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Pseudocordylus Capensis
The false girdled lizard (''Hemicordylus capensis'') is a lizard species endemic to the Cape Fold Belt of southern South Africa. Description The maximum snout-to-vent length is about 76 mm. Like its sister species ''Hemicordylus nebulosus'', it has gracile features, with a phenotype described as intermediate between typical ''Cordylus'' and the larger, more robust ''Pseudocordylus ''Pseudocordylus'' is a genus of small to large girdled lizards from South Africa, commonly known as crag lizards. Six species of ''Pseudocordylus'' are known; they are distinguished from girdled lizards of the genus ''Cordylus'' by the presen ...''. They have long limbs, and long slender digits. Some populations are melanistic and sexually dichromatic. Habits Their specialized adaptation to steep rock faces is believed to have favoured their agility and lightly armored anatomy.Eifler et al., 2007; Janse van Rensburg, 2009; Janse van Rensburg et al., 2009 They give live birth to one to thre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andrew Smith (zoologist)
Sir Andrew Smith (3 December 1797 – 11 August 1872) was a British surgeon, explorer, ethnologist and zoologist. He is considered the father of zoology in South Africa having described many species across a wide range of groups in his major work, ''Illustrations of the Zoology of South Africa''. Smith was born in Hawick, Roxburghshire. He qualified in medicine at the University of Edinburgh obtaining an M.D. degree in 1819, having joined the Army Medical Services in 1816. South Africa 1820–1837 In 1820 he was ordered to the Cape Colony and was sent to Grahamstown to supervise the medical care of European soldiers and soldiers of the Cape Corps. He was appointed the Albany district surgeon in 1822 and started the first free dispensary for indigent patients in South Africa. He led a scientific expedition into the interior and was able to indulge in his interests of natural history and anthropology. On several occasions, he was sent by governors on confidential missions to vis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Fold Belt
The Cape Fold Belt is a fold and thrust belt of late Paleozoic age, which affected the sequence of sedimentary rock layers of the Cape Supergroup in the southwestern corner of South Africa. It was originally continuous with the Ventana Mountains near Bahía Blanca in Argentina, the Pensacola Mountains (East Antarctica), the Ellsworth Mountains (West Antarctica) and the Hunter-Bowen orogeny in eastern Australia. The rocks involved are generally sandstones and shales, with the shales (Bokkeveld Group) persisting in the valley floors while the erosion resistant sandstones (belonging to the Peninsula Formation) form the parallel ranges, the Cape Fold Mountains, which reach a maximum height of 2325 m at Seweweekspoortpiek ('Seven Weeks Defile Peak' in Afrikaans). The Cape Fold Mountains form a series of parallel ranges that run along the south-western and southern coastlines of South Africa for 850 km from the Cederberg 200 km to the north of the Cape Peninsula, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini. It also completely enclaves the country Lesotho. It is the southernmost country on the mainland of the Old World, and the second-most populous country located entirely south of the equator, after Tanzania. South Africa is a biodiversity hotspot, with unique biomes, plant and animal life. With over 60 million people, the country is the world's 24th-most populous nation and covers an area of . South Africa has three capital cities, with the executive, judicial and legislative branches of government based in Pretoria, Bloemfontein, and Cape Town respectively. The largest city is Johannesburg. About 80% of the population are Black South Afri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemicordylus Nebulosus
''Hemicordylus nebulosus'' is a species of lizard in the Cordylidae family. It is endemic to South Africa on the mist belt of northern slope of the Hottentots Holland Mountains The Hottentots Holland Mountains are part of the Cape Fold Belt in the Western Cape, South Africa. The mountain range forms a barrier between the Cape Town metropolitan area and the southern Overberg coast. The range is primarily composed of Ta .... The scientific name, H. nebulosus means cloud or dark crag lizard. The name was given due to the melanistic body color. Other names include the dwarf cliff lizard, dwarf crag lizard, dark crag lizard and the cloudy crag lizard. References Sources * ''Hemicordylus'' resurrectedStanley et al., 2011 Between a rock and a hard polytomy: Rapid radiation in the rupicolous girdled lizards (Squamata: Cordylidae) * Hemicordylus Endemic reptiles of South Africa Reptiles described in 1995 Taxa named by Pieter Le Fras Nortier Mouton Taxa named by Johannes H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phenotype
In genetics, the phenotype () is the set of observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physiological properties, its behavior, and the products of behavior. An organism's phenotype results from two basic factors: the expression of an organism's genetic code, or its genotype, and the influence of environmental factors. Both factors may interact, further affecting phenotype. When two or more clearly different phenotypes exist in the same population of a species, the species is called polymorphic. A well-documented example of polymorphism is Labrador Retriever coloring; while the coat color depends on many genes, it is clearly seen in the environment as yellow, black, and brown. Richard Dawkins in 1978 and then again in his 1982 book ''The Extended Phenotype'' suggested that one can regard bird nests and other built structures such as cad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cordylus
