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Crustacean from Rhynie: Lepidocaris rhyniensis (398 words) |
 | This very small crustacean (up to 3 mm) is the most common and best-known animal from the Rhynie chert. |
| It belongs to an extinct order of the branchiopod crustaceans, the Lipostraca, and it is the oldest known species in this group. |
| It is also one of the earliest known freshwater crustaceans. |
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Branchiopoda - Wikipedia, the free encyclopedia (474 words) |
| Branchiopods in general are equipped with a ventral food groove, useful for suspension and filter feeding. |
| The water current in the ventral food groove, used for breathing and feeding in most species, are producing by a battery of unspecialised legs. |
| The small branchiopods, mostly represented by water fleas, have succeeded in becoming zooplankton in such a degree that waters filled with fish and other threats are no longer a problem. |
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