Browsing by Subject "morphological"
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Item Molecular systematics of bonneted bats (Molossidae: Eumops) based on mitochondrial and nuclear DNA sequences(2012-05-12) Bartlett, Sarah; Bartlett,Sarah Nichole; Ammerman, Loren K.; Maxwell, Terry; Strenth, Ned; Pierce, Jason; Angelo State University. Department of Biology.Previous understanding of the relationships among the species of bats in the genus Eumops has been based on phenetic and cladistic analyses of morphological data. The objective of this study was to construct a phylogeny of the bats within the genus Eumops using DNA sequence data from 2 mitochondrial genes (cytochrome b and nicotinamide adenine dinucleotide dehydrogenase subunit 1) and 1 nuclear locus (β-fibrinogen intron 7) for members of Eumops and outgroups from the family Molossidae. Data for each locus were analyzed separately using maximum-likelihood and Bayesian methods then were combined for complete data analyses using Bayesian Inference and Bayesian concordance analysis on a total of 2715 base pairs. Our results conflicted with some of the relationships proposed in previous morphological studies. Minor disagreements existed between the individual mitochondrial and nuclear data sets. However, the monophyly of the genus was significantly supported in all of the analyses.Item Morphological and molecular variation in Townsend's big-eared bat (Corynorhinus townseendii) in West Texas(2012-05-12) Tipps, Teresita; Tipps, Teresita Marie; Ammerman, Loren K.; Dowler, Robert C.; Negovetich, Nick J.; Bankston, Tom; Angelo State University. Department of Biology.Previous studies of Townsend's big-eared bat (Corynorhinus townsendii) from Big Bend National Park (Brewster Co.) have been limited and inconclusive regarding the expected subspecific identity of specimens from this region. Furthermore, we observed that several specimens of from this region displayed morphological characteristics of both the Mexican big-eared bat (C. mexicanus) and C. townsendii. Thus, the goals of this study were to use molecular data to determine the specific and subspecific affinity of the specimens found in this region and to illuminate possible morphological variation within the molecular lineages recovered in West Texas specimens. Based on molecular analyses there was support for the presence of a single subspecies, C. t. australis, throughout West Texas. Evaluation of morphological data from these same specimens showed that no discrete characteristics were accurate in delineating C. townsendii from C. mexicanus, confirming substantial morphological variation within C. t. australis specimens from West Texas.