Description
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37.5 mm SVL. Nostrils very enlarged (hence the specific epithet megarhinus), long snout, elongated limbs (meeting when adpressed), long tail, moderate webbing. Nasolabial protuberances well-developed. Males have numerous maxillary teeth and a well-developed mental gland. Coloration dark brown to light reddish brown, sometimes with two dorsolateral stripes running from the posterior corner of the upper eyelid to the tip of the tail. A white interocular bar may be present. An indistinct dark triangular marking may be visible on the head, with the base between the eyes and the apex pointing toward the snout tip. Belly more pigmented in juveniles and males (Rabb 1960; Raffaëlli 2007).
- Parra-Olea, G., and Wake, D. B. (2008). Dendrotriton megarhinus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 16 February 2009.
- Rabb, G. B. (1960). ''A new salamander of the genus Chiropterotriton from Chiapas, Mexico, with notes on related species.'' Copeia, 1960, 304-311.
Distribution and Habitat
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This species is known only from Cerro Tres Picos, Mexico, in extreme southern Chiapas, between 2100 and 2425 m asl. It has a very restricted distribution, with the total area of occurrence approximately 41 square km, in a remote area on the north, southwest and near the summit of Cerro Tres Picos. Found in humid cloudforest with bromeliads (Raffaëlli 2007).
Life History, Abundance, Activity, and Special Behaviors
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Dendrotriton megarhinus was common in the area in the 1970s (Parra-Olea and Wake 2008). Its habitat is in a remote area and remains relatively intact (Parra-Olea and Wake 2008). The type series was collected from within large terrestrial water-filled bromeliads of species (Tillandsia grandis or Vtiesia werckliana), in high-elevation cloudforest up to 300 m below the peak's summit (Rabb 1960). Specimens were collected during a resurvey of the area in 2009 (D. B. Wake, pers. comm.). This species breeds by direct development (Parra-Olea and Wake 2008).
Life History, Abundance, Activity, and Special Behaviors
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This species occurs in a protected area, Reserva de la Biósfera La Sepultura (Parra-Olea and Wake 2008). However, it is classified as Vulnerable due to its small area of occurrence.
Dendrotriton megarhinus
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Dendrotriton megarhinus, also known as the longnose bromeliad salamander or long-nosed bromeliad salamander, is a species of salamander in the family Plethodontidae. It is endemic to southwestern Chiapas, Mexico, where it is only known from the Cerro Tres Picos, the type locality.[3]
Description
The type series consists of eight specimens. The three males that could be reliably sexed measure 25–33 mm (0.98–1.30 in) in snout–vent length. Similarly, the two females with reliable sex measure 23 and 26 mm (0.91 and 1.02 in) in snout–vent length. The tail is somewhat longer or equal to the body length, with the largest type measuring 72 mm (2.8 in) in total length. The snout is elongate and have extremely large nostrils (to which the specific name megarhinus refers). The body is slender. The digits have relatively broad tips and show a variable degree of webbing. The alcohol-preserved specimens are dorsally dark brown with some darker and light mottling along the middle of the back and tail. The venter is dirty cream.[2]
Habitat and conservation
The habitat of Dendrotriton megarhinus is cloud forest at an elevation of about 2,000 m (6,600 ft) above sea level. It lives in terrestrial bromeliads.[1][2] It was common within its small range in the 1970s, but more recent information is lacking. There are no direct threats to this species but its small range renders it vulnerable to stochastic events. It is protected by law in Mexico and occurs in the La Sepultura Biosphere Reserve.[1]
References
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Dendrotriton megarhinus: Brief Summary
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Dendrotriton megarhinus, also known as the longnose bromeliad salamander or long-nosed bromeliad salamander, is a species of salamander in the family Plethodontidae. It is endemic to southwestern Chiapas, Mexico, where it is only known from the Cerro Tres Picos, the type locality.
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