Abstract:
:Snakes represent one of the most ubiquitous and successful groups of terrestrial vertebrates; however, many aspects of their evolutionary relationships remain uncertain. Previous research, which utilized morphological and immunological data, has not resolved the origin of snakes or clearly delineated the relationships between snakes and other lizards. A DNA sequence data set from the mitochondrial ND4 gene and the histidine, serine, and leucine tRNAs has been generated for use in the examination of these relationships. Parsimony analyses employing multiple outgroups resolve snakes within the lizard clade. Varanus is the sister group to the snakes in 81% of bootstrap replications using Bos as the outgroup specified, 85% using Trachemys, 57% using Alligator, and 80% using all three outgroups. The primitive, fossorial snake genera Leptotyphlops and Typhlops are basal to the other snakes and provide tentative molecular evidence in support of a fossorial or subfossorial origin of limblessness for the suborder Serpentes.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Forstner MR,Davis SK,Arévalo Edoi
10.1006/mpev.1995.1010subject
Has Abstractpub_date
1995-03-01 00:00:00pages
93-102issue
1eissn
1055-7903issn
1095-9513pii
S1055-7903(85)71010-Xjournal_volume
4pub_type
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