Contribución al conocimiento sobre la Taxonomía, distribución geográfica y ecología de la Tortuga "Bache" (Chelydra Serpentina Acutirostris) Contribución al conocimiento sobre la Taxonomía, distribución geográfica y ecología de la Tortuga "Bache" (Chelydra Serpentina Acutirostris)

Medem Federico
1977 Caldasia  
1. Studies on the external morphological characters of Chelydra serpentina acutirostris are presented, the principal scope of which contributes to the knowledge about the taxonomic status of this form considered as a valid subspecies.2. These characteristics are compared with those of the other three subspecies, principally with Chelydra serpentina rossignonii.3. Based on 18 specimens of acutirostris, mainly from Colombia, and 16 of rossignonii, mainly from Honduras, certain characters are
more » ... characters are re-evaluated.4. The type specimens of the four living representatives of the genus Chelydra, commonly known as "Snapping Turtles", are as follows:a) Chelydra serpentina serpentina (Linnaeus), 1758.Holotype: Originally deposited at the Museum Adolphi FridericiRegis (Museum Drottningholmense), according to the Prodromus Stockholm, 1764, tom. II, p. 16, but presently lost (fide Andersson, 1900, pp. 4, 23).b) Chelydra serpentina acutirostris Peters, 1962.Holotype: ZBM 4500, hatchling, vicinity of Guayaquil, Ecuador,Carl Reiss.c) Chelydra serpentina rossignonii (Bocourt), 1868.Syntypes: MNHNP 1501, 1501 A, hatchlings, swamp of Panzos,vicinity of Rio Polochic, Guatemala, and MNHNP 1230, hatchling,Mexico, without exact locality, datum and collectors.d) Chelydra serpentina osceola Stejneger, 1918.Holotype: USNM 10369, Clearwater, Pinellas County, Florida,United States, September, 1879, S. T. Walker.5. A redescription of the holotype of acutirostris is presented, and comparisons with the syntypes of rossignonii made.6. Unfortunately, either the holotype or the syntypes all were described from hatchlings, many of the external morphological characters of which are markedly different from those of adults.7. Certain external characters which are traditionally considered as constant in the keys of classification, although in reality they are not, but rather show a considerable variation, therefore they are of no taxonomic value i [...]
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