Ontogeny of the skull, lower jaw, and hyobranchial skeleton ofHypogeophis rostratus (Amphibia: Gymnophiona: Caeciliidae) revisited
2006; Wiley; Volume: 267; Issue: 8 Linguagem: Inglês
10.1002/jmor.10454
ISSN1097-4687
Autores Tópico(s)Animal Behavior and Reproduction
ResumoJournal of MorphologyVolume 267, Issue 8 p. 968-986 Article Ontogeny of the skull, lower jaw, and hyobranchial skeleton of Hypogeophis rostratus (Amphibia: Gymnophiona: Caeciliidae) revisited Hendrik Müller, Corresponding Author Hendrik Müller [email protected] Department of Zoology, The Natural History Museum, London SW7 5BD, UK; and Institute of Biology, Leiden University, 2311 GP, Leiden, The NetherlandsDepartment of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, UKSearch for more papers by this author Hendrik Müller, Corresponding Author Hendrik Müller [email protected] Department of Zoology, The Natural History Museum, London SW7 5BD, UK; and Institute of Biology, Leiden University, 2311 GP, Leiden, The NetherlandsDepartment of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, UKSearch for more papers by this author First published: 12 May 2006 https://doi.org/10.1002/jmor.10454Citations: 31AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Few detailed descriptions of the development of the head skeleton in caecilian amphibians are available. One of those is the work of Marcus and students (e.g., Gehwolf [1923] Z Anat Entwick 68:433–454; Marcus [1933] Anat Anz 80:142–146; Marcus et al. [1935] Gegenbaurs Morphol Jb 76:375–420) on the morphology and development of the skull, lower jaw, and hyobranchial skeleton in the Seychellean caeciliids Hypogeophis rostratus and Grandisonia alternans. These workers described a high number of individual ossifications that fuse during ontogeny to form the adult skull. Although later studies have doubted the generality of those observations, the work of Marcus and his students has been hugely influential in subsequent studies of caecilian skull morphology and amphibian evolution. Based on new observations on an ontogenetic series of 32 sectioned and cleared and stained specimens, ranging from the beginning of chondrification to the adult, the development of the skull, lower jaw, and hyobranchial skeleton of H. rostratus are described. The new results are largely incompatible with those of Marcus and students and no evidence for several of the reported ossifications, including supra-, infra-, and basioccipital, epiotic, pleurosphenoid, preethmoid, posterior vomer, prepalatine, quadratojugal, postparietal, second coronoid, supraangular, and complementare, is found. It is argued that most of Marcus et al.'s reports of nonexistent ossifications are based on false phylogenetic preconception, misinterpretation of the observed morphology, and technical error. Data on the ossification sequence of the skull and lower jaw in H. rostratus are provided and briefly compared to published information on Dermophis mexicanus and Gegeneophis ramaswamii. J. 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