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Type: Book chapter
Title: The origin, early history and diversification of Lepidosauromorph reptiles
Author: Evans, S.
Jones, M.
Citation: New Aspects of Mesozoic Biodiversity, 2010 / Bandyopadhyay, S. (ed./s), Ch.2, pp.27-44
Publisher: Springer
Issue Date: 2010
Series/Report no.: Lecture Notes in Earth Sciences; 132
ISBN: 978-3-642-10310-0
Statement of
Susan E. Evans and Marc E.H. Jones
Abstract: Lepidosauria was erected by Romer (1956) to encompass diapsids that lacked diagnostic archosaurian characters. The resulting assemblage was paraphyletic. In the intervening 50 years, new fossils and new phylogenetic approaches have transformed our concepts (e.g., Evans, 1980, 1984, 1988; Benton, 1985;Whiteside, 1986; Gauthier et al., 1988). Lepidosauria is now restricted to the last common ancestor of Squamata (lizards, snakes and amphisbaenians) and Rhynchocephalia (represented by Sphenodon), and all descendants of that ancestor (e.g., Gauthier et al., 1988). The clade is robustly diagnosed by hard and soft characters (e.g., Gauthier et al., 1988; de Braga and Rieppel, 1997; Evans, 2003; Hill, 2005) and is recognized by recent molecular phylogenies (e.g., Gorr et al., 1998; Rest et al., 2003; Townsend et al., 2004; Vidal and Hedges, 2005). Extant lepidosaurs are globally distributed with more than 7,000 species ranging from desert lizards to marine snakes. The fossil record provides evidence of their history and radiation but, despite advances, that record is patchy. It relies mainly on microvertebrate assemblages, supplemented by rare skeletons from lacustrine and other fine grained deposits. Inevitably, the record is geographically and geologically biased.
Rights: © Springer-Verlag Berlin Heidelberg 2010
RMID: 0030071978
DOI: 10.1007/978-3-642-10311-7_2
Appears in Collections:Genetics publications

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