Species Description: Wake D. B, and Johnson J. D. (1989). “A New Genus and Species of Plethodontid Salamander from Chiapas, Mexico”. Natural History Museum of Los Angeles County, 411, 1-10
© 2007 David Wake (1 of 2)
I. Niger is long and slender, males reaching a maximum of 59.7 mm and females reaching 58.9. The tail is long and strongly tapered. Head is broad and flat with a large amount of very small premaxillary-maxillary teeth (ranging from 78-150). Vomerine teeth are also high in number, ranging from 31-52. The small vomerine teeth are arranged in a long series that is a flattened curve lying almost perpendicular to the midline. Males have a round mental gland that never reaches a diameter of more than one-third the width of the head. Head is broader than the body. A postorbital groove is present posteriorly behind the eye and meets with the nuchal groove. The tongue is not attached anteriorly and is the typical boletoid form found in the supergenus Bolitoglossa.
Coloration in this species is a solid glossy black (by day) to brown (at night). There is a small amount of white pigment in the snout region with red-tinted toe tips (may not be pigment, but rather a lack of pigment which allows for the vascularized tissue underneath to be seen more easily). Nasolabial protuberances are white-tipped.
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
Possible reasons for amphibian decline
General habitat alteration and loss
Wake, D.B., and Johnson, J.D. (1989). ''A new genus and species of plethodontid salamander from Chiapas, Mexico.'' Contributions in Science, Natural History Museum of Los Angeles County, 411, 1-10.
Written by Raul E. Diaz (lissamphibia AT gmail.com), AWeb
First submitted 2004-12-14
Edited by Tate Tunstall (2007-10-01)
Species Account Citation: AmphibiaWeb 2007 Ixalotriton niger <http://amphibiaweb.org/species/4082> University of California, Berkeley, CA, USA. Accessed Dec 7, 2019.
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Citation: AmphibiaWeb. 2019. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 7 Dec 2019.
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