Tetrachela

Tetrachela raiblana is an extinct species of polychelid crustacean from the Late Triassic. It is the only species in the family Tetrachelidae.^[1] It is distinguished from most other polychelids, including all the extant Polychelidae, by the retention of the diaeresis (divisions) of the uropodal exopods.^[2]

Tetrachela Temporal range: Late Triassic PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Superfamily:	Eryonoidea
Family:	†Tetrachelidae Beurlen, 1930
Genus:	†Tetrachela Reuss, 1858
Species:	†T. raiblana
Binomial name
†Tetrachela raiblana (Bronn, 1858)