Rostral horn evolution among agamid lizards of the genus Ceratophora endemic to Sri Lanka.
The first phylogenetic hypothesis for the Sri Lankan agamid lizard genus Ceratophora is presented based on 1670 aligned base positions (472 parsimony informative) of mitochondrial DNA sequences, representing coding regions for eight tRNAs, ND2, and portions of ND1 and COI. Phylogenetic analysis reveals multiple origins and possibly losses of rostral horns in the evolutionary history of Ceratophora. Our data suggest a middle Miocene origin of Ceratophora with the most recent branching of recognized species occurring at the Pliocene/Pleistocene boundary. Haplotype divergence suggests that an outgroup species, Lyriocephalus scutatus, dates at least to the Pliocene. These phylogenetic results provide a framework for comparative studies of the behavioral ecological importance of horn evolution in this group.
Schulte
James A
JA
Department of Biology, Washington University, St. Louis, Missouri 63130, USA. schulte@biology.wustl.edu
Macey
J Robert
JR
Pethiyagoda
Rohan
R
Larson
Allan
A
D000818:Animals; D005075:Biological Evolution; D004272:DNA, Mitochondrial / Q000235:genetics; D014644:Genetic Variation; D006733:Horns / Q000033:anatomy & histology*; D008116:Lizards / Q000033:anatomy & histology* / Q000145:classification / Q000235:genetics*; D008957:Models, Genetic; D010802:Phylogeny; D013045:Species Specificity; D013188:Sri Lanka; D013997:Time Factors
D004272:DNA, Mitochondrial