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Phalotris labiomaculatus DE LEMA, 2002

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymPhalotris labiomaculatus DE LEMA 2002
Phalotris labiomaculatus — HAMDAN et al. 2013
Phalotris labiomaculatus — WALLACH et al. 2014: 546 
DistributionN Brazil (Maranhao, Tocantins, Piauí)

Type locality: Esperanya Farm, at Buriti Grande, Porto Franco Municipality, State of Maranhao, Brazil (6.20°5' S - 47.24° W),on Serra da Desordem, at the Cerrado morphoclimatic domain  
Reproductionoviparous 
TypesHolotype: MCP 10693, adult male, sent by Rubens Nobuo Yuki; captured in September 1983. 
DiagnosisDiagnosis. Species similar to Phalolris conca/or shared characters as ratio of total length by head length, high number of ventral scales (,,",ore than 200) and general coloration, but Phalotris /abiomacu/atus differs o f Pha/otris concolor by to be more robust head, sharper rostral plate, larger eyes, very reduced lower postocular, almost indistinct, rectangle like postt;:rior temporal, four infralabial plates contacting the first pair ofchin shield, posterior chin shields slightly smaller than anterior one; larger white nuchal collar, narrower black cervical collar attaining ventral side, supralabial plates strongly blotched with black, mental and gular regions almost immaculate. Pha/otris conc%r has: slender head, rostral shorter and less sharp, eyes smaller, lower postocular smaller than upper, posterior temporal longer and narrower, fourth infralabial just contacting anterior chin shields, posterior chin shields much longer than anterior, white nuchal collar narrower, black cervical collar longer as fourth rows of dorsal scales, supralabial plates almost immaculate, mental and gular regions strongly black blotched. 
Comment 
EtymologyThe name is referent to the black blotches on the labial plates that differ this species from the others ofthe same group. 
References
  • DE LEMA, T. 2002. New species of Phalotris from northern Brazil with notes on the nasutus group (Serpentes: Elapomorphinae). Comunicacoes do Museu de Ciencias e Tecnologia da PUCRS Serie Zoologia, 15(2): 201-214.
  • HAMDAN, BRENO; NELSON JORGE JR DA SILVA, HELDER LUCIO RODRIGUES SILVA 2013. Redescription of Phalotris labiomaculatus (Serpentes, Dipsadidae, Elapomorphini), with notes on the taxonomic boundaries within the nasutus group. Zootaxa 3693 (2): - get paper here
  • Moura, Mario Ribeiro; Henrique Caldeira Costa & Renata Magalhães Pirani 2013. Rediscovery of Phalotris concolor (Serpentes: Dipsadidae: Elapomorphini). ZOOLOGIA 30 (4): 430–436 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
 
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