Mo's Stout Newt; Pachytriton de Mo
Species Description: Nishikawa K, Jiang J-P, Matsui M 2011 Two new species of Pachytriton from Anhui and Guangki, China (Amphibia: Urodela: Salamandridae). Current Herpetology 30:15-31.
© 2011 Kanto Nishikawa (1 of 1)
Pachytriton moi can be distinguished from P. inexpectatus by its longer snout, larger body, and wider head. It also has the longest vomerine tooth series. Juveniles of P. moi also have a longer snout than P. inexpectatus and have more finely scattered ventral markings (Nishikawa et al. 2011).
In life, adults are uniformly dark brown on the dorsal side of the body and lighter brown with small orange spots on the ventral side. They are slightly light orange on the underside of the tail. Juveniles may have orange spots on dorsolateral regions and finely scattered orange or reddish-orange markings on the ventral side. In preservative, the dorsal brown fades to a lighter brown, and the orange ventral spots fade to a cream color (Nishikawa et al. 2011).
The species authority stated that the juveniles varied slightly from adults but did not specify how (Nishikawa et al. 2011).
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
Pachytriton species are known to be territorial in captivity and bite marks and scars were found on wild caught Pachytriton moi indicating the same may be true in this species. Territoriality may also explain why Pachytriton moi is able to live in sympatry with Pachytriton inexpectatus, as this is the only known instance of sympatry in Pachytriton species (Nishikawa et al. 2011).
Trends and Threats
Relation to Humans
Possible reasons for amphibian decline
General habitat alteration and loss
It was differentiated from other species by a combination of morphological characteristics and phylogenetic analysis using mitochondrial cytochrome b gene. It was placed in the family Salamandridae, subfamily Pleurodelinae, and the genus Pachytriton. Pachytriton moi forms the third major distinct clade of Pachytriton; the other two clades consist of Clade I: P. granulosis, P. brevipes, P. feii, P. archospotus, and P. sp (an undescribed pet shop species) and Clade II: P. inexpectatus (Nishikawa et al. 2011).
The species epithet, moi is in honor of Mr. Yun-Ming Mo of the Guangxi Natural History Museum and who was instrumental in field surveys and faunal diversity (Nishikawa et al. 2011).
The genus, Pachytriton, is endemic to the People’s Republic of China (Nishikawa et al. 2011).
The species within the genus, Pachytriton, may have experienced several instances of introgression (Nishikawa et al. 2011).
Nishikawa, K., Jiang, J.P., Matsui, M. (2011). ''Two new species of Pachytriton from Anhui and Guangki, China (Amphibia: Urodela: Salamandridae).'' Current Herpetology, 30, 15-31.
Written by Brenda Yee (brendayee AT berkeley.edu), UC Berkeley
First submitted 2015-05-19
Edited by Ann T. Chang (2015-05-19)
Species Account Citation: AmphibiaWeb 2015 Pachytriton moi: Mo's Stout Newt; Pachytriton de Mo <http://amphibiaweb.org/species/7677> University of California, Berkeley, CA, USA. Accessed Jan 23, 2019.
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Citation: AmphibiaWeb. 2019. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 23 Jan 2019.
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