trilobita defined in 1951 year

trilobita - trilobita;
trilobita - Class of Arthropoda. Now extinct but abundant from Cambrian to Silurian. Marine, superficially resembling woodlice; one pair of antennae, all other appendages biramous and similar to each other. Probably related to ancestors of Crustacea.

near trilobita in Knolik

triguspid valvehome
letter "T"
start from "TR"
tringa alpina

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