Copytus cretaceous, Echevarría, 1988

Coimbra, João Carlos, Bergue, Cristianini Trescastro & Ramos, Maria Inês Feijó, 2020, Is Copytus Skogsberg, 1939 (Crustacea: Ostracoda) a neocytherideid? With description of a new family and two new species, Zootaxa 4729 (2), pp. 177-194 : 185

Copytus cretaceous (sic) Echevarría, 1988.

Probably the oldest Copytus species ever described is C. cretaceous (sic) Echevarría, 1988 from the Maastrichtian of the Province of Chubut, Argentinian Patagonia. This is notably smaller than other species, being only 0.48 mm long. It is slightly similar to C. laevata in outline but with a more pointed anterior margin and a faint ventral rib. Although Echevarría (1988) stated that the muscle scars cannot be clearly seen due to recrystallization, we believe that the trace of a circular aggregate of four scars can be seen with the aid of a magnifying glass on Echevarría’s fig. 2 of pl. 1. Ceolin et al. (2015) illustrated Copytus sp., a species recovered from the Maastrichtian/Danian of the Neuquén Basin, Argentina. It is similar to the Echevarría’s species, but rather larger (l = 0.649 mm).