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Micrurus pachecogili CAMPBELL, 2000

IUCN Red List - Micrurus pachecogili - Data Deficient, DD

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Higher TaxaElapidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Pueblan Coralsnake
S: Coralillo de Puebla 
SynonymMicrurus pachecogili CAMPBELL 2000
Micrurus pachecogili — WALLACH et al. 2014: 452
Micrurus pachecogili — MATA-SILVA et al. 2015 
DistributionMexico (Oaxaca, Puebla)

Type locality: 5.6 km SSW Zapotitlán Salinas, elevation 1494 m, Puebla, Mexico.  
TypesHolotype: UTA R-12546 
DiagnosisDiagnosis. Micrurus pachecogili dif­ fers most notably from other species of Mi­ curus in central Mexico in being tricolored and having black body rings in monads (i.e., a body pattern of red-yellow-black­ yellow-red), in having 220-223 ventrals in males, in possessing a wide pale pariefal ring that includes all of the parietals and portions of adjacent scales, and in having non-melanized red body rings that are about equal to or shorter than black body rings. lndeed, these four characters, in combina­ tion, distinguish M. pachecogili from alt other venomous Mexican coral snakes. Micrurus bemadi differs in having mostly red and black body rings, although a yellow parietal ring and, rarely, narrow yellow edg­ ing may be present along black markings, black rings are usually reduced to dorsal spots or saddlelike bands, and males have" 198-212 ventrals. Micrurus browni differs in having a black nuchal ring that covers the posterior portion of the parietals and adult males have supracloacal keels. In M. b. browni of Guerrero and Oaxaca, the subspe­ eies that is geographically most proximate to Zapotitlan, males have 204-218 ventrals, the black head cap extends to the anterior part of the parietals and frontal, and the black nuchal ring covers the ultimate and penulti­ mate supralabials (versus only the posterior edge of the ultimate supralabial). Micrurus diastema differs in that the red rings are ei­ ther very Iong ( > 5 limes wider than the black rings) or contain scales thai are dis­ tinctly black-tipped, the black head cap in­ cIudes the anterior portion of the parietals and/or the black nuchal ring incIudes the posterior portion of the parietals. Micrurus distans of western Mexico differs in having no more than 17 black body rings, males have ≤217 ventrals, and red body rings are usually at least three times longer than black rings. Micrurus ephippijer differs in having a black nuchal ring that covers the parietal tips, red rings have black-tipped scales, spots, or large saddlelike bands, and :s;219 ventrals in males. Micrurus laticollaris has black body rings arranged in triads (i.e., body pattern of red-black-yellow-black-yel­ low-black-red), has 1 + 2 temporals, and males possess ≤215 ventrals. Micrurus fim­ balUS is bicolored with red and black rings and ≤ 192 ventrals. Overall, the color pattern of M. pachecogili is most similar to that of M. nebularis: simiIarities include red and black rings of relatively equal length, scales in red rings not black-tipped or distinctly spotted, weil developed yellow body rings (1.0-1.5 dorsal scale lengths long in M. ne­ bularis versus 2.0 in M. pachecogili), and tail with subequal black and yellow rings. Micururus nebularis differs by having a black nuchal ring that covers the posterior ends of the parietals, 203-208 ventrals in males, and seven black tail bands (Campbell 2000).

Variation. The paratype (UTA R­-17145) is a subadult male, 327 mm in TL, with a tail length of 36, comprising 11.0% of the total. It agrees with the holotype in most respects of scutellation and pattern, but has 220 ventrals, 43 subcaudals (sub­ caudals 2-3 not divided); a black nuchal ring involving only the first ventral plus ad­ jacent two and one-half preventrals; 27 black body rings, most of which are about four dorsal scales in length throughout the body; red body rings which are two to three dorsal seales in length throughout the body; and 6 black tail rings, exclusive of the black tail tip, which are 1.5-2 times longer than the yellow rings separating them (Campbell 2000). 
EtymologyNamed after the children of E. Pacheco-Gil, who collected the holotype (18°18’ N, 97° 31’ W). 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Campbell, J.A. 2000. A new species of venomous coral snake (Serpentes: Elapidae) from high desert in Puebla, Mexico. Proc. Biol. Soc. Washington 113 (1): 291-297 - get paper here
  • Canseco-Márquez, L., & Gutiérrrez-Mayén, M.G. 2010. Anfibios y reptiles del Valle de Tehuacán-Cuicatlán. Comisión Nacional para el conocimiento y uso de la biodiversidad, México D.F., Mexico, 302 pp - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Mata-Silva, Vicente, Jerry D. Johnson, Larry David Wilson and Elí García-Padilla. 2015. The herpetofauna of Oaxaca, Mexico: composition, physiographic distribution, and conservation status. Mesoamerican Herpetology 2 (1): 6–62 - 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.
  • Woolrich-Piña, G. A., E. García-Padilla, D. L. DeSantis, J. D. Johnson, V. Mata-Silva, and L. D. Wilson. 2017. The herpetofauna of Puebla, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 4(4): 791–884 - get paper here
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