''Pachyonychus'' is a genus of flea beetles in the family

Chrysomelidae The insects of the beetle family Chrysomelidae are commonly known as leaf beetles, and include over 37,000 (and probably at least 50,000) species in more than 2,500 genera, making up one of the largest and most commonly encountered of all beetle ...

containing a single described species, ''P. paradoxus'', from the United States. The name is extremely similar to a different flea beetle, ''

Pachyonychis paradoxa ''Pachyonychis'' is a genus of flea beetles in the family Chrysomelidae containing a single described species, ''P. paradoxa'', from the United States The United States of America (U.S.A. or USA), commonly known as the United States (U. ...

'', named in 1860, that occurs on the same host plant.

References

Alticini Monotypic Chrysomelidae genera Articles created by Qbugbot Taxa named by Frederick Ernst Melsheimer {{Galerucinae-stub