Ocadia

Ocadia
Chinese Stripe-necked Turtle
Ocadia sinensis
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Testudines
Suborder: Cryptodira
Superfamily: Testudinoidea
Family: Geoemydidae
Subfamily: Batagurinae
Genus: Ocadia
Gray, 1870

Ocadia is a genus of turtles in the family Geoemydidae (formerly called Bataguridae). It is sometimes included in Mauremys.[1] It contains the following species:

O. sinensis is known to hybridize with most other Geoemydidae genera.[2] Hybridization runs rampant in that family; while it is possible that perfectly valid species could arise this way, the other Ocadia species are apparently only known from a few specimens each, all of them purchased from a turtle dealer in Hong Kong:

The supposed species "Ocadia glyphistoma", described by Mccord & Iverson in 1994 and supposedly from southern Guangxi and northern Vietnam, is a hybrid between a male O. sinensis and a female Vietnamese pond turtle (Mauremys annamensis).[3] This "species" seems to be naturally occurring in central Vietnam, but is occasionally also bred for the pet trade in southern Chinese turtle farms.[4]

Philippen's striped turtle ("Ocadia philippeni"), described by Mccord & Iverson in 1992 and said to occur on Hainan, also proved to be a hybrid, between a male O. sinensis and a female Cuora trifasciata.[5] It is not proven but likely that this "species" also originates from both the wild and is bred in farms.

In 2013, a Miocene Japanese fossil species of the same genus was described, Ocadia tanegashimensis Takahashi & al.,[6] which adds itself to the already known Pleistocene O. nipponica, from the same country.

References

  1. ↑ Honad et al. (2002), Feldman & Parham (2004), Spinks et al. (2004)
  2. ↑ see Vetter & Van Dijk (2006)
  3. ↑ Spinks et al. (2004), Stuart & Parham (2006)
  4. ↑ Blanck et al. (in prep.)
  5. ↑ Stuart & Parham (2006)
  6. ↑ Akio Takahashi, Kimihiko Ōki, Takahiro Ishido, & Ren Hirayama, 2013, "A new species of the genus Ocadia (Testudines: Geoemydidae) from the middle Miocene of Tanegashima Island, southwestern Japan and its paleogeographic implications"
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