Peck's Cave Amphipod

Stygobromus pecki, the Peck's cave amphipod, is a rare species of crustacean found in four cavern areas of southwestern Texas (Comal Springs, Hueco Springs, Landa Park, and Panther Canyon) in the United States. It is a federally listed endangered species in the United States and is also listed as Endangered on the IUCN Red List. Because of the species' limited geographical distribution, not much information on S.

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Stygoparnus comalensis es la única especie de escarabajo del género Stygoparnus, familia Dryopidae. ​ Fue descrito por Barr & Spangler en 1992. ​ Se distribuye por los Estados Unidos.