Stygobromus lucifugus

Stygobromus lucifugus, the rubious cave amphipod is an extinct species of amphipod crustacean in the family Crangonyctidae. It was first described by Oliver Perry Hay who found it living in a well near Abingdon, Knox County, Illinois, United States,^[3] and it was endemic to that state.^[4]

Stygobromus lucifugus
Conservation status
Extinct  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Amphipoda
Family:	Crangonyctidae
Genus:	Stygobromus
Species:	†S. lucifugus
Binomial name
†Stygobromus lucifugus (O.P. Hay, 1882)
Synonyms[2]
Apocrangonyx lucifugus (O.P. Hay, 1882) Crangonyx lucifugus O.P. Hay, 1882