Date of Award

Summer 8-2016

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Biology

First Advisor

Josiah H. Townsend

Second Advisor

Joseph E. Duchamp

Third Advisor

Jeffery L. Larkin

Abstract

Tropical climbing salamanders (Plethodontidae: Bolitoglossa) are a diverse and species-rich radiation of salamanders throughout the Neotropics. Herein, I assess the taxonomy of the Bolitoglossa subgenus, Magnadigita, endemic to the cloud forests of Honduras. This thesis involves the development of a genetic barcoding dataset for rapid classification of species, and the identification of candidate species based on divergent mitochondrial genes. I identified two species that had strong phylogenetic structure: B. porrasorum and B. celaque. I assessed three divergent populations of B. porrasorum, and found that these populations had significantly distinct morphological and genetic traits that support my hypothesis of these populations representing distinct species. In addition, I used morphology, osteology, and phylogenetics to assess the two clades of B. celaque. I found significant divergences across these traits, and suggest B. celaque is a complex of two distinct species. Finally, I suggest appropriate taxonomic revisions that should be made to the Honduran Magnadigita.

Available for download on Friday, September 28, 2018

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