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Erik Ragsdale

Erik Ragsdale | Principal investigator


Alexander von Humboldt fellow, Max Planck Institute for Developmental Biology
Ph.D., University of California, Riverside (2009)

L111 Foundations in Biology: Diversity, Evolution, and Ecology (lecture, Fall)
L505 Evolution of Development (graduate seminar, Spring)
Z620 Systematics (graduate seminar, Spring)


Sofia Casasa

Sofia Casasa | Postdoctoral researcher

My research focuses on the developmental and genetic mechanisms, as well as evolutionary consequences, of phenotypic plasticity. Previously, my work used Onthophagus horned beetles to better understand the mechanisms of nutrition-responsive horn growth, as well as the potential role of plasticity in evolutionary diversification. In the Ragsdale lab, I investigate the function and evolution of polyphenism genes across diverse, predatory nematode species. [website]

Joana Projecto Garcia

Joana Projecto-Garcia | Postdoctoral researcher

I am a molecular biologist with a special interest in adaptation mechanisms of organisms facing extreme environmental conditions. Until now my research has focused on the evolutionary history and comparative function of respiratory adaptation mechanisms in invertebrates and vertebrates living in hypoxic environments (low oxygen availability). Following this interest in evolutionary solutions to stress conditions, my research in the Ragsdale lab focuses on the molecular evolution and comparative function of a polyphenism switch in predatory nematodes. [website]


Eleni Katsougia | Graduate student

I am a biochemist and biotechnologist. My research interests are generally in developmental mechanisms and how they evolve among species. My previous research focused on the development of teleosts, in which I examined the effect of rearing conditions on the ontogenesis of muscle genes in greater amberjack (Seriola dumerili), especially the processes of muscle hyperplasia and hypertrophy. I am a new member of the Ragsdale lab.

Sonia Messar | Graduate student

My research interests are in developmental biology, particularly the plasticity of traits and sexual dimorphism. My previous research focused on the allometry of female genital traits in Drosophila melanogaster ​and D. suzukii ​and whether the traits were resistant to variation in developmental nutrition, as compared to male genital traits. This was exciting research as when discussing sexual dimorphism, male traits are often at the forefront of research interest as opposed to female traits. I am a new member to the Ragsdale lab.


Katelynn Moore | Research assistant

Nematode husbandry



Marc Allison | X490 research undergraduate

Molecular characterization of polyphenism switch genes



Clayton Harry | X490 research undergraduate

Mapping of polyphenism mutants



Lab alumni





Department of Biology
Indiana University
915 E. 3rd Street, Myers Hall 100
Bloomington, IN 47405, USA


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