Emydidae

The European pond turtle Emys orbicularis, one of the few emydids found outside the Americas. Photo by Nicola Maraspini.


Belongs within: Procoelocryptodira.

The Emydidae are a family of mostly aquatic tortoises found primarily in the Americas. The family includes the red-eared slider Trachemys scripta which has, through the pet trade, become an invasive species in many parts of the world.

Synapomorphies (from Gaffney & Meylan 1988): Batagurine process absent, no pterygoid-basioccipital contact; angular usually reaching Meckel's cartilage; double articulation of fifth and sixth cervical; chromosome number 2n = 50.

<==Emydidae
    |  i. s.: Glyptemys CP03
    |           |--G. insculpta CP03
    |           `--G. mulhenberghii CP03
    |--Emydinae GM88
    |    |--Clemmys GM88
    |    |    |--C. guttata W-CL06
    |    |    `--C. insculpta W-CL06
    |    `--+--+--Emydoidea GM88
    |       |  `--Terrapene GM88
    |       |       |--T. carolina W-CL06
    |       |       |--T. coahuila CP03
    |       |       `--T. ornata CP03
    |       `--Emys GM88
    |            |--E. blandinghii CP03
    |            |--E. cibollensis Cope 1876 C76
    |            |--E. euthnetus C76
    |            |--E. gravis C76
    |            |--E. lativertebralis Cope 1876 C76
    |            |--E. marmorata CP03
    |            |--E. orbicularis [=Testudo orbiculata] K08
    |            |--E. testudineus C76
    |            `--E. vyomingensis C76
    `--Deirochelyinae [Deirochelyoidae] GM88
         |--Malaclemmys terrapin GM88, W-CL06
         |--Graptemys GM88
         |    |--G. barbouri CP03
         |    |--G. ernsti CP03
         |    |--G. flamaculata CP03
         |    |--G. geographica CP03
         |    |--G. gibbonsi CP03
         |    |--G. inornata CP03
         |    |--G. kohni CP03
         |    |--G. nigrinoda CP03
         |    |--G. ouachitensis WA98
         |    |--G. pseudogeographica WA98
         |    |--G. pulchra CP03
         |    `--G. versa CP03
         `--+--Chrysemys GM88
            |    |--C. picta W-CL06
            |    `--C. scripta B81
            `--+--Deirochelys reticularia GM88, CP03
               `--+--Pseudemys GM88
                  |    |--P. alabamensis CP03
                  |    |--P. concinna CP03
                  |    |--P. floridana GM88
                  |    |--P. nelsoni CP03
                  |    |--P. rubriventris CP03
                  |    `--P. scripta B81
                  `--Trachemys GM88
                       |--T. decorata CP03
                       |--T. dorbigny CP03
                       |--T. grayi CP03
                       |--T. scripta W-CL06
                       |    |--T. s. scripta W-CL06
                       |    |--T. s. elegans W-CL06
                       |    `--T. s. trootsi W-CL06
                       |--T. stejneri CP03
                       `--T. terrapen CP03


REFERENCES

[B81] Brooks, D. R. 1981. Raw similarity measures of shared parasites: an empirical tool for determining host phylogenetic relationships? Systematic Zoology 30 (2): 203-207.

[CP03] Claude, J., E. Paradis, H. Tong & J.-C. Auffray. 2003. A geometric morphometric assessment of the effects of environment and cladogenesis on the evolution of the turtle shell. Biological Journal of the Linnean Society 79: 485-501.

[C76] Cope, E. D. 1876. Report upon the extinct Vertebrata obtained in New Mexico by parties of the expedition of 1874. Geographical Surveys West of the One Hundredth Meridian 4(2): i-iv, 1-370.

[GM88] Gaffney, E. S., & P. A. Meylan. 1988. A phylogeny of turtles. In The Phylogeny and Classification of the Tetrapods, vol. 1. Amphibians, Reptiles, Birds (M. J. Benton, ed.) pp. 157-219. Clarendon Press: Oxford.

[K08] Korsós, Z. 2008. History of the Herpetological Collection of the Hungarian Natural History Museum. Annales Historico-Naturales Musei Nationalis Hungarici 100: 37-93.

[WA98] Walker, D., & J. C. Avise. 1998. Principles of phylogeography as illustrated by freshwater and terrestrial turtles in the southeastern United States. Annual Review of Ecology and Systematics 29: 23-58.

[W-CL06] Watkins-Colwell, G. J., T. A. Leenders, B. T. Roach, D. J. Drew, G. Dancho & J. Yuckienuz. 2006. New distribution records for amphibians and reptiles in Connecticut, with notes on the status of an introduced species. Bulletin of the Peabody Museum of Natural History 47 (1-2): 47-62.

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