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Gonyosoma hainanense PENG, ZHANG, HUANG, BURBRINK & WANG, 2021

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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Hainan rhinoceros snake
Chinese: 海南尖喙蛇 (Bopomofo: hǎi nán jiān huì shé) 
SynonymGonyosoma hainanense PENG, ZHANG, HUANG, BURBRINK & WANG in PENG et al. 2021 
DistributionChina (Hainan Province: Diaoluoshan Mountains, Jianfengling Mountains)

Type locality: Diaoluoshan Mountains  
Reproductionoviparous with a clutch size of six (white) eggs and an incubation period of 62 days (20 April–21 June 2019).  
TypesHolotype: ANU 20190002 (collection number: HSR 2010074), adult female (Figure 1B–F), captured by H. Yang and M. Hou in the summer of 2010 from Diaoluoshan (N18°39′58.57″, E109°54′50.48″; elevation of 204 m a.s.l.), Hainan, China.
Paratypes (five specimens): One subadult (ANU 20190003, collection number: HSR 2012105, Supplementary Figure S1D, E), sampled by Y.W. Zhu and L.F. Peng from Diaoluoshan, Hainan, China, in the summer of 2012. One male and one subadult (HNU20190001–2, dead on road), collected by Y. Zhang and J.C. Wang on 28 April 2019 from the same site as the holotype. One adult female and one male (HNU 20190003–4), collected by J.C. Wang in the summer of 2010 from Diaoluoshan, Hainan, China, elevation ~900 m a.s.l. 
DiagnosisDiagnosis: The new species, Gonyosoma hainanensis sp. nov., can be distinguished by the following characters: (1) Long pointed rostral appendage covered with small smooth scales; (2) SVL 652–927 mm in adults; (3) Dorsal scales slightly keeled, 19-19-15(13); (4) Ventral and subcaudal scales strongly angulated laterally; (5) Ventral scales 216–221; (6) Subcaudals paired, 122–135; (7) Anal plate divided; (8) One preocular, two postoculars; (9) Supralabials 9/9, fourth to sixth in contact with eye; (10) Infralabials 10–12, first five in contact with first pair of chin shields; (11) Temporals 2+2+3 (rarely 2+3+3); (12) Black orbital stripe absent in adults; (13) Two loreals oriented longitudinally (Peng et al. 2021).


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CommentActivity: arboreal and nocturnal 
EtymologyThe specific name refers to the province of its type locality, i.e., Hainan Island, Hainan Province, China. 
References
  • Peng, Li-Fang; Yong Zhang, Song Huang, Frank T. Burbrink, Jin-Min Chen, Mian Hou, Yi-Wu Zhu, Hang Yang, Ji-Chao Wang 2021. A new snake species of the genus Gonyosoma Wagler, 1828 (Serpentes: Colubridae) from Hainan Island, China. Zoological Research, 42(4), 487-491 - get paper here
 
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