Stygobromus bakeri, a new species of groundwater amphipod (Amphipoda, Crangonyctidae) associated with the Trinity and Edwards aquifers of central Texas, USA

By

Gibson, Randy
Hutchins, Benjamin
Krejca, Jean K.
Diaz, Peter
Sprouse, Peter

Type

Article

Date of Publication

2021

Original Publication

Subterranean Biology

Volume

38

Pages

19--45

Subjects

cave , crenobiont , interstitial crustacean , karst , Spring , stygobiont , stygobite , subterranean , sympatric , troglomorphy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/subtbiol.38.61787

 

Abstract

A new stygobitic groundwater amphipod species, Stygobromus bakerisp. nov., is described from 4 central Texas limestone karst springs; John Knox Spring (Comal County), Jacob’s Well (Hays County), Mormon Spring (Travis County) and Salado Springs (Bell County). This species belongs to the predominately western Nearctic hubbsi species group of Stygobromus and differs from other species in the group by gnathopod 1 with row of 4 to 5 setae posterior to the defining angle, pereopods 6 and 7 with broadly expanded bases and distinct distoposterior lobes, gnathopods 1 and 2 with 2 rows of 3 singly inserted setae on the inner palm, and uropod 3 with single, slightly distal peduncular seta. Habitat, sympatric groundwater species, and conservation issues are discussed.