Thesis (Ph.D.)--Tufts University, 1996. / Adviser: Frances S. Chew. Submitted to the Dept. of Biology. Includes bibliographical references (leaves 173-184). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

Honors Project--Smith College, Northampton, Mass., 2009. / Includes bibliographical references (p. 45-48)

Thesis (M.S.)--Missouri State University, 2008. / "August 2008." Includes bibliographical references (leaves 70-81). Also available online.

Thesis--Catholic Univ. of America.

Thesis (Ph. D.)--Florida State University, 2006. / Advisor: Henry W. Bass, Florida State University, College of Arts and Sciences, Dept. of Biological Science. Title and description from dissertation home page (viewed June 15, 2006). Document formatted into pages; contains x, 83 pages. Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 107-117). Also available on the World Wide Web.

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The 16 species and subspecies of the Ambystomidae of the United States are placed into six groups according to their throat morphology as follows: The Dicamptodon group, the Rhyacotriton group, the A. annulatum-A. cingulatum group, the A. gracile-A. jeffersonianum-A. mabeei-A. macrodactylum-A. maculatum group, the A. talpoideum group, the A. opacum-A. texanum group, and the A. rosaceum-A. t. tigrinum-A. t. melanostictum-A. t. nebulosum group. Dicamptodon appears to be the most primitive group and Rhyacotriton the most specialized. Based on the morphology of the throat region it is suggested that A. rosaceum be placed in the tiger salamander group as a subspecies of A. tigrinum. The results of this investigation support the hypothesis that Ambystomidae is primitive to Salamandridae and to Plethodontidae. The findings which have led to this conclusion are based upon the protrusibility of the tongue, and upon the structure and presence of the epibranchial, otoglossal, second radial, and second basibranchial cartilages of the three families.

Analysis of hemogobins were conducted on animals of the species Ambystoma tigrinum. Separation of hemoglobin types was performed with a Carboxy-methyl-cellulose column (6 X 50 mm.) and pH gradient (pH 6 thru 8) of .01 M phosphate buffer. The hemoglobins in the effluent were detected and analysed with a micro-flow cell in a Beck-man DB-G spectrophotometer attached to a Photovolt Varicord 43 recorder. Two major components of hemoglobin were observed: larval and adult. These two components varied in concentration with the stage of development of the individual. In addition, it was noted that minor peaks ansd shoulders appeared on each peak wich were consistant and characteristic for each major hemoglobin type.