Pachyonychis

Pachyonychis is a genus of flea beetles in the family Chrysomelidae containing a single described species, P. paradoxa, from the United States.^[2]

Pachyonychis
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Cucujiformia
Family:	Chrysomelidae
Subfamily:	Galerucinae
Tribe:	Alticini
Genus:	Pachyonychis H. Clark, 1860[1]
Species:	P. paradoxa
Binomial name
Pachyonychis paradoxa H. Clark, 1860
Synonyms
Pachyonychus Crotch, 1873 (Missp.) Hamletia Crotch, 1873 Hamletia dimidiaticornis Crotch, 1873

The name is extremely similar to a different flea beetle, Pachyonychus paradoxus, named in 1847, that occurs on the same host plant; Crotch, in 1873, erroneously thought that Clark's name was spelled the same as the other species, and replaced Clark's name.^[3]