Pythonodipsas | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Serpentes |
Family: | Pseudaspididae |
Genus: | Pythonodipsas Günther, 1868 |
Species: | P. carinata |
Binomial name | |
Pythonodipsas carinata Günther, 1868 | |
The western keeled snake (Pythonodipsas carinata) is a species of snake in the family Pseudaspididae. It is native to western Namibia, southwestern Angola, and southwestern Zambia, and is the only member of the genus Pythonodipsas. [1]
P. carinata is most closely related to Pseudaspis cana . Together these two monotypic genera make up the subfamily Pseudaspidinae of the family Lamprophiidae.
Pythonodipsas closely resembles the colubrine genus Spalerosophis , although the two are not closely related. [2]
P. carinata is unusual in possessing greatly fragmented head shields, a peculiar maxillary dentition (3rd to 6th largest, posterior-most tooth large and grooved), a reduced number of palatine teeth (including a greatly enlarged "fang"), and hypapophyses developed throughout the vertebral column. It was once thought to be a possible evolutionary intermediate between vipers and non-venomous colubroids, [3] [4] but it is now known not to be closely related to vipers.
P. carinata are nocturnal.
P. carinata eat vertebrates, with lizards comprising 67% of the diet, rodents 25%, birds 4%, and unidentified vertebrate bones 4%. Among lizard prey, geckos (39% of all prey) and skinks (18%) predominated. Both nocturnal (Afroedura, Chondrodactylus, Palmatogecko and Pachydactylus) and diurnal geckos (Rhoptropus and Narudasia) were eaten. All skink prey were Mabuya sp. Mammalian prey were eaten primarily by larger snakes. [5]
P. carinata is a rare snake restricted to gravel plains and arid savannah.
P. carinata lay eggs. Females probably mature between 47.5 and 51.0 cm snout-vent length, and males between 29.0 and 31.0 cm snout-vent length. Juveniles are born at sizes between 16 and 18 cm. [5]
Belize is a country with a rich variety of wildlife, due to its unique position between North and South America, and a wide range of climates and habitats for plant and animal life. Belize's low human population, and approximately 8,867 square miles (22,970 km2) of undistributed land, provides an ideal home for more than 5000 species of plants, and vast numbers species of animals — with several hundred vertebrates including armadillos, snakes, and monkeys.
Lycodon striatus, commonly known as the northern wolf snake or the barred wolf snake, is a species of nonvenomous colubrid snake from southern Asia.
Lamprophis is a genus of medium-sized, nonvenomous snakes commonly referred to as African house snakes, in the family Lamprophiidae.
Opheodrys aestivus, commonly known as the rough green snake, is a nonvenomous North American colubrid. It is sometimes called grass snake or green grass snake, but these names are more commonly applied to the smooth green snake. The European colubrid called grass snake is not closely related. The rough green snake is docile, often allowing close approach by humans, and seldom bites. Even when bites occur, they have no venom and are harmless.
Elaphe carinata, the king ratsnake, is a species of Colubrid snake found in Southeast and East Asia.
Macroprotodon cucullatus, commonly known as the false smooth snake, is a species of mildly venomous colubrid snake endemic to the Mediterranean Basin.
Echiopsis curta is a terrestrial, elapid species of snake, also commonly known from the Aboriginal name as the bardick. It is a short, highly venomous snake with variable color which is mainly nocturnal, reaching a maximum length of 57 cm. It is endemic to Australia, most commonly found in three distinct populations through southern Australia. They are considered venomous to humans, however there is very little information. Their population is decreasing due to habitat degradation and destruction but considered least concern on the IUCN Red List.
Lampropeltis rhombomaculata, commonly known as the mole kingsnake or the brown kingsnake, is a species of snake in the family Colubridae. It is a relatively medium-sized snake that occupies a variety of habitats from Baltimore, Maryland, south through the Florida Panhandle and west into Mississippi and Tennessee.
Telescopus semiannulatus, commonly known as the common tiger snake, tiger cat snake, western tiger snake, or eastern tiger snake is a species of rear-fanged colubrid snake. It is widespread in central, eastern, and southern Africa.
The stripe-tailed goanna, also known as the line-tailed pygmy monitor is a semi-arboreal species of monitor lizard native to Western Australia.
Dipsadoboa aulica, commonly known as the marbled tree snake, is a species of snake in the family Colubridae. The species is endemic to Africa, and is mildly venomous to humans.