Clemmys is a genus of turtles currently containing a single extant species, the spotted turtle (Clemmys guttata).
Taxonomy In the past, several other species were included in the genus, including a number of fossil species. DNA analysis has restricted the genus to containing only the spotted turtle.Feldman, C.R. and J.F. Parham. (2002). Molecular phylogenetics of Emydine turtles: taxonomic revision and the evolution of shell kinesis. Molecular Phylogenetics and Evolution 22:388-398.Spinks, P.Q. and H.B. Shaffer. (2009). Conflicting Mitochondrial and Nuclear Phylogenies for the Widely Disjunct Emys (Testudines: Emydidae) Species Complex, and What They Tell Us about Biogeography and Hybridization. Systematic Biology 58(1):1-20. Fossil species are now restricted to the Neogene of North America as far back as the Miocene.
Extant species formerly in Clemmys Wood turtle - now Glyptemys insculpta Bog turtle - now Glyptemys muhlenbergii Western pond turtle - now Actinemys marmorata
Fossil species †Clemmys hesperia Hay, 1903 - Pliocene †Clemmys owyheensis Brattstrom & Sturn, 1959 - Miocene (Hemphillian)
References