The genus ''Cordylus'' (Sauria: Cordylidae) includes a wide variety of species of small to medium spiny lizards from Africa, collectively called girdle-tailed lizards 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'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudocordylus
''Pseudocordylus'' is a genus of small to large girdled lizards from South Africa, commonly known as crag lizards. Six species of ''Pseudocordylus'' are known; they are distinguished from girdled lizards of the genus ''Cordylus'' by the presence of granular scales on the back instead of osteoderms. Species The following six species are recognized as being valid."''Pseudocordylus''". The Reptile Database. www.reptile-database.org. *'' Pseudocordylus langi'' – Lang's crag lizard *'' Pseudocordylus melanotus'' – Common crag lizard *'' Pseudocordylus microlepidotus'' – Cape crag lizard *'' Pseudocordylus spinosus'' – Spiny crag lizard *'' Pseudocordylus subviridis'' – Drakensberg crag lizard *'' Pseudocordylus transvaalensis'' – Northern crag lizard ''Nota bene'': A binomial authority In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of namin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viviparous
Among animals, viviparity is development of the embryo inside the body of the parent. This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the mother. The term 'viviparity' and its adjective form 'viviparous' derive from the Latin ''vivus'' meaning "living" and ''pario'' meaning "give birth to". Reproductive mode Five modes of reproduction have been differentiated in animals based on relations between zygote and parents. The five include two nonviviparous modes: ovuliparity, with external fertilisation, and oviparity, with internal fertilisation. In the latter, the female lays zygotes as eggs with a large yolk; this occurs in all birds, most reptiles, and some fishes. These modes are distinguished from viviparity, which covers all the modes that result in live birth: *Histotrophic viviparity: the zygotes develop in the female's oviducts, but find their nutrients by oophagy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemicordylus
''Hemicordylus'', the false girdled lizards, is a genus comprising two lizard species endemic to the Cape Fold Belt of southern South Africa. Description Their maximum snout-to-vent length is about 76 mm. They have gracile features, with a phenotype which is described as intermediate between typical ''Cordylus'' and the larger, more robust '' Pseudocordylus''. They have long limbs, and long slender digits. Some populations are melanistic and sexually dichromatic.''Hemicordylus'' resurrected: The melanistic populations have been shown to be ecotypes rather than relics in the related genus ''Karusasaurus''. Habits Their specialized adaptation to steep rock faces, is believed to have favoured their agility and lightly armored anatomy.Eifler et al., 2007; Janse van Rensburg, 2009; Janse van Rensburg et al., 2009 They give live birth to 1–3 young. Species * ''Hemicordylus capensis'' – false girdled lizard * ''Hemicordylus nebulosus ''Hemicordylus nebulosus'' is a spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reptiles Of South Africa
Reptiles, as most commonly defined are the animals in the class Reptilia ( ), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates (lizards and snakes) and rhynchocephalians (tuatara). As of March 2022, the Reptile Database includes about 11,700 species. In the traditional Linnaean classification system, birds are considered a separate class to reptiles. However, crocodilians are more closely related to birds than they are to other living reptiles, and so modern cladistic classification systems include birds within Reptilia, redefining the term as a clade. Other cladistic definitions abandon the term reptile altogether in favor of the clade Sauropsida, which refers to all amniotes more closely related to modern reptiles than to mammals. The study of the traditional reptile orders, historically combined with that of modern amphibians, is called herpetology. The earliest known proto-reptiles originated around 31 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reptiles Described In 1838
Reptiles, as most commonly defined are the animals in the class Reptilia ( ), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates (lizards and snakes) and rhynchocephalians (tuatara). As of March 2022, the Reptile Database includes about 11,700 species. In the traditional Linnaean classification system, birds are considered a separate class to reptiles. However, crocodilians are more closely related to birds than they are to other living reptiles, and so modern cladistic classification systems include birds within Reptilia, redefining the term as a clade. Other cladistic definitions abandon the term reptile altogether in favor of the clade Sauropsida, which refers to all amniotes more closely related to modern reptiles than to mammals. The study of the traditional reptile orders, historically combined with that of modern amphibians, is called herpetology. The earliest known proto-reptiles originated around 31 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
