Cordylus

Cordylus
Tropical girdled lizard (Cordylus tropidosternum)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Sauria
Infraorder: Scincomorpha
Family: Cordylidae
Genus: Cordylus
Laurenti, 1768

The genus Cordylus (Sauria: Cordylidae) includes a wide variety of small- to medium-sized spiny lizards from Africa, collectively called girdle-tailed or girdled lizards. All are diurnal and ovoviviparous (live-bearing, without shelled eggs). Most species are rupicolous (rock-dwelling), while a few species are arboreal or live in burrows. They defend themselves with osteoderms (flat bony plates in the skin) and by quickly retreating into rock crevices or burrows. Many species live in groups and males defend territories.

Cordylids are generally listed under CITES Appendix II. They are not necessarily threatened with extinction, but trade is controlled to prevent overexploitation. Some species of Cordylus have limited ranges and may be threatened with habitat destruction or over collecting for the pet trade.

Classification

Broadley (2006) recognized 47 species in the genus Cordylus, including eight species originally placed in the genus Pseudocordylus ( P. fasciatus, P. langi, P. melanotus, P. microlepidotus, P. nebulosus, P. spinosus, P. subvirdis, and P. transvaalensis) and Hemicordylus capensis. The greatest diversity of cordylids is in South Africa, with a few species found in Angola and eastern Africa as far north as Ethiopia. Other members of the Cordylidae are the genera Chamaesaura (a group of legless lizards from southern and eastern Africa) and Platysaurus. The sister group of Cordylidae is the plated lizards, family Gerrhosauridae.

In 2011, a study based on the molecular phylogeny of the family suggested several species traditionally included in Cordylus should be moved to other genera: Hemicordylus (for capensis and nebulosus), Karusasaurus (for jordani and polyzonus), Namazonurus (for campbelli, lawrenci, namaquensis, peersi and pustulatus), Ninurta (for coeruleopunctatus), Ouroborus (for cataphractus) and Smaug (for breyeri, giganteus, mossambicus, regius, vandami and warreni).[1] This classification is supported by the Reptile Database where only 21 species remain in Cordylus.[2]

Genus Cordylus (as traditionally defined, sensu lato)

Pair of Cordylus cataphractus
Cordylus giganteus
Cordylus niger, unique to two small areas of South Africa
Cordylus warreni

References

  1. ↑ Stanley, Edward L.; Bauer, Aaron M.; Jackman, Todd R.; Branch, William R.; Mouton, P. Le Fras N. (2011). "Between a rock and a hard polytomy: Rapid radiation in the rupicolous girdled lizards (Squamata: Cordylidae)" (PDF). Molecular Phylogenetics and Evolution 58 (1): 53–70. doi:10.1016/j.ympev.2010.08.024.
  2. ↑ Uetz, Peter et al. (2014). The Reptile Database. Retrieved 11 November 2014.
  3. ↑ (PDF) http://web.archive.org/web/20110607065817/http://www.cites.org/common/com/NC/tax_ref/Cordylus_CoP14_update.pdf. Archived from the original (PDF) on June 7, 2011. Retrieved October 19, 2007. Missing or empty |title= (help)

Further reading

External links

This article is issued from Wikipedia - version of the Saturday, March 19, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.