Gambusia georgei sp. nov. from San Marcos, Texas


Material Information

Gambusia georgei sp. nov. from San Marcos, Texas
Series Title:
Hubbs, Clark
Peden, Alex E.
American Society of Ichthyologists and Herpetologists (ASIH)
Publication Date:


Subjects / Keywords:
Animal Fins ( local )
Elbow ( local )
Hybrid Species ( local )
Pigments ( local )
Sympatric Species ( local )
Freshwater Ecology ( local )
Genetic Hybridization ( local )
Aquatic Plants ( local )
serial ( sobekcm )


Three species of Gambusia occur sympatrically in the upper San Marcos River; each species occupies a specific habitat. One has not previously been noted in the literature and is herein described as Gambusia georgei. The limited hybridization with G. affinis does not seem to have reduced the specific integrity of either type. The new species is extremely rare and could be exterminated by minor habitat modifications. Gambusia georgei is a localized endemic inhabiting thermally consistent shallow water over muddy bottom with sparse aquatic vegetation in the San Marcos River. It is differentiated from all other species of Gambusia by having more than 5 segments of 4a incorporated into the elbow and by having a compound claw on the end of 4p.
Original Version:
Copeia, Vol. 1969, no. 2 (1969-06-03).

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University of South Florida Library
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