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Chironius leucometapus DIXON, WIEST & CEI, 1993

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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesYellow-headed Sipo 
SynonymChironius fuscus leucometapus DIXON, WIEST & CEI 1993
Chironius leucometapus — HOLLIS 2006
Chironius leucometapus — SOUZA-FILHO et a. 2012
Chironius leucometapus — WALLACH et al. 2014: 161 
DistributionPeru (Huanuco, Junin, San Martin), 500–3500 m elevation

Type locality: “Peru, Depanmenl of Junin, Chanchamayo”  
Reproductionoviparous. 
TypesHolotype: AMNH 53317 
CommentDiagnosis: “has a while or dirty yellow forehead, without a dark postocular stripe, and without enlarged spines proximally in the spinous portion of the hemipenis” [DIXON et al. 1993: 125].

Distribution: see map in DIXON et al. 1993: 111. 
EtymologyNamed after Latin “fuscus”, meaning dark or dusky. 
References
  • Dixon J R; Wiest J A Jr; Cei J M 1993. Revision of the Neotropical snake genus Chironius Fitzinger (Serpentes, Colubridae). MUSEO REGIONALE DI SCIENZE NATURALI MONOGRAFIE (TURIN) 13 :1-280
  • Hollis, J.L. 2006. Phylogenetics of the genus Chironius Fitzinger 1826 (Serpenes, Colubridae) based on morphology. Herpetologica 62 (4): 435-452 - get paper here
  • Souza Filho, G.A.; J.C. Moura-Leite; Matias, E.G.; S.A.A. Morato 2012. Chironius fuscus (Linnaeus, 1758) (Serpentes: Colubridae): Distribution extension, new state record and variation in southern Brazil. Check List 8(6):1315-1318 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
 
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