Phillips, A.J. and Siddall, M.E. 2009. Poly-paraphyly of Hirudinidae: Many lineages of medicinal leeches. BMC Evolutionary Biology, In Press.

Laufer, A., Siddall, M. E., and Graf, J. 2008. Characterization of the Digestive-Tract Microbiota of Hirudo orientalis, a European Medicinal Leech. Appl. Environmental Microbiology 74: 6151-6154

Rousset, V., Plaisance, L., Ersˇus, C., Siddall, M. E., and Rouse, G.W. 2008. Evolution of habitat preference in Clitellata (Annelida). Biological Journal of the Linnean Society, 95: 447-464

Oceguera, A. F. and Siddall, M. E. 2008. Placobdella lamothein. sp. (Hirudinea: Glossiphoniidae), sanguijuela nueva parásita de tortugas de agua dulce del Estado de México, México. Revista Mexicana de Biodiversidad 79: 135S- 139S

Borda E, Oceguera-Figueroa A, Siddall ME. 2008. On the classification, evolution and biogeography of terrestrial haemadipsoid leeches (Hirudinida: Arhynchobdellida: Hirudiniformes). Mol Phylogenet Evol. 46:142-54

Siddall, M. E., Trontelj, P., Utevsky, S.Y., Nkamany, M., and Macdonald III, K. S. 2007. Diverse molecular data demonstrate that commercially available medicinal leeches are not Hirudo medicinalis. Proc. Roy. Soc. London, B, 274(1617): 1481-1487.

Aguado, M.T., Nygren, A. and Siddall, M.E. 2007. Phylogeny of Syllidae (Polychaeta) based on combined molecular analysis of nuclear and mitochondrial genes. Cladistics 23:552-564

Hughes, J.L., and Siddall, M.E. 2007. A new species of leech from the New York Metropolitan Area. American Museum Novitates, 3578.

Siddall, M. E., Worthen, P. L. , Johnson, M., and Graf, J. 2007. Novel role for Aeromonas jandaei as digestive-tract symbiont of North American medicinal leeches. Applied Environmental Microbiology, 73: 655-658.