Vietnamese three-striped box turtle

The Vietnamese three-striped box turtle or green rice turtle (Cuora cyclornata) is a species of the Southeast Asian genus Cuora (family Geoemydidae). It is distributed from the extreme southern part of the Chinese Guangxi province southwards to central Vietnam and central Laos. This species reaches up to 30 cm straight carapace length and is thus the largest Cuora species. Due to demand of traditional Chinese medicine, this species is nearly extinct in the wild, but is readily bred on Chinese turtle farms.[1] Extremely high prices are paid for this species in China. It can be distinguished from Cuora trifasciata by its larger size and generally more oval or rounder shell, which is usually also flatter, a white, pink, or orange chin, and head coloration with an orange-brownish-olive dorsal head pattern and less black pigment.

Vietnamese three-striped box turtle

Critically Endangered  (IUCN 2.3)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Superfamily: Testudinoidea
Family: Geoemydidae
Genus: Cuora
Species:
C. cyclornata
Binomial name
Cuora cyclornata
Blanck, Mccord & Le, 2006

Subspecies

Recognized subspecies:[2]

  • Central Vietnamese three-striped box turtle (C. c. cyclornata): Occurring in Central Vietnam and adjacent Laos, this subspecies can easily be distinguished from Cuora trifasciata and C. c. meieri by its orange chin, its round carapace appearance, the Cuora mccordi/Boletus-like plastral pattern (i.e. a generally large black blotch extending from the anal scutes to the pectorals, in C. trifasciata and C. c. meieri extending to the gulars) with a thin black vertical black stripe along the pectoral-humeral suture only and two separated, black, longitudinal bars on the gular scutes. This subspecies can reach a carapace length of up to 25 cm; males are smaller than females (as usual in Cuora species).
  • Northern Vietnamese or Meiers three-striped box turtle (C. c. meieri): Occurring in extreme southwestern Guangxi Province, China and adjacent northern Vietnam, this subspecies can be differentiated from C. c. cyclornata and C. trifasciata by its oval shell shape, a white to pinkish chin, rounded humeral-pectoral sutures, and a filled Boletus plastral pattern. This subspecies can reach a carapace length of up to 30 cm; males are smaller than females.
  • Female C. c. cyclornata
  • Plastron C. c. cyclornata
  • Female C. c. meieri
  • Plastron C. c. meieri
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References
  1. Zhou, T.; McCord, W.; Blanck, T. & Li, P. P. (2007). "Cuora trifasciata and Cuora cyclornata - captive breeding in China". Reptilia (GB). (50): 68-73.
  2. Blanck, T.; Mccord, W. P. & Le, M. (2006). "On the Variability of Cuora trifasciata". Edition Chimaira. 153 pp.
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