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Chironius gouveai ENTIAUSPE-NETO, LÚCIO-LYRA, KOCH, MARQUES-QUINTELA, DIESEL-ABEGG & LOEBMANN, 2020

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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Gouvea’s Sipo
Portuguese: Cobra-cipó de Gouvêa 
SynonymChironius gouveai ENTIAUSPE-NETO, LÚCIO-LYRA, KOCH, MARQUES-QUINTELA, DIESEL-ABEGG & LOEBMANN 2020
Chironius bicarinatus — DIXON et al. 1993: 59
Chironius bicarinatus — ACHAVAL & OLMOS 1997: 68
Chironius bicarinatus — LEMA 2002: 55
Chironius bicarinatus — CARREIRA et al. 2005: 99 (in part, misidentification).
Chironius gouveai — BERNAL & DUBOIS 2023 
DistributionBrazil (Rio Grande)

Type locality: Tapes (30°28’46.7’’S; 51°23’46.1’’W), Rio Grande do Sul, Brazil  
Reproduction 
TypesHolotype: CHFURG 4394 (tissue sample CT2635), collected by Fernando Marques Quintela, an adult male.
Paratypes: ZUFSM 2908, roadkill adult male, collected by Vinícius Caldart and Samanta Iop on 25 April 2011 on Bage ́ municipality, Rio Grande do Sul, Brazil; ZFMK 103132 (Ex-CHFURG 1504; Fig. 6C,D; tissue sample CT453), adult male collected by Daniel Loebmann on 3 February 2012, Rio Grande municipality, Rio Grande do Sul, Brazil; MCP 2631, an adult female collected by Marcos Di-Bernardo on 17 October 1987 at Rodeio Bonito, Sa ̃o Francisco de Paula municipality, Rio Grande do Sul, Brazil; CHFURG 4823, 4824, adult male and female collected by Marcelo Burns on an unknown date of 2016 at Ilha da Torotama, Rio Grande municipality, Rio Grande do Sul, Brazil; MCP 8968 an adult male collected by students of the Gomercinda Dornelles Fountoura school on an unknown date, Encruzilhada do Sul municipality, Rio Grande do Sul, Brazil; MCP 12762, an adult male collected by Felipe Quadros on 24 January 2002 at Corsan-Sitel, Triunfo municipality, Rio Grande do Sul, Brazil. 
DiagnosisDiagnosis: Chironius gouveai is distinguished from all its congeners by the following combination of characters: (1) 12/12/10 dorsal scales; (2) preocular single; (3) two postoculars; (4) loreal present, single, rectangular; (5) temporals 1+1 (rarely 1+2); (6) supralabials 8–10, with fourth to sixth in contact with orbit; (7) 8–10 infralabials, with first to sixth in contact with chin shields; (8) ventrals 153–165 (153–165 in males, 155–164 in females); (9) subcaudals 103–146, paired (129–142 in males, 103–146 in females); (10) dorsal coloration background olive green, with black margins and diffuse blue pigmentation, with two longitudinal black stripes and light yellow vertebral stripe, which gradually dissipates to the tail (in preservative, olive green surfaces turn metallic gray and yellow surfaces turn white); (11) ventral surface immaculate white, with discrete black margins on the ventral scales, second third with olive green background, gradually becoming yellow, and black margins on ventral scales, last third with yellow background coloration and strong black margins, on ventral and subcaudal scales; (12) body length moderate, SVL 170–860 mm; (13) head length moderate, 2.44–5.45% of SVL; (14) tail length large, 47–63% of SVL; (15) hemipenis unilobed, unicalyculate, cylindrical, apex with smooth calyces, with spinules restricted to proximal portion, near the medial area; (16) lacrimal foramen with small projection on the anteroventral margin. (Entiauspe-Neto et al. 2020)


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CommentDistribution: See map in Sudré et al. 2024: 96, 102 (Figs. 5, 8). 
EtymologyThe species etymology gouveai honors Paulo Roberto Cardoso Gouvêa, first author’s grandfather, who is largely responsible for his scientific career, and has been the most significant source of inspiration, ethics, and funding for the author’s research since then. The name is treated as a noun in apposition. 
References
  • Bernal, Rodrigo & Alain Dubois 2023. Chironius scurrula, the correct nomen for Chironius scurrulus (Squamata, Serpentes, Colubridae), with a list of the correct spellings of specific epithets currently in use in this genus. Bionomina 34: 035–044 - get paper here
  • 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
  • Entiauspe-Neto, Omar Machado; Mariana Lúcio Lyra, Claudia Koch, Fernando Marques Quintela, Arthur Diesel Abegg, Daniel Loebmann 2020. Taxonomic Revision of Chironius bicarinatus (Wied 1820) (Serpentes: Colubridae), with Description of a New Species. Herpetological Monographs 34 (1): 98–115. - get paper here
  • Giraudo, A. R. 2002. Serpeintes de la Selva Paranaense y del Chaco Húmedo. L.O.L.A. Buenos Aires [2001]
  • Hoge, A.R.; Romano, S.A.R.W.L. & CORDEIRO, C.L. 1978. Contribuicão ao conhecimento das serpentes do Maranhao, Brasil. Serpentes, Boidae, Colubridae, e Viperidae. Mem. Inst. Butantan 40/41: 37-52 [1976-1977] - get paper here
  • Moura, M.R., Costa, H.C., Abegg, A.D., Alaminos, E., Angarita-Sierra, T., Azevedo, W.S., Cabral, H., Carvalho, P., Cechin, S., Citeli, N., Dourado, A.C.M., Duarte, A.F.V., França, F.G.R., Freire, E.M.X., Garcia, P.C.A., Mol, R., Montero, R., Moraes-d 2022. Unwrapping broken tails: Biological and environmental correlates of predation pressure in limbless reptiles. Journal of Animal Ecology. 92(2):324–337 - get paper here
  • Sudré V, Andrade-Junior A, Folly M, Azevedo JAR, Ávila RW, Curcio FF, Nunes PMS, Passos P 2024. Revision of the Chironius bicarinatus complex (Serpentes: Colubridae): Redefined species boundaries and description of a new species. Vertebrate Zoology 74: 85-120 - get paper here
  • TOZETTI, A. M., MOSER, C. F., & COLOMBO, P. 2023. AMPHIBIANS AND REPTILES OF TAIM, A BRAZILIAN RAMSAR SITE: CURRENT KNOWLEDGE AND A POSSIBLE CASE OF LOCAL EXTINCTION. Herpetological Conservation and Biology, 18(1), 38-47 - get paper here
 
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