Geoemydidae

Not to be confused with Geomyidae.

Geoemydidae
Ornate Wood Turtle Rhinoclemmys pulcherrima manni
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Superfamily:	Testudinoidea
Family:	Geoemydidae Theobald, 1868
Synonyms
Geoemydidae Theobald 1868:9[1] Batagurina Gray 1869:185[2] Bataguridae Gray 1870:17[3]

The Geoemydidae (formerly known as Bataguridae) are one of the largest and most diverse families^[4] in the order Testudines (turtles), with about 70 species. The family includes the Eurasian pond and river turtles and Neotropical wood turtles.

Characteristics

Geoemydidae are turtles of various sizes (from about 10 to 80 cm in length) with often a high degree of sexual dimorphism. They usually have webbed toes, and their pelvic girdles articulate with their plastrons flexibly. Their necks are drawn back vertically. Their carapaces have 24 marginal scutes. The plastron is composed of 12 scutes and has no mesoplastron; the pectoral and abdominal scutes contact the marginal scutes.

Some other features include a single articulation between the fifth and sixth cervical vertebrae, the lack of a hyomandibular branch of the facial nerve, and an epipterygoid bone in the skull.

Ecology

Geoemydidae live in tropics and subtropics of Asia, Europe and North Africa, the only genus in Central and South America is Rhinoclemmys. Their habitats include freshwater ecosystems, coastal marine areas, and tropical forests. Most are herbivorous, but some are omnivorous or carnivorous species. In mating, the males are usually much more active than females. A relatively small number of eggs per clutch is common, produced several times a year. Some species have a temperature-dependent sex determination system, while others possess different sex chromosomes.

About 70% of the extant species have been reported to be in endangered or vulnerable condition.

Systematics and evolution

Traditional systematics placed the geoemydids in the family Emydidae as the subfamily Batagurinae. In the 1980s, the subfamily was elevated to the family status and renamed to Geoemydidae according to the ICZN rules.

Most fossil and molecular data support their close relationship to the family Testudinidae.

The intrafamilial taxonomy is not well established yet, due to the large number and diversity of species. The family is usually divided into two subfamilies and 19 genera.^[4] Several species are known to give viable hybrids, which makes the systematics even more complicated.^[5]

Subfamilies and genera

The following genera are classified under Geoemydidae.^[4]

• Subfamily Geoemydinae
  • Genus Batagur (six species, including part of Kachuga)
  • Genus Cuora, Asian box turtle (10 species) (including Cistoclemmys)
  • Genus Cyclemys (seven species)
  • Genus Geoclemys (monotypic genus)
  • Genus Geoemyda (two species)
  • Genus Hardella (monotypic genus)
  • Genus Heosemys (formerly in Geoemyda)
  • Genus Leucocephalon (formerly in Geoemyda and Heosemys)
  • Genus Malayemys (two species)
  • Genus Mauremys, pond turtles (including Annamemys, Cathaiemys and Emmenia)
  • Genus Melanochelys (two species)
  • Genus Morenia (two species)
  • Genus Notochelys (monotypic genus)
  • Genus Orlitia (monotypic genus)
  • Genus Pangshura (four species) (formerly in Kachuga)
  • Genus Sacalia, "eyed" turtles
  • Genus Siebenrockiella (two species, one subgenus Panyaenemys, formerly under Heosemys)
  • Genus Vijayachelys, cane turtle (formerly in Geoemyda and Heosemys)

• Subfamily Rhinoclemmydinae
  • Genus Rhinoclemmys, Neotropical wood turtles

Conservation

As of the early 2013, six species of the family Geoemydidae are on the CITES Appendix I, and 30 more are on the treaty's Appendix II. A joint China-US proposal for a March 2013 CITES participants' conference seeks to add 15 more Geoemydidae species to the convention's Appendix II.^{[6] [7]}

References

External links

Wikispecies has information related to: Geoemydidae

Wikimedia Commons has media related to Geoemydidae.

• An article about the phylogeny of Geoemydidae
• Geoemydidae (all species) at The Reptile Database

Turtle family Geoemydidae Genus Species of the family Geoemydidae Batagur Burmese roofed turtle Northern river terrapin Painted terrapin Red-crowned roofed turtle Southern river terrapin Three-striped roofed turtle Cuora Amboina box turtle Bourret's box turtle Indochinese box turtle McCord's box turtle Keeled box turtle Pan's box turtle Southern Vietnamese box turtle Chinese three-striped box turtle Yellow-headed box turtle Yellow-margined box turtle Yunnan box turtle Zhou's box turtle Cyclemys Asian leaf turtle Assam leaf turtle Eastern black-bridged leaf turtle Enigmatic leaf turtle Myanmar brown leaf turtle Oldham's leaf turtle Western black-bridged leaf turtle Geoclemys Black pond turtle Geoemyda Black-breasted leaf turtle Ryukyu black-breasted leaf turtle Hardella Brahminy river turtle Heosemys Arakan forest turtle Giant Asian pond turtle Spiny turtle Yellow-headed temple turtle Leucocephalon Sulawesi forest turtle Malayemys Malayan snail-eating turtle Mekong snail-eating turtle Mauremys Balkan pond turtle Caspian turtle Chinese pond turtle Chinese stripe-necked turtle Japanese pond turtle Red-necked pond turtle Spanish pond turtle Vietnamese pond turtle Yellow pond turtle Melanochelys Indian black turtle Tricarinate hill turtle Morenia Burmese eyed turtle Indian eyed turtle Notochelys Malayan flat-shelled turtle Orlitia Malaysian giant turtle Pangshura Assam roofed turtle Brown roofed turtle Indian roofed turtle Indian tent turtle Rhinoclemmys Black river turtle Brown wood turtle Colombian wood turtle Furrowed wood turtle Large-nosed wood turtle Maracaibo wood turtle Mexican spotted wood turtle Painted wood turtle Spot-legged turtle Sacalia Beal's eyed turtle Four-eyed turtle Siebenrockiella Black marsh turtle Philippine forest turtle Vijayachelys Cane turtle Phylogenetic arrangement based on turtles of the world 2011 update: annotated checklist.