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Ludwig, M., Auer, M., & Fritz, U. (2007). Phalangeal formulae of geoemydid terrapins (batagur, callagur, hardella, heosemys, kachuga, orlitia, pangshura, rhinoclemmys) reflect distinct modes of life. Amphibia-Reptilia, 28(4), 574–576. 
Added by: Admin (14 Aug 2008 20:33:45 UTC)   Last edited by: Beate Pfau (19 Jul 2009 12:14:54 UTC)
Resource type: Journal Article
DOI: 10.1163/156853807782152570
BibTeX citation key: Ludwig2007
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Categories: General
Keywords: Batagur, Batagur baska, Batagur borneoensis, Batagur dhongoka, Batagur kachuga, Clemmys, Emydidae, Geoemydidae, Hardella, Heosemys, Heosemys depressa, Heosemys grandis, Heosemys spinosa, Orlitia, Orlitia borneensis, Pangshura, Pangshura smithii, Pangshura tentoria, Rhinoclemmys, Rhinoclemmys annulata, Rhinoclemmys diademata, Rhinoclemmys funerea, Rhinoclemmys melanosterna, Rhinoclemmys pulcherrima, Rhinoclemmys punctularia, Rhinoclemmys rubida, Schildkröten = turtles + tortoises, Systematik = taxonomy
Creators: Auer, Fritz, Ludwig
Collection: Amphibia-Reptilia
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Batagur baska Callagur borneoensis Hardella thurji Heosemys depressa grandis spinosa Kachuga dhongoka kachuga Orlitia borneensis Pangshura smithii tentoria Rhinoclemmys diademata funerea melanosterna punctularia annulata pulcherrima rubida
Using radiographies of manus and pes of 133 geoemydid terrapins of nine highly aquatic species (genera Batagur, Callagur, Hardella, Kachuga, Orlitia, Pangshura), four aquatic Rhinoclemmys species, three semiterrestrial Heosemys species, and three terrestrial Rhinoclemmys species, we confirm a correlation between mode of life and phalangeal formulae. Terrestrial geoemydid species tend to have lost phalanges or entire digits, while highly aquatic species with extensive toe webbing generally have retained the full phalangeal number in manus and pes. Phalangeal formulae of species that are not so strictly adapted to aquatic environments, and having less extensive toe webbing, are intermediate, like in the studied semiterrestrial species.
Added by: Admin  Last edited by: Beate Pfau
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