Prehistoric crustacean genera

Aeger is a genus of fossil prawns. They first occur in the Early Triassic (Paris biota), and died out at the end of the Late Cretaceous. A total of 21 species are known, which makes this the most diverse genus in the family Aegeridae.

Palaeocarpilius is an extinct genus of crabs belonging to the family Carpiliidae. The type species of this genus is Palaeocarpilius macrocheilus.

Acanthochirana is an extinct genus of prawn that existed during the upper Jurassic period. It was named by E. Strand in 1928. They are distinguished from the related genus Aeger by the presence of teeth on the rostrum, which are absent in Aeger.

Tumidocarcinus is an extinct genus of large crabs in the family Tumidocarcinidae, containing the following species:

Tealliocaris is an extinct genus of pygocephalomorphans that lived from the Late Devonian to Early Carboniferous periods in Europe and North America. The genus was established in 1908 by Ben Peach, and many species have been assigned to it since, though some are now invalid or have been reassigned to other genera. Although it can be inferred that T. loudonensis was originally intended as the type species of Tealliocaris, this species is now deemed a junior synonym of T. woodwardi, first described as a species of Anthrapalaemon in 1877, and thus T. woodwardi is currently deemed the type species