MS (Master of Science)
Date of Award
Committee Chair or Co-Chairs
Blaine W. Schubert
Blaine W. Schubert, Jim I. Mead, Steven C. Wallace
Paleokarst deposits from the Oligo-Miocene of northern Florida preserve undescribed herpetofaunal remains that fill important temporal and geographic gaps in our understanding of Cenozoic lizard evolution. Here I describe and discuss the non-anguimorph lizard diversity of the Brooksville 2 (Ar2) and Miller (He1) local faunas to test for patterns of regional and latitudinal provincialism in the contemporary North American record. Collectively, the sites are significant for documenting 1) extralimital occurrences of the tropical clades Anolis and Corytophaninae, 2) a substantial temporal range extension of the modern southeastern endemic Rhineuridae, 3) the earliest record of eublepharid gekkotans from North America, and 4) the early Miocene arrival of “cnemidophorine” teiids from South America. This work complements recent studies of older, Eocene lizards by others and lends paleontological support to aspects of the tropical conservatism hypothesis: lineages now confined to the tropics were present at higher latitudes when megathermal climates were more extensive.
Thesis - Open Access
Chovanec, Kevin, "Non-anguimorph Lizards of the Late Oligocene and Early Miocene of Florida and Implications for the Reorganization of the North American Herpetofauna" (2014). Electronic Theses and Dissertations. Paper 2384. http://dc.etsu.edu/etd/2384
Copyright by the authors.