Carboniferous crustaceans

REDIRECT Tesnusocarididae

The order Pygocephalomorpha is an extinct group of peracarid crustaceans. Pygocephalomorpha appeared in the Late Devonian, were abundant from the Carboniferous era until their extinction in the Early Permian era.

Tesnusocarididae is an extinct family of remipedes and the sole member of the order Enantiopoda. It contains two genera, the type genus Tesnusocaris, and Cryptocaris, both known from the Carboniferous, with Tesnusocaris known from the Lower Pennsylvanian Tesnus Formation and Cryptocaris from the Middle Pennsylvanian Mazon Creek fossil beds.

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

Tesnusocaris is an extinct, monospecific genus of remipedian crustaceans that lived in the Pennsylvanian period, one of the two representatives of the extinct remipedian order Enantiopoda. It is known from a fossil discovered in the Lower Pennsylvanian (Paleozoic, Carboniferous) Tesnus Formation of Texas. The other known enantiopod remipedian is Cryptocaris hootchi of the Mazon Creek fauna.