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Phalotris nigrilatus FERRAREZZI, 1993

IUCN Red List - Phalotris nigrilatus - Endangered, EN
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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymPhalotris nigrilatus FERRAREZZI 1993
Elapomorphus nasutus — LAURENT 1974
Phalotris nigrilatus — DE LEMA 2002
Phalotris nigrilatus — MOURA et al. 2013
Phalotris nigrilatus — WALLACH et al. 2014: 547
Phalotris nigirilatus — SMITH et al. 2024 (in error) 
DistributionE Paraguay

Type locality: Carumbé, San Pedro, Paraguay.  
Reproductionoviparous 
TypesHolotype: FML 0709 
DiagnosisDiagnosis: Rostral muito proeminente; temporais 0+ 1, 5° supralabial em contato com a parietal; rostral extremamente desenvolvida e em contato com a préfrontal. Frontal extremamente larga e uma faixa lateral preta larga, contínua, com manchas ventrais escuras, laterais grandes e irregulares; cabeça preta dorsoventralmente; colares nucais indistintos; uma linha preta vertebral fina. (FERRAREZZI 1993)


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CommentP. nigrilatus is characterized by a more melanistic colouration with a wide lateral black stripe continuous with the dark marks on the lateral ventral surface, absence of nuchal colars and differences in head scutelation.

This species is known from only 3 specimens. 
EtymologyNamed after Latin nigrum, black, dark and Latin latus, side; flank. [“...uma faixa lateral preta, larga... »]. (from Esteban Lavilla, pers. comm., May 2024) 
References
  • Cabral, Hugo and Pier Cacciali 2015. A New Species of Phalotris (Serpentes: Dipsadidae) from the Paraguayan Chaco. Herpetologica 72 (1): 72-77. - get paper here
  • Cacciali, P., Mee, G., Laing, A. P., Krause, D., Mclaughlin, C., Montgomery, R. and Smith, P. 2020. Morphological re-examination of the endemic Paraguayan snake Phalotris nigrilatus Ferrarezzi, 1993 (Serpentes: Colubridae: Elapomorphini), with notes on its ecology and conservation status. Current Herpetology 39: 28-37. - get paper here
  • Cacciali, Pier, Santiago Carreira and Norman J. Scott 2007. Redescription of Phalotris nigrilatus Ferrarezzi, 1993 (Serpentes: Colubridae: Xenodontinae). Herpetologica 63 (4): 552-559 - get paper here
  • Cacciali, Pier; Norman J. Scott, Aida Luz Aquino Ortíz, Lee A. Fitzgerald, and Paul Smith 2016. The Reptiles of Paraguay: Literature, Distribution, and an Annotated Taxonomic Checklist. SPECIAL PUBLICATION OF THE MUSEUM OF SOUTHWESTERN BIOLOGY, NUMBER 11: 1–373 - get paper here
  • 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.
  • Entiauspe-Neto, Omar Machado; Arthur Tiutenko, Weverton dos Santos Azevedo, & Arthur Diesel Abegg 2021. Extraordinary claims require extraordinary evidence: on the taxonomic identity of Phalotris cerradensis Silveira, 2020. Revue suisse de Zoologie 128(1): 53-60
  • Ferrarezzi H. 1993. Nota sobre o genero Phalotris com revisao do grupo nasutus e descricao de tres novas especies (Serpentes, Colubridae, Xenodontinae). Mem. Inst. Butantan 55 (SUPPL. 1): 21-38. - get paper here
  • Laurent R F 1974. Sobre la existencia de Elapomorphus nasutus Gomes en el Paraguay. Acta Zoologica Lilloana 31: 65-67
  • 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
  • Smith, P., Maciel, J. ., Redin Hurtado, M. ., Galeano, S. ., Stepan, N. ., Brouard, J.-P. ., Ríos, S. D. ., Ferreira Riveros, M. ., Smith, R. L. ., Owen, M. ., Nicolay, H. ., Derna, R. ., Vera Burró, A. ., Lahaye, T. ., & Cacciali, P. . 2024. Twenty-eight new and significant departmental reptile records for Paraguay Acta Zoológica Lilloana, 347–385 - 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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