| Xenophidion | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Xenophidiidae Wallach & Günther, 1998 |
| Genus: | Xenophidion Günther & Manthey, 1995 |
Xenophidion is a genus of snakes first described in 1995, and the only genus of the monotypic family Xenophidiidae. [1] Commonly referred to as spinejaw snakes, this genus is found in Borneo and peninsular Malaysia.
This genus is taxonomically and phylogenetically challenging to classify, as these snakes possess several morphological traits that distinguish them from all other snake species; head scales with numerous sensory papillae, large prefrontal scales, and an upper jaw which has a spiny palatine process. They also lack any pelvic girdle vestiges, a left lung, or a coronoid bone. [2] In 2004, cytochrome b sequencing suggested a sister relationship of Xenophidion to Bolyeriidae from Mauritius. [3] Similar to Boyleriidae, spinejaw snakes have a jointed maxilla.
Very little is known about this genus. Specimen dissection has revealed the presence of a partially digested skink and an oviparous mode of reproduction, but male specimens have not yet been identified. [4] They are likely fossorial and may be under severe threat from palm oil agriculture.
The reticulated python is a python species native to South and Southeast Asia. It is the world's longest snake, and the third heaviest after the green anaconda and Burmese python. It is listed as least concern on the IUCN Red List because of its wide distribution. In several countries in its range, it is hunted for its skin, for use in traditional medicine, and for sale as pets. Due to this, reticulated pythons are one of the most economically important reptiles worldwide.
The king cobra is a venomous snake endemic to Asia. The sole member of the genus Ophiophagus, it is not taxonomically a true cobra, despite its common name and some resemblance. With an average length of 3.18 to 4 m and a record length of 5.85 m (19.2 ft), it is the world's longest venomous snake. The species has diversified colouration across habitats, from black with white stripes to unbroken brownish grey. The king cobra is widely distributed albeit not commonly seen, with a range spanning from the Indian Subcontinent through Southeastern Asia to Southern China. It preys chiefly on other snakes, including those of its own kind. This is the only ophidian that constructs an above-ground nest for its eggs, which are purposefully and meticulously gathered and protected by the female throughout the incubation period.
Heloderma is a genus of toxicoferan lizards that contains five species, all of which are venomous. It is the only extant genus of the family Helodermatidae.
Anomochilus is a genus of snakes, it is the only genus in the monogeneric family Anomochilidae and has three species classified within it. Members of the genus are known as anomochilids, or by the common names dwarf pipesnake, lesser pipesnake, and giant blind snake. Initially created as Anomalochilus in 1890 for the species A. weberi, the genus was renamed in 1901 because the original name was already in use for a genus of beetles. Dwarf pipesnakes are small and cylindrical, with short, conical tails and small, rounded heads that are continuous with the neck. They have blackish to purplish-brown uppersides and dark brown or black undersides, with orange-red bands around the tail and a variety of pale markings on the snout and belly. All three species of dwarf pipesnake are endemic to Sundaland, where they are found on the Malay Peninsula and the islands of Sumatra and Borneo.
Coral snakes are a large group of elapid snakes that can be divided into two distinct groups, the Old World coral snakes and New World coral snakes. There are 27 species of Old World coral snakes, in three genera, and 83 recognized species of New World coral snakes, in two genera. Genetic studies have found that the most basal lineages have origins in Asia, suggesting that the group originated in the Old World. While new world species of both genera are venomous, their bites are seldom lethal; only two confirmed fatalities have been documented in the past 100 years from the genus Micrurus. Meanwhile, snakes of the genus Micruroides have never caused a medically significant bite.
The Bolyeriidae are a family of snakes native to Mauritius and a few islands around it, especially Round Island. They also used to be found on the island of Mauritius, but were extirpated there due to human influence and foraging pigs in particular. These snakes used to be placed in the Boidae, but are now classed as a separate family. Two monotypic genera are recognized, but only a single species is extant. Bolyeriidae appear to be most closely related to the Asian genus Xenophidion.
Bitis is a genus of venomous vipers found in Africa and the southern Arabian Peninsula. It includes the largest and the smallest vipers in the world. Members are known for their characteristic threat displays that involve inflating and deflating their bodies while hissing and puffing loudly. The type species for this genus is B. arietans, which is also the most widely distributed viper in Africa. Currently, 18 species are recognized.
The Cylindrophiidae are a monotypic family of secretive, semifossorial, non-venomous snakes containing the genus Cylindrophis found in southeastern Asia. These are burrowing snakes and most have a banded pattern on the belly. Currently, 13 species are recognized, all with no subspecies. Common names include Asian pipe snakes or Asian cylinder snakes.
