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This observation is about the lichens (black dots) that surround the one in the center. They seem to be from Genus Lecidella (Disc Lichens) or Genus Lecidea (Tile Lichens); I would appreciate any help with ID

Very strange lichens (?), sort of centaurs between Lecidella-like discs and folious, fungi-like lobes... I can't remember ever seeing such one before; the colony was growing on artificial stone (a roadblock of some kind, covered by white emulsion (?)

I initially thought it could be Genus Placynthium (perhaps P. stenophyllum or P. subradiatum), but was suggested by one of my Twitter connections that it could be Genus Rinodina, likely Rinodina oleae (https://twitter.com/SmallWorldGdn/status/1402189866599956480)