Literaturdatenbank
Literaturdatenbank |
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Seidel, M. E., Stuart, J. N., & Degenhardt, W. G. (1999). Variation and species status of slider turtles (emydidae, trachemys) in the southwestern united states and adjacent mexico. Herpetologica, 55(4), 470–487.
Added by: Admin (14 Aug 2008 22:46:55 UTC) |
| Resource type: Journal Article BibTeX citation key: Seidel1999 View all bibliographic details  |
Categories: General Keywords: Emydidae, invasive Arten = invasive species, Schildkröten = turtles + tortoises, Systematik = taxonomy, Trachemys, Trachemys gaigeae, Trachemys scripta Creators: Degenhardt, Seidel, Stuart Collection: Herpetologica |
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| Abstract |
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Examination of specimens and locality data of Trachemys scripta elegans, T. s. gaigeae, and T. s. cataspila in the southwestern United States and northeastern Mexico indicates these three taxa are primarily allopatric. Morphometric analysis further indicates that these forms are distinct, without evidence of intergradation. Little or no overlap of diagnostic marking patterns was detected, except for variation in the supratemporal stripe of T. s. elegans in the lower Rio Grande and Pecos River. Hemoglobin (analyzed by isoelectric focusing) of sliders in those drainages was also variable. Although limited introgression between T. s. elegans and T. s. gaigeae or T. s. cataspila might be possible in the lower Rio Grande, specimens of T. s. elegans from the area are not intergrades, and therefore we do not consider them to be conspecific with the other forms. Six specimens from the upper Rio Grande are possibly hybrids of elegans and gaigeae but their status is problematic. The appropriate species designations of gaigeae and cataspila await a broad phylogenetic analysis, including all forms in the T. scripta complex.
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