Hong Kong Newt

Taxobox
name = Hong Kong Newt
status = NT | status_system = IUCN3.1
trend = down

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image_width = 250px
regnum = Animalia
phylum = Chordata
classis = Lissamphibia
ordo = Caudata
familia = Salamandridae
genus = "Paramesotriton"
species = "P. hongkongensis "
binomial = "Paramesotriton hongkongensis"
binomial_authority = (Myers and Leviton, 1962)

Hong Kong Newt ("Paramesotriton hongkongensis", see also [http://research.amnh.org/herpetology/amphibia/references.php?id=23497 the synonyms] ) is the only species of salamander, also known as "tailed amphibians", found in Hong Kong. Once thought to be endemic to the territory, the species has also been found in the coastal parts of Guangdong Province.

The newt is treated by some naturalists as a sub-species of "Paramesotriton chinensis". However, some disagree such a classification based on the disjunctive distribution of the two, and the differences in their physical appearance and habitat preference.

Physical descriptions

The snout-to-tail length of the newt is about 11 to 15 cm. The body colour ranges from light brown to dark brown, with patches of orange markings scattered on the ventral side. The patterns of the patches are unique for each individual, resembling the fingerprints of humans. Small granules can be found throughout the body. A mid-dorsal skin ridge extends backwards from the neck through the anterior third of the tail. Two dorsolateral folds are also present.

The head is roughly triangular. The eyes have horizontal pupils. The tail is thin and flattened, with a thin red strip along the ventral border. The four legs are similar in size. Four and five unwebbed digits can be found at the anterior and posterior limbs respectively.

The tadpoles of the newt have finger-like gills around their necks, seldom found in the tadpoles of frogs and toads. The gills disappear completely after the metamorphosis.

When threatened it releases a toxic secretion and may also feign death, rolling onto it's back and exposing it's brightly coloured belly.

In the breeding season the male displays by beating it's tail which develops a white or bluish stripe which is visible in dim light. Sperm is transferred to the female in a spermatophore. Eggs are laid singly and are wrapped in leaves.

Conservation

In Hong Kong, it is a protected species under Wild Animals Protection Ordinance Cap 170..

References

* Database entry includes a range map and justification for why this species is near threatened
*Stephen J. Karsen, Michael Wai-neng Lau and Anthony Bogadek, "Hong Kong amphibians and reptiles", 2nd ed., Hong Kong: Provisional Urban Council, 1998, ISBN 962-7849-05-7.

External links

* [http://www.hkras.org Hong Kong Reptile & Amphibian Society]
* [http://www.livingunderworld.org/gallery/photos/caudata/salamandridae/paramesotriton/hongkongensis/ Gallery of the newt]