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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The anatomy of the upper cretaceous snake Najash rionegrina Apesteguia & Zaher, 2006, and the evolution of limblessness in snakes

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Author(s):
Zaher, Hussam [1] ; Apesteguia, Sebastian [2] ; Agustin Scanferla, Carlos [3]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Museu Zool, BR-04263000 Sao Paulo - Brazil
[2] Univ Maimonides, Fdn Hist Nat Felix Azara CEBBAD, RA-1405 Buenos Aires, DF - Argentina
[3] Museo Argentino Ciencias Nat Bernardino Rivadavia, Lab Anat Comparada & Evoluc Vertebrados, RA-1405 Buenos Aires, DF - Argentina
Total Affiliations: 3
Document type: Journal article
Source: ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY; v. 156, n. 4, p. 801-826, AUG 2009.
Web of Science Citations: 38
Abstract

Najash rionegrina Apesteguia \& Zaher, 2006, a terrestrial fossil snake from the Upper Cretaceous of Argentina, represents the first known snake with a sacrum associated with robust, well-developed hind limbs. Najash rionegrina documents an important gap in the evolutionary development towards limblessness, because its phylogenetic affinities suggest that it is the sister group of all modern snakes, including the limbed Tethyan snakes Pachyrhachis, Haasiophis, and Eupodophis. The latter three limbed marine fossil snakes are shown to be more derived morphologically, because they lack a sacrum, but have articulated lymphapophyses, and their appendicular skeleton is enclosed by the rib cage, as in modern snakes. (AU)

FAPESP's process: 02/13602-4 - Evolution of the southeastern Brazilian reptile fauna from Cretaceous: paleontology, phylogeny and biogeography
Grantee:Hussam El Dine Zaher
Support type: BIOTA-FAPESP Program - Thematic Grants