Rhyacotriton
Rhyacotriton | ||||||||||||
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Rhyacotriton variegatus |
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Systematics | ||||||||||||
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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
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.