San Felipe gambusia
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See Garrett and Edwards (2003).
Etymology/Derivation of Scientific Name
Coloration: Predorsal stripe distinct and broad; no dark bands on sides; median fins without large black spots near their bases (Hubbs et al. 2008).
Counts: Dorsal fins 9 (rarely 10; Hubbs et al. 2008).
Body shape: Dorsal fin origin well behind anal fin origin (Hubbs et al. 2008
External morphology: Distal segments of anterior branch of 4th fin ray of gonopodium not coalesced to elbow; spines at tip of 3rd anal fin ray of male gonopodium 4-10 times longer than wide (Hubbs et al. 2008).
Internal morphology: Intestinal canal short with few convolutions (Hubbs et al. 2008).
Distribution (Native and Introduced)
Texas distribution: Restricted to the headwaters of San Felipe Creek, a 15-km tributary of the Rio Grande in the city of Del Rio (Val Verde County; Hubbs et al. 2008).
Abundance/Conservation status (Federal, State, NGO)
Special Concern (Hubbs et al. 2008). Listed as Endangered by the American Fisheries Society; categories of threats: present or threatened destruction, modification, or reduction of habitat or range; and a narrowly restricted range (Jelks et al. 2008).
Macrohabitat: Seems to prefer thermally-consistent spring flows (Hubbs et al. 2008).
Mesohabitat: Apparently most common in edge habitats adjacent to flowing waters (Hubbs et al. 2008).
Age at maturation:
Growth and Population structure:
Phylogeny and morphologically similar fishes
Gambusia clarkhubbsi is a member of the nobilis species group; occurs sympatrically with the Tex-Mex gambusia (G. speciosa; Hubbs et al. 2008).
Commercial or Environmental Importance
Garrett, G.P. and R.J. Edwards. 2003. New species of Gambusia (Cyprinodontiformes: Poeciliidae) from Del Rio, Texas. Copeia 2003(4):783-788.
Hubbs, C., R.J. Edwards, and G.P. Garrett. 2008. An annotated checklist of the freshwater fishes of Texas, with keys to identification of species. Texas Journal of Science, Supplement, 2nd edition 43(4):1-87.
Jelks, H.L., S.J. Walsh, N.M. Burkhead, S. Contreras-Balderas, E. Diaz-Pardo, D.A. Hendrickson, J. Lyons, N.E. Mandrak, F. McCormick, J.S. Nelson, S.P. Platania, B.A. Porter, C.B. Renaud, J.J. Schmitter-Soto, E.B. Taylor, and M.L. Warren, Jr. 2008. Conservation status of imperiled North American freshwater and diadromous fishes. Fisheries 33(8):372-407.