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Agkistrodon russeolus GLOYD, 1972

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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Cantil, Mexican Moccasin
G: Mexikanische Mokassinschlange
S: Cantil Pinto 
SynonymAgkistrodon bilineatus russeolus GLOYD 1972
Agkistrodon russeolus — PORRAS et al. 2013 
DistributionMexico (Campeche, Yucatan, Quintana Roo), N Guatemala, N Belize

Type-locality: "11.7 km. north of Piste, Yucatan, Mexico."  
Reproductionviviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: KU 70905 
DiagnosisDiagnosis: From A. b. bilineatus this subspecies is distinguished by the following attributes: the presence of conspicuous light areas of ground color between crossbands; cheek stripe, bases of crossbands and ventrolateral spots dark chestnut brown, broadly edged with white, the white extending onto ventral scutes; belly light along midline and with numerous white markings irregularly distributed; light lines on sides of head relatively narrow, the upper especially so, the lower extending across the centers of the supralabials anteriorly then descending to their lower margins posteriorly. The white does not extend over the greater part of the supralabials as in A. b. taylori. From A. b. taylori this form is distinguished by the narrow light Une on the supralabials bordered by dark below, and by the higher number of subcaudals. [from Agkistrodon bilineatus russeolus GLOYD 1972] 
CommentVenomous!

Similar species: Agkistrodon howardgloydi and A. russeolus are genetically very similar (Alencar et al. 2016).

Synonymy: WALLACH et al. 2014 lists this species as synonym of A. bilineatus.

Distribution: See maps in Trutnau (2001) and Porras et al. 2013. 
References
  • Alencar, Laura R.V.; Tiago B. Quental, Felipe G. Grazziotin, Michael L. Alfaro, Marcio Martins, Mericien Venzon, Hussam Zaher 2016. Diversification in vipers: Phylogenetic relationships, time of divergence and shifts in speciation rates. Molecular Phylogenetics and Evolution 105: 50–62 - get paper here
  • Bolanos, R., & MONTERO, J. R. 1971. Agkistrodon bilineatus Günther from Costa Rica. Revista de Biologia Tropical 16 [1970]: 277-279. - get paper here
  • Burger, W.L. & Robertson,W.B. 1951. A new subspecies of the Mexican moccasin, Agkistrodon bilineatus. Univ. Kansas Sci. Bull. 34 (5): 213-218 - get paper here
  • Calmonte, T. 1982. Agkistrodon bilineatus taylori - ein selten imprtierter Dreieckskopf aus Mexiko. Herpetofauna 4 (20): 26-27 - get paper here
  • Campbell, J.A. & Lamar, W.W. 1989. The Venomous Reptiles of Latin America. Comstock Publishing/Cornell University Press, Ithaca
  • Castro-Franco, R. & Guadalupe Bustos Zagal, M. 2004. Additional records and range extensions of reptiles from Morelos, México. Herpetological Review 35 (2): 196-197 - get paper here
  • Charruau, Pierre, Armando H. Escobedo-Galvan, Juan-Manuel Koller González and Marcos A. Morales-Garduza. 2014. Geographical Distribution: Agkistrodon russeolus (Yucatecan cantil). Herpetological Review 45 (4): 662 - get paper here
  • Conant, R. 1984. A new subspecies of the pit viper Agkistrodon bilineatus (Reptilia: Viperidae) from Central America. Proc. Biol. Soc. Washington 97: 135-141 - get paper here
  • Cruz, G.; Wilson, L.D.; Espinosa, J. 1979. Two ADDITIONS TO THE REPTILE FAUNA OF HONDURAS) EUMECES MANAGUAE DUNN AND AGKISTRODON BILINEATUS (GUNTHER)) WITH COMMENTS ON PELAMIS PLATURUS (LINNAEUS). Herpetological Review 10 (1): 26-27 - get paper here
  • Dunaev E.A., Orlova V.F. 2003. Diversity of snakes (on the materials of the exposition of the Zoological Museum of the Moscow State University). Moscow: Moscow State University Press, 376 pp
  • Gloyd, H. and Conant, R. 1943. A synopsis of the American forms of Agkistrodon (Copperheads and Moccasins). Bull. Chicago Acad. Sci. 7: 147-170
  • Gloyd, H. K. 1972. A subspecies of Agkistrodon bilineatus (Serpentes: Crotalidae) on the Yucatán Peninsula, México. Proc. Biol. Soc. Washington 84: 327-334. - get paper here
  • Gower, D.; Garrett, K. & Stafford, P. 2012. Snakes. Firefly Books, Buffalo, NY,<br />144 p..
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  • Meléndez, Lester 2012. Reptilienerinnerungen à la Guatemala. Terraria-Elaphe 2012 (3): 40-41 - get paper here
  • ORTIZ-MEDINA, JAVIER A.; JESÚS ISAAC VINAJERA-SOSA, J. ROGELIO CEDEÑO-VÁZQUEZ & VICENTE MATA-SILVA. 2022. AGKISTRODON RUSSEOLUS (Yucatecan Cantil). PREDATION. Herpetological Review 53 (2): 333–334.
  • Pachmann, A. 2012. Baumschleichen statt Blumen. Reptilia (Münster) 17 (98): 16-17 - get paper here
  • Parkinson,C.L. 1999. Molecular systematics and biogeographical history of pitvipers as determined by mitochondrial ribosomal DNA sequences. Copeia 1999 (3): 576-586 - get paper here
  • Parkinson,C.L., Zamudio, K.R. & Greene, H.W. 2000. Phylogeography of the pitviper clade Agkistrodon: historical ecology, species status and conservation of cantils. Molecular Ecology 9: 411-420 - get paper here
  • Penner, J. 2001. Der grösste Schlangenzoo Lateinamerikas - ein Praktikum im “World of Snakes” Grecia, Costa Rica. Elaphe 9 (4): 81-85
  • Porras LW, Wilson LD, Schuett GW, Reiserer R.S. 2013. A taxonomic reevaluation and conservation assessment of the common cantil, Agkistrodon bilineatus (Squamata: Viperidae): a race against time. Amphibian & Reptile Conservation 7 (1): 48–73 - get paper here
  • Porras, L.W. & Solórzano, A. 2006. Costa Rica’s venomous snakes. Reptilia (GB) (48): 11-17 - get paper here
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  • Schmidt, Karl P.;Shannon, Frederick A. 1947. Notes on amphibians and reptiles of Michoacan, Mexico. Zoological Series of Field Museum of Natural History 31 (9): 63-85
  • Smith, Hobart M. and David Chiszar 2001. A new subspecies of Cantil (Agkistrodon bilineatus) from Central Veracruz, Mexico (Reptilia: Serpentes). Bull. Maryland Herp. Soc. 37 (4): 130-136 - get paper here
  • Trutnau, L. 1984. Ein Beitrag zur Kenntnis des Kupferkopfs - Agkistrodon contortrix (LINNAEUS 1766). Herpetofauna 7 (35): 14-26 - get paper here
  • Trutnau, L. 2001. Einige Bemerkungen zur Biologie, Pflege und Nachzucht der mexikanischen Giftschlangenart Agkistrodon bilineatus GÜNTHER 1863. Herpetofauna 23 (131): 5-14 - get paper here
  • Webb, R.G. 1984. Herpetogeography in the Mazatlán-Durango Region of the Sierra Madre Occidental, Mexico. Vetrebrate Ecology and Systematics - A ribute to Henry S. Fitch; Museum of Natural History, University of Kansas, Lawrence, pp. 217-241
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
 
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