Steven A. Nadler

Dr. Steven Nadler

Position Title
Systematics and Evolutionary Biology of Nematodes, Department Chair

B.S., cum laude, Southwest Missouri State University, 1980-Biology.
M.S., Louisiana State University Medical Center, New Orleans, 1982-Medical Parasitology.
Ph.D., Louisiana State University Medical Center, New Orleans, 1985-Medical Parasitology.
NIH Postdoctoral Researcher, Experimental Parasitology Training Program, Center for Parasitology, University of Massachusetts, Amherst, 1985-1986.
NSF Postdoctoral Research Associate, Museum of Natural Science, Louisiana State University, Baton Rouge, 1986-1988.
Assistant/Associate Professor of Biological Sciences, Section of Ecology and Evolution, Department of Biological Sciences, Northern Illinois University, DeKalb, 1990-1996.
Associate Professor, Department of Nematology, University of California, Davis, 1996-2001.
Professor, Department of Entomology and Nematology, University of California, Davis, 2001-present.
Teaching Disciplines
Introduction to Nematology; Biology of Parasitism; Molecular phylogenetic analysis

Research in my laboratory focuses on using phylogenetic trees inferred from nucleotide sequence data as a framework to understand biodiversity, morphological evolution, molecular evolution, and certain aspects of disease ecology. Many of my research questions focus on nematodes (both free-living and parasitic), although I also study other groups of parasites, including acanthocephalans. The main source of my laboratory funding comes from the National Science Foundation, and these research grants are often collaborative, involving investigators at UC Riverside (Jim Baldwin, Paul De Ley) and other institutions. Much of my recent evolutionary research has focused on nematodes of the suborder Cephalobina, a group that includes numerous bacterial-feeding species in soil, but also some parasitic taxa hosted by invertebrates, and more rarely mammals.

Selected Publications:

  1. Nadler, S.A. 2002. Species delimitation and nematode biodiversity: phylogenies rule. Nematology 4:615-625.
  2. Nadler, S. A., R. A. Carreno, B. J. Adams, H. Kinde, J. G. Baldwin, and M. Mundo-Ocampo. 2003. Molecular phylogenetics and diagnosis of soil and clinical isolates of Halicephalobus gingivalis (Nematoda: Cephalobina: Panagrolaimoidea), an opportunistic pathogen of horses. International Journal for Parasitology 33:1115-1125.
  3. Carreno, R. A., and S. A. Nadler. 2003. Phylogenetic analysis of the Metastrongyloidea (Nematoda: Strongylida) inferred from ribosomal RNA gene sequences. Journal of Parasitology 89:965-973.
  4. Baldwin, J. G., S. A. Nadler, and B. J. Adams. 2004. Evolution of plant parasitism among nematodes. Annual Review of Phytopathology 42:83-105.
  5. Nadler, S. A., S. D’Amelio, M. Dailey, L. Paggi, S. Siu, and J. A. Sakanari. 2005. Molecular phylogenetics and diagnosis of Anisakis, Pseudoterranova and Contracaecum from northern Pacific marine mammals. Journal of Parasitology 91:1413-1429.
  6. García-Varela, M., and S. A. Nadler. 2006. Phylogenetic Relationships among Syndermata Inferred from Nuclear and Mitochondrial Gene Sequences. Molecular Phylogenetics and Evolution 40:61-72.
  7. Nadler, S. A., P. De Ley, M. Mundo-Ocampo, A. B. Smythe, S. P. Stock, D. Bumbarger, B. J. Adams, I. T. De Ley, A. Holovachov, and J. G. Baldwin. 2006. Phylogeny of Cephalobina (Nematoda): Molecular evidence for recurrent evolution of probolae and incongruence with traditional classifications. Molecular Phylogenetics and Evolution 40:696-711.
  8. Smythe, A. B., M. J. Sanderson, and S. A. Nadler. 2006. Nematode small subunit phylogeny correlates with alignment parameters. Systematic Biology 55:972-992.
  9. Nadler, S. A., R. A. Carreno, H. Mejía-Madrid, J. Ullberg, C. Pagan, R. Houston, and J.-P. Hugot. 2007. Molecular phylogeny of clade III nematodes reveals multiple origins of tissue parasitism. Parasitology 134:1421-1442.
  10. Kang, S., T. Sultana, K. S. Eom, N. Soonthornpong, S. A. Nadler and J.-K. Park. 2009. The mitochondrial genome sequence of Enterobius vermicularis (Nematoda: Oxyurida) - An idiosyncratic gene order and phylogenetic information for chromadorean nematodes. Gene 429:87-97.
  11. Nadler, S. A., and G. Pérez-Ponce de León. 2011. Cryptic species of parasites: implications for research programs in parasitology (Invited Review). Parasitology 138:1688-1709.
  12. Park, J.-K., T. Sultana, S.-H. Lee, S. Kang, H. K. Kim, G.-S. Min, K. S. Eom, and S. A. Nadler. 2011. Monophyly of clade III nematodes is not supported by phylogenetic analysis of complete mitochondrial genome sequences. BMC Genomics 12:392.