Euthycarcinoidaとは 意味・読み方・使い方

Euthycarcinoida is a group of amphibious freshwater arthropods that until recently were only known from the Carboniferous onwards. A single Ordovician/Silurian individual was identified in the Tumblagooda sandstone in 1993; a Devonian example was added from the Rhynie chert in 2003, and most recently a specimen has been found from the Cambrian. The organisms may have produced some varieties of Protichnites, the earliest arthropod trackways on land.