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Metlapilcoatlus borealis TEPOS-RAMÍREZ, FLORES-VILLELA, VELASCO, LARA, GARCÍA-RUBIO & JADIN, 2021

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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymMetlapilcoatlus borealis TEPOS-RAMÍREZ, FLORES-VILLELA, VELASCO, LARA, GARCÍA-RUBIO & JADIN 2021
Metlapilcoatlus nummifer - TAYLOR, 1949
Metlapilcoatlus nummifer - CASTOE et al., 2009
Metlapilcoatlus nummifer - JADIN et al., 2010 
DistributionMéxico (Hidalgo, San Luis Potosí, Querétaro, Northern Veracruz)

Type locality: México, Querétaro, El Pilón (21.4998, -99.1738) 1134 m elevation  
Reproduction 
TypesHolotype: MZFC 35381, adult female, collected by Jacinto Chávez, on 30 June 2015
Paratypes: MZFC 35382, adult male, collected by Jacinto Chávez, on 18 July 2015 
DiagnosisDiagnosis: Metlapilcoatlus borealis is a medium-sized, moderately robust viper (TL: males 657 mm, females 594 mm), has 22–25 rows of scales over the mid part of the body, nasorostral scales 4–6, ventrals 130–132, subcaudals 26–35, supraoculars 8–10, interoculabial 2–3, scales from 21–26 shields at the sides of the body before the cloaca. Additionally, Metlapilcoatlus borealis possess three unique nucleotides for cyt b at positions 21 (C) 369 (A), 378 (A); and three for ND4 at positions 192 (C), 405 (G), and 459 (T) (Tepos-Ramírez et al. 2021).


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CommentVenomous!

Sympatry: probably sympatric with Atropoides nummifer in middle Veracruz

Similar species: M. nummifer, M. mexicanus. 
EtymologyThe specific epithet, borealis, references the northernmost distribution of this taxon with respect to the other taxa of Metlapilcoatlus. 
References
  • Castoe, T. A., J. M. Daza, E. N. Smith, M. M. Sasa, U. Kuch, J. A. Campbell, & C. L. Parkinson. 2009. Comparative phylogeography of pitvipers suggests a consensus of ancient Middle American highland biogeography. Journal of Biogeography 36:88–103 - get paper here
  • Cruz-Elizalde R, Ramírez-Bautista A, Pineda-López R, Mata-Silva V, DeSantis DL, García-Padilla E, Johnson JD, Rocha A, Fucsko LA, Wilson LD. 2022. The herpetofauna of Querétaro, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 16(1) [General Section]: 148–192 (e308) - get paper here
  • Jadin, Robert C.; Ronald L. Gutberlet Jr and Eric N. Smith 2010. Phylogeny, evolutionary morphology, and hemipenis descriptions of the Middle American jumping pitvipers (Serpentes: Crotalinae: Atropoides). J Zool Syst Evol Res 48(4): 360–365; doi: 10.1111/j.1439-0469.2009.00559.x - get paper here
  • Tepos-Ramírez M, Garduño-Fonseca FS, Peralta-Robles CA, García-Rubio OR, Cervantes Jiménez R 2023. Annotated checklist of amphibians and reptiles from Querétaro, Mexico, including new records, and comments on controversial species. Check List 19(2): 269-292 - get paper here
  • Tepos-Ramírez, Mauricio; Oscar Flores-Villela, Julián A. Velasco, Carlos Pedraza Lara, Oscar R. García Rubio & Robert C. Jadin 2021. Molecular Phylogenetics and Morphometrics Reveal a New Endemic Jumping Pitviper (Serpentes: Viperidae: Metlapilcoatlus) from the Sierra Madre Oriental of Mexico. Journal of Herpetology 55 (2): 181-191 - get paper here
 
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