Faxonius peruncus

Faxonius peruncus, the Big Creek crayfish, is a species of crayfish in the family Cambaridae. It is endemic to Missouri.^[2] The common name refers to Big Creek, where the original specimens were found.^[3]

Faxonius peruncus
Conservation status
Vulnerable  (IUCN 3.1)[1]
Critically Imperiled  (NatureServe)[2]
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Family:	Cambaridae
Genus:	Faxonius
Species:	F. peruncus
Binomial name
Faxonius peruncus (Creaser, 1931)
Synonyms
Orconectes peruncus[1]

Distribution

F. peruncus is limited to the St. Francis River watershed.^[1]

Threats

The main threat to this species is a related species, F. hylas which was introduced into the area in 1984. F. hylas out-competes, and hybridises with, F. peruncus.^[2] Also, pollution from the Southeast Missouri Lead District affects the water quality in the local area.^[1][2]