Kaxa-dortoka

Kaxa-dortoka (Terrapene) Emydidae familiako dortoken generoa da, Ipar Amerikan jatorria duena.

Taxonomia 
 Terrapene carolina (Linnaeus, 1758) (espezie tipoa)
 Terrapene carolina bauri Taylor, 1895
 Carolinako kaxa-dortoka, Terrapene carolina carolina (Linnaeus, 1758)
 Terrapene carolina major (Agassiz, 1857)
 Terrapene carolina mexicana (Gray, 1849)
 Terrapene carolina putnami O.P. Hay, 1906 (galdua)
 Terrapene carolina triunguis (Agassiz, 1857)
 Terrapene carolina yucatana (Boulenger, 1895)
 Terrapene coahuila Schmidt & Owens, 1944
 Terrapene nelsoni Stejneger, 1925
 Terrapene nelsoni klauberi Bogert, 1943
 Terrapene nelsoni nelsoni Stejneger, 1925
 Terrapene ornata, (Agassiz, 1857)
 Terrapene ornata ornata (Agassiz, 1857)
 Terrapene ornata luteola H.M. Smith & Ramsey, 1952

Erreferentziak

Kanpo estekak 

Emydidae
Konpainia-animaliak
Ipar Amerikako fauna