Rhyacotriton

Rhyacotriton
	Rhyacotriton variegatus
Systematics
Row :	Land vertebrates (Tetrapoda)
without rank:	Amphibians (Lissamphibia)
Order :	Tail amphibian (caudata)
Superfamily :	Salamander relatives (Salamandroidea)
Family :	Rhyacotritonidae
Genre :	Rhyacotriton
Scientific name of the family
	Rhyacotritonidae
	Tihen , 1958
Scientific name of the genus
	Rhyacotriton
	Dunn , 1920

Torrent salamander is an amphibian species from the order of salamanders and the only genus of the family Rhyacotritonidae .

description

Rhyacotriton species are relatively small salamanders with bodies less than 10 cm in length, relatively short tails, and small heads with showy large eyes. Their coloring is brown on the upper side, sometimes marbled gray, on the ventral side yellow-orange, sometimes dotted with black. The trunk is laterally segmented by 14 to 15 clearly visible rib furrows. Rhyacotriton species have a ring-shaped, otoglossal cartilage. There is no second epibranchial . The lungs are for the most part reduced. The 4 or 5 toes are not webbed . The columella , an ossicle, is wide and spread out like a plate and does not grow together with the walls of the ear capsule . The larvae have no folds in their dorsal fin.

Occurrence

Distribution area: red = R. olympicus , green = R. kezeri , blue = R. cascadae , yellow = R. variegatus

The genus occurs in the northwest of the USA, in the west of Washington , Oregon and in the coastal, northwestern California and inhabits the moist coniferous forests of the Cascade chain with oxygen-rich springs and streams.

Systematics

The genus Rhyacotriton was first described by Emmett Reid Dunn in 1920 . In 1958, JA Tihen placed them in a separate family, Rhyacotritonidae. It includes four types:

Rhyacotriton cascadae Good & Wake, 1992
Rhyacotriton kezeri Good & Wake, 1992
Rhyacotriton olympicus (Gaige, 1917)
Rhyacotriton variegatus Stebbins & Lowe, 1951

swell

Darrel R. Frost: Rhyacotriton . In: Amphibian Species of the World: an Online Reference. Version 5.6 (January 9, 2013) . American Museum of Natural History, New York, USA. on-line
Larson, Allan. 1996. Rhyacotritonidae. Torrent salamanders . Version January 01, 1996 in The Tree of Life Web Project

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Dunn, ER 1920. Notes on two Pacific Coast Ambystomidae. Proceedings of the New England Zoological Club. Cambridge, Massachusetts 7: 55-59.

Web links

Commons : Rhyacotriton - collection of images, videos and audio files

[Dunn-1] ↑ ^a ^b ^c ^d ^e ^f ^g Dunn, ER 1920. Notes on two Pacific Coast Ambystomidae. Proceedings of the New England Zoological Club. Cambridge, Massachusetts 7: 55-59.