Xenodermus javanicus, also known as the dragon snake, Javan tubercle snake, Javan mudsnake, or rough-backed litter snake,[1][2][3] is a small non-venomous, semi-fossorial snake species belonging to the monotypic genus Xenodermus.[4] This species is best known for their characteristic dorsal scales and interesting defense mechanism in which they stiffen their entire bodies when threatened. X. javanicus is nocturnal and subsists on a diet of frogs, tadpoles and small fish.[5] While they are known to perish once placed into captivity, some herpetoculturists have been successful in keeping them.
Xenodermus javanicus is found in the Malay Peninsula (Malaysia, Thailand, and one old record from the southernmost tip of Myanmar) and parts of the Greater Sunda Islands (Sumatra, Java, and Borneo, as well as some smaller islands).[1][2] It inhabits damp areas near water, including forests, swamps, marshes, and rice fields, at elevations below 1,300 m (4,300 ft), but most commonly between 500–1,100 m (1,600–3,600 ft) above sea level.[1]
Xenodermus javanicus has a distinct head and long tail. The body is slender and compressed. The total length is about 50 cm (20 in).[6][7] Males can be distinguished from females by examining the overall size, tail thickness, tail length, and cloacal vent for the presence of a hemipenial bulge. Females will be larger than males and have thinner, shorter tails while lacking a hemipenial bulge. Conversely, males will be smaller in comparison, have thicker, longer tails and exhibit a hemipenial bulge.[5]
Xenodermus javanicus has an unusual chromosomal number of 2n=32, contrasting with the most typical snake karyotype with a stable chromosomal number of 2n=36. The karyotype includes heteromorphic ZZ/ZW sex chromosomes with a heterochromatic W.[9]
Xenodermus javanicus undergo reproduction by egg and have low fecundity (2–4 eggs).[1][2]
Xenodermus javanicus are nocturnal.[5]
Xenodermus javanicus subsist mainly on frogs, tadpoles and small fish.[5]
Xenodermus javanicus exhibit a peculiar property when encountering perceived threats in which they stiffen their entire body to defend themselves. They may also emit a foul-smelling odour called musk.[3][5]
Xenodermus javanicus are rare in the northern parts of their range, but are common in Java. There seem to be no major threats to them, and they can persist in wet agricultural lands such as rice fields. They could be potentially threatened by agricultural pollutants.[1]
Xenodermus javanicus, also known as the dragon snake, Javan tubercle snake, Javan mudsnake, or rough-backed litter snake, is a small non-venomous, semi-fossorial snake species belonging to the monotypic genus Xenodermus. This species is best known for their characteristic dorsal scales and interesting defense mechanism in which they stiffen their entire bodies when threatened. X. javanicus is nocturnal and subsists on a diet of frogs, tadpoles and small fish. While they are known to perish once placed into captivity, some herpetoculturists have been successful in keeping them.
Perekonda Xenodermus klassifitseeritakse roomajate andmebaasis üksainus maoliik[1]:
Nad elavad Myanmaris, Indoneesias, Malaisias ja Tais.
Selles artiklis on kasutatud prantsuskeelset artiklit fr:Xenodermus javanicus seisuga 14.12.2013.
Xenodermus javanicus Xenodermus generoko animalia da. Narrastien barruko Xenodermatidae familian sailkatuta dago.
Xenodermus javanicus Xenodermus generoko animalia da. Narrastien barruko Xenodermatidae familian sailkatuta dago.
Xenodermus javanicus, unique représentant du genre Xenodermus, est une espèce très peu connu de serpents de la famille des Xenodermatidae[1].
Il a une couleur (gris taupe) très discrète, ce qui l'aide à sa survie et qui le rend difficile à observer.
Il atteint, à l'âge adulte, la longueur de 70cm maximum.
Cette espèce se rencontre[1] :
Il est présent à une altitude allant de 500 à 1300 m.
javanicus est une couleuvre,Sumatra%2C Bornéo%2C Java). Fiche
Xenodermus javanicus, unique représentant du genre Xenodermus, est une espèce très peu connu de serpents de la famille des Xenodermatidae.
爪哇閃皮蛇（學名：Xenodermus）是蛇亞目游蛇科閃皮蛇亞科下的一個單型蛇屬，屬下只有爪哇閃皮蛇（Xenodermus javanicus）一種蛇類。[1]
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