Four-eyed turtle

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Four-eyed turtle
Sacalia quadriocellata.jpg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Superfamily: Testudinoidea
Family: Geoemydidae
Subfamily: Geoemydinae
Genus: Sacalia
Species: S. quadriocellata
Binomial name
Sacalia quadriocellata
Siebenrock, 1903
  • Clemmys bealii var. quadriocellata Siebenrock, 1903
  • Clemmys quadriocellata Pope, 1934
  • Clemmys bealei quadriocellata
    Bourret, 1941
  • Clemmys beali insulensis Adler, 1962
  • Sacalia quadriocellata
    Pritchard, 1979
  • Sacalia bealei quadriocellata
    C. Ernst & R. Barbour, 1989
  • Sacalia quadriocellata quadriocellata Artner, 2003
  • Sacalia quadriocellata insularis [sic]
    Artner, 2003 (ex errore)

The four-eyed turtle[2] (Sacalia quadriocellata) is a reptile of the order Testudines. Its name refers to two bright yellow or green spots that occur on the back of its head that can look like another pair of eyes.

Geographic range[edit]

This species of turtle occurs in southern China and Hainan, in the Annamite Mountains and northeastern region of Laos, and in the mountains of northern and central Vietnam.[3]


A male of this species has successfully produced hybrids with the Chinese pond turtle in captivity. Given that the "four-eye" pattern is inherited by these hybrids, it seems well possible that the mysterious Chinese false-eyed turtle (Sacalia pseudocellata) is actually based on a hybrid specimen.[4]


The four-eyed turtle can grow to a carapace length of 15 cm (5.9 in). Its carapace typically ranges in color from a yellowish-tan to a deep chocolate-brown, and all turtles have a distinct pattern of lines. The turtle's head is often colorful with yellow or green eyes, yellow stripes, and a pink or red throat. Two (sometimes four) eye-like ocelli occur on the back of the head, hence the turtle's name.[5][verification needed][6]


Four-eyed turtles occur in freshwater streams, brooks, and ponds in woodland, often mountainous habitats. As a result of their rugged surroundings, they have adapted to become adept climbers.

While their dietary preferences have not been studied in detail, it is known that they do eat a wide variety of animals and plants including crickets, worms, snails, trout chow, aquatic plants, greens and lettuces, and certain fruits.[3]

Status and conservation[edit]

This species is included on CITES Appendix III and listed as Endangered by the IUCN.[3]

A main factor in the decline of the four-eyed turtle is trade and demand for their shells.[citation needed] Therefore, species recovery programs are needed to ensure the future of the species. There is currently an extensive communication between zoo and conservation personnel in Vietnam whose goal is to coordinate recovery programs. The recovery programs will include legal protection for the turtles which will affect turtle trading.[citation needed]

Large quantities of turtle shell are used as an ingredient in Traditional Chinese Medicine (TCM). For instance, Taiwan confirmed that 940 tons of hard shelled turtle bone and 200 tons of soft shell turtle bones were imported between 1992 and 1998. The plastron - the belly shell - is used in TCM prescriptions. Some TCM scientists argue that there is no difference between plastron and carapace (back shell) bone. So, if both plastron and carapace bone are utilized, the demand of TCM for freshwater turtles, including four-eyed turtles, could decrease by 50%[verification needed].[7][8] Current TCM research also suggests that there is no pharmaceutical difference in the effects of bone from animals produced on farms and animals captured in nature. As a result, farm production of turtle bone for TCM is likely to increase. In addition, TCM research could help find alternatives to turtle bone such as herbs.

Conservation efforts[edit]

The Asian Turtle Conservation Network has helped publicize turtle conservation all throughout Asia.[9] The ATCN has a regularly updated website with up-to-date news that helps spotlight the status of endangered turtles throughout Asia.


  1. ^ Fritz, Uwe; Havaš, Peter (2007). "Checklist of Chelonians of the World". Vertebrate Zoology 57 (2): 247–248. ISSN 1864-5755. Archived from the original (PDF) on 2010-12-17. Retrieved 29 May 2012. 
  2. ^ Sometimes confused with a related and similar species, Beale's four-eyed turtle (Sacalia bealei ).
  3. ^ a b c "Sacalia quadriocellata". Asian Turtle Conservation Network. Retrieved 2007-05-08. 
  4. ^ Parham et al. (2001), Buskirk et al. (2005).
  5. ^ "Sacalia bealei : Four-eyed Turtle". The Asian Turtle Consortium. Retrieved 2007-05-15. 
  6. ^ "Chinese Four-Eyed Turtles, genus Sacalia". Hopson, Mary. Retrieved 2007-05-09. 
  7. ^ "Conclusions from the Workshop on Trade in Tortoises and Freshwater Turtles in Asia". Asian Turtle Trade Working Group. Retrieved 2007-05-19. 
  8. ^ Or even more, since the carapace is larger than the plastron.
  9. ^ "Asian Turtle Conservation Network". Retrieved 2007-05-19. 


  • Asian Turtle Trade Working Group (2000). Sacalia quadriocellata. 2006. IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 17 June 2007. Listed as Endangered (EN A1d+2d).
  • Buskirk, James R.; Parham, James F. & Feldman, Chris R. (2005). On the hybridisation between two distantly related Asian turtles (Testudines: Sacalia × Mauremys). Salamandra 41: 21-26. PDF fulltext
  • Parham, James Ford; Simison, W. Brian; Kozak, Kenneth H.; Feldman, Chris R. & Shi, Haitao (2001). New Chinese turtles: endangered or invalid? A reassessment of two species using mitochondrial DNA, allozyme electrophoresis and known-locality specimens. Animal Conservation 4 (4): 357–367. HTML abstract Erratum: Animal Conservation 5 (1): 86 HTML abstract
  • Siebenrock, Friedrich. (1903). "Schildkröten des östlichen Hinterindien". Sitzungsberichte der Mathematisch-Naturwissenschaftlichen Klasse der Kaiserlichen Akademie der Wissenschaften [Vienna] 112: 333-353. ("Clemmys bealii Gray nov. var. quadriocellata", pp. 336–338).

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