Laboratory of Integrative and Comparative Herpetology
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​Robert E. Espinoza, Ph.D.

Professor of Biology
Department of Biology
California State University, Northridge
18111 Nordhoff Street
Northridge, California 91330-8303, USA
Email: [email protected]
Faculty Office: (818) 677-4980
​Dean's Office: (818) 677-2004
​Laboratory: (818) 677-5737


Current MS Students

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Ricardo G. Gibert

Gecko wars: Competitive behavioral displacement among co-occuring invasive house geckos

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Eva E. Greco

Have Island Fence Lizards adjusted their thermal biology to compensate for the cooler climates of the Northern Channel Islands?

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Anastasia L. Shimek
Old lizards, new insights: Identifying the drivers of millennial-scale trait evolution of Island Night Lizards (Xantusia riversiana) on the Channel Islands




Master's Student Alumni

Jack K. Dirck (MS 2026)
Human-mediated dispersal results in multiple colonizing pathways for a continentally introduced gecko
Sean P. Farmer (MS 2026)
A mechanistic approach to demystifying the paradoxical rarity of the Common Garter Snake (Thamnophis sirtalis) in Southern California
Trevor C. Ruppert (MS 2023)
Identifying the physiological limitations of dispersal and persistence for an invasive amphibian (Xenopus laevis)
Matthew M. Dickson (MS 2022)
Getting comfortable in your own skin: Rapid adaptive change in the epidermis of introduced Mediterranean House Geckos
Juan H. Aragon y Traverso (MS 2021)
Widow wars: testing the mechanisms underlying invasion success of a globally invasive spider
Dillon J. Monroe (MS 2020)
Challenges to defining the niche of an invasive human-commensal gecko
Anthony J. Cobos (MS 2019)

A test of Gollum's rule: comparative morphology, performance, and energetics of cave- and forest-dwelling Malaysian Cyrtodactylus geckos

Rachel S. Rhymer (MS 2016)
Parents, predators, or poop? Testing the forces selecting for aggregation in a herbivorous lizard
Alissa N. [Luken] de Koning (MS 2015)
Evolution of temperature-dependent sprint performance in nocturnal and secondarily diurnal geckos
Jason R. Warner (MS 2015)
Comparative cold-hardiness capacities of South American lizards in the genus Liolaemus

Beck A. Wehrle (MS 2014)
Going green: The acquisition of fiber-fermenting microbes by hatchling Green Iguanas (Iguana iguana)
Denita M. Weeks (MS 2014)
Implications of global warming for the world's southernmost gecko
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Raymond A. Hernandez (MS 2009)
Can omnivores be diet specialists? Adaptability of gut form and function in an omnivorous lizard
Diana L. Andres (MS 2005)
Consequences of diet switching for digestive function and the gut endosymbiont community for an herbivorous lizard
Jennifer R. [Weist] Lancaster (MS 2005)
Why do banded geckos band? Identifying the causes and benefits of diurnal aggregation in Coleonyx variegatus
Kamelia [Fallahpour] Algiers (MS 2004)

The role of female breeding coloration in the behavior and mate selection of male leopard lizards (Gambelia wislizenii)
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​Department of Biology
College of Science and Mathematics
California State University, Northridge

Northridge, California 91330-8303, USA
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