Stygobromus lucifugus
Encyclopedia
Stygobromus lucifugus 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
), and it was endemic to that state.
Extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms , normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point...
species of amphipod
Amphipoda
Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. The name amphipoda means "different-footed", and refers to the different forms of appendages, unlike isopods, where all the legs are alike. Of the 7,000 species, 5,500 are classified...
crustacean
Crustacean
Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...
in the family Crangonyctidae
Crangonyctidae
Crangonyctidae is a family of cave-dwelling freshwater amphipod crustaceans. It contains the following genera:*Amurocrangonyx Sidorov & Holsinger, 2007 *Bactrurus Hay, 1902*Crangonyx Bate, 1859*Lyurella Derzhavin, 1939...
. It was first described by Oliver Perry Hay
Oliver Perry Hay
Oliver Perry Hay was an American professor, herpetologist, ichthyologist, and paleontologist. From 1894-1895 he worked at the Field Museum of Natural History as Assistant Curator of Zoology where, despite his specialty in ichthyology, he worked in all non-ornithological fields of zoology...
who found it living in a well near Abingdon
Abingdon, Illinois
Abingdon is a city in Knox County, Illinois, 50 miles west of Peoria. It is part of the Galesburg Micropolitan Statistical Area. The city was first settled in 1828 and was incorporated in 1857. In 1894, the patent for the common spring-loaded mousetrap was given to William Hooker of Abingdon,...
, Knox County
Knox County, Illinois
Knox County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 52,919, which is a decrease of 5.2% from 55,836 in 2000...
, Illinois
Illinois
Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...
(United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
), and it was endemic to that state.