Ovophis monticola, commonly known as the Chinese mountain pit viper, is a venomous pitviper species found in Asia. Currently, two subspecies are recognized, including the nominate subspecies described here. Recent taxonomic work suggests that most of these should be considered as separate species. IUCN has already evaluated O. m. makazayazaya as Ovophis makazayazaya.
Echis is a genus of vipers found in the dry regions of Africa, the Middle East, India, Sri Lanka and Pakistan. They have a characteristic threat display, rubbing sections of their body together to produce a "sizzling" warning sound. The name Echis is the Latin transliteration of the Greek word for "viper" (ἔχις). Like all vipers, they are venomous. Their common name is "saw-scaled vipers" and they include some of the species responsible for causing the most snakebite cases and deaths in the world. Twelve species are currently recognized.
Python is a genus of constricting snakes in the Pythonidae family native to the tropics and subtropics of the Eastern Hemisphere.
Glyphoglossus is a genus of frogs in the family Microhylidae. The genus occurs in Southeastern Asia. Common name balloon frogs has been coined for it, whereas the common name squat frogs refers to the Calluella species that are now included in this genus. They are fossorial frogs that spend only limited time on the soil surface and are typically known from only few specimens.
Anomochilus leonardi, also known by the common names Leonard's pipe snake, Leonard's burrowing snake, and Malayan giant blind snake, is a species of snake in the dwarf pipesnake family Anomochilidae. It is endemic to the Malay Peninsula and Borneo, where it inhabits primary and mature secondary dipterocarp forests at altitudes of 250–500 m (820–1,640 ft). Described by the herpetologist Malcolm Arthur Smith in 1940, the species is a stout, cylindrical snake with a small head and short, conical tail. It has a snout–vent length of up to 390 mm (15 in), and has a black underside with a glossy black to purplish brown upperside. It also has two rows of elliptical yellow spots along the back, a yellow bar across the snout, and a large red patch on the subcaudal scales. It can be told apart from the other species in its genus by the absence of pale stripes along its sides, an unpaired parietofrontal scale, and the presence of the pale patches along its back.
The Alethinophidia are an infraorder of snakes that includes all snakes other than blind snakes and thread snakes. Snakes have long been grouped into families within Alethinophidia based on their morphology, especially that of their teeth. More modern phylogenetic hypotheses using genetic data support the recognition of 19 extant families, although the taxonomy of alethinophidian snakes has long been debated, and ultimately the decision whether to assign a particular clade to a particular Linnaean rank is arbitrary.
Garthius chaseni, commonly known as Chasen's mountain pit viper, Chasen's tree viper, and the Kinabalu brown pit viper, is a species of venomous pitviper in the family Viperidae. The species is endemic to the island of Borneo in Malaysia. No subspecies are currently recognized. It is monotypic in the genus Garthius.
Anomochilus monticola, the Kinabalu giant blind snake, mountain pipe snake, or Mount Kinabalu dwarf pipesnake, is a species of snake in the dwarf pipesnake family Anomochilidae. It is endemic to Kinabalu Park in northern Borneo, where it inhabits montane and submontane rainforest at altitudes of 1,450–1,513 m (4,757–4,964 ft). Described by the herpetologist Indraneil Das and colleagues in 2008, the species is a stout, cylindrical snake with a small head and short, conical tail. It is the largest species in its genus, with a total length of 521 mm (20.5 in). It is mostly iridescent blue-black in color, with a deep brown belly, large pale horn-colored blotches along the underside, a chrome orange band around the tail, a pale creamy-yellow bar across the snout, and pale horn-colored speckles along its sides. It can be told apart from the other species in its genus by its large size, the absence of a stripe along its sides, and the lack of pale blotches on its back.
Simalia tracyae, the Halmahera python, is a species of python found only on the Indonesian island of Halmahera. It belongs to the family Pythonidae and the genus Simalia. This snake was previously believed to have belonged to the Simalia amesthistina species; however, studies in recent years have caused scientists to distinguish between the two types of snakes, resulting in the reclassification of the Halmahera python as its own species.
Malayopython is a genus of constricting snakes in the family Pythonidae. The genus is native to India and Southeast Asia. It contains two species, both of which were previously classified within the genus Python. However, multiple studies recovered these species as distinct. Known as the "reticulatus clade", it was eventually found to be a sister lineage to a lineage giving rise to the Indo-Australian pythons rather than the genus Python.
Xenophidion schaeferi, also known commonly as the Malayan spinejaw snake or Schäfer's spiny-jawed snake, is a species of snake in the monotypic family Xenophidiidae. The species is endemic to Malaysia.
The Elapoidea are a superfamily of snakes in the clade Colubroides, traditionally comprising the families Lamprophiidae and Elapidae. Advanced genomic sequence studies, however, have found lamprophiids to be paraphyletic in respect to elapids, and anywhere between four and nine families are now recognized.