�ber dr�sen�hnliche Gebilde der Epidermis am Kopfe von Typhlops braminus

Haas, G. v.

doi:10.1007/bf00586117

Cited by 3 publications

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“…Similar, possibly homologous structures have also been reported from Letheobia cf. caeca (Young & Wallach, ), and indeed from several other typhlopids (Haas, ; Gabe & Saint Girons, ), although these are generally much shorter (Young & Wallach, ). Young & Wallach () suggested that the sensillae function as mechanoreceptors, with a tactile role.…”

Section: Discussionmentioning

confidence: 99%

The bizarre skull of Xenotyphlops sheds light on synapomorphies of Typhlopoidea

et al. 2019

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The emerging picture of non-monophyly of scolecophidian snakes is increasingly indicative that fossorial lifestyle, myrmecophagous diet, and miniaturisation are powerful drivers of morphological evolution in squamate skulls. We provide a detailed description of the skull of Xenotyphlops grandidieri, with reference to the skulls of other scolecophidian snakes. The skull, which shows dramatic ventral inflection of the snout complex, is remarkably bizarre, and the mouth opening is more ventrally oriented than in other typhlopoids. The eyes are strongly reduced, and the enlarged and rather flat anterior head shield is covered in numerous sensillae. We put forward several potential explanations for the evolution of these unusual modifications. On the other hand, Xenotyphlops shares numerous synapomorphies with other typhlopoid snakes, including the highly specialized jaw mechanism. We argue that the key differences between the jaw mechanisms of Leptotyphlopidae, Anomalepididae, and Typhlopoidea provide compelling evidence for a strong role of convergence in the evolution of the scolecophidian bauplan, and these clades therefore cannot be interpreted as representative of ancestral anatomy or ecology among snakes. HighlightThe skull of the typhlopoid snake Xenotyphlops grandidieri is ventrally inflected, resulting in positional rearrangement of its snout bones and the formation of a robust anterior plate to the skull. It shares the unique rotational jaw mechanism seen in Gerrhopilidae and Typhlopidae, making this mechanism a synapomorphy of the superfamily Typhlopoidea. Differences in jaw morphology among major scolecophidian sensu lato lineages implicates convergent evolution in generating the blindsnake bauplan.Correspondence Mark D. Scherz, Zoologische Staatssammlung M€ unchen (ZSM-SNSB), M€ unchhausenstr. 21,

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Section: Discussionmentioning

confidence: 99%

The bizarre skull of Xenotyphlops sheds light on synapomorphies of Typhlopoidea

et al. 2019

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Glands

Quay¹

1986

Biology of the Integument

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Female Sex Pheromone in the Skin and Circulation of a Garter Snake

Garstka

Crews

1981

Science

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Serums and extracts of tissues from the female garter snake (Thamnophis sirtalis parietalis) each act as a pheromone and elicit male courtship behavior when applied to the back of another male. Since pheromonal activity is present in yolk and liver tissue of untreated females and can be induced with estrogen treatment in the serums and livers of males, the pheromone may be associated with the circulating yolk lipoprotein, vitellogenin.

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�ber dr�sen�hnliche Gebilde der Epidermis am Kopfe von Typhlops braminus

Cited by 3 publications

References 0 publications

The bizarre skull of Xenotyphlops sheds light on synapomorphies of Typhlopoidea

The bizarre skull of Xenotyphlops sheds light on synapomorphies of Typhlopoidea

Glands

Female Sex Pheromone in the Skin and Circulation of a Garter Snake

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