool!
    For more reference images of S. margaritaceum see:

    Fotos / Sonidos

    Qué

    Águila Cabeza Blanca (Haliaeetus leucocephalus)

    Autor

    pluvierdodu

    Fecha

    Abril 3, 2024 a las 09:16 AM EDT

    Fotos / Sonidos

    Autor

    mnold1

    Fecha

    Abril 2024

    Descripción

    Mag. 200x

    • A water sample taken on 03/31/2024, from a small vernal stream in a wooded area, using a small sample bottled attached to an extension pole. Air temp 46F.

    The long neck and specialized oral apparatus suggest membership in the genus Lacrymaria. (Not Lacrymaria olor since it lacks an oral dome and no evidence longitudinal pellicle strips.?) - NOT Lacrymaria! See diagnosis by Bruce Taylor below - Two specimens were observed in the same field of view, one 320µ (partially extended) and a much smaller specimen at 150µ (also partially extended). As they neared each other (no contact occurred) a wonderful little pas de deux ensued. Perhaps depth of field buffered their encounter more than I realized (one individual is usually in the background and out of focus, difficult to discern... but it's there!). After a short dance of to-and-fros and dips of the head, they parted ways seemingly without ever acknowledging the presence of the other. In this photo series, documentation of the pas de deux begins at image 7.

    Fotos / Sonidos

    Autor

    ikhom

    Fecha

    Abril 1, 2024 a las 01:29 PM EDT

    Descripción

    On dead, corticated Jack Pine branches, tiny, black cup fungi. Apothecia sessile.
    Asci with many globose spores, IKI+.
    Ascospores about 2um in diameter.

    Etiquetas

    Fotos / Sonidos

    Fecha

    Agosto 2021

    Fotos / Sonidos

    Fecha

    Marzo 2024

    Fotos / Sonidos

    Fecha

    Noviembre 25, 2023 a las 08:35 AM +05

    Descripción

    Video: https://youtu.be/OYakkMPRt60
    Sampling location: The soil sample was collected from the bank of a pond on the Bagaryak River, near the water. The soil was wet but gradually dried out.
    Date and time of collection: September 8, 2023
    The sample was stored in a sealed glass container at room temperature.
    On November 20, 2023, at 1 PM, a small amount of this soil was mixed with clean water.
    Date and time of observation: November 25, 2023, at 8 AM

    Fotos / Sonidos

    Autor

    mnold1

    Fecha

    Junio 30, 2022 a las 04:18 PM EDT

    Descripción

    Mag. 100x (3), 400x (1,2,4,5)
    Large ciliate (though the anterior portion looks worm-like). Three specimens: A in photos 1&2, B and C in photos 3,4, & 5. All 3 specimens traveled exclusively in a semi-transparent, mucilaginous tube; this is especially apparent in the low-power photo, 3.

    • After gently pushing aside the cover of lily pads, a pond side water sample was taken on 06/30/2022 using a 10µ dip net to enrich for microbes. Air temp. 81°F.

    Fotos / Sonidos

    Autor

    woodgreg

    Fecha

    Marzo 29, 2024 a las 04:42 PM EDT

    Fotos / Sonidos

    Autor

    deckimeters

    Fecha

    Marzo 29, 2024 a las 06:05 PM EDT

    Fotos / Sonidos

    Autor

    ahuereca

    Fecha

    Marzo 2024

    Descripción

    cf.

    on Lecanora saligna

    Fotos / Sonidos

    Autor

    eontlichens

    Fecha

    Marzo 2024

    Descripción

    No C test performed. Large psuedocyphellae. Presumed ID