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Geophis juarezi NIETO-MONTES DE OCA, 2003

IUCN Red List - Geophis juarezi - Data Deficient, DD

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Benito Juarez's Earth Snake
S: Minadora de Benito Juárez 
SynonymGeophis juarezi NIETO-MONTES DE OCA 2003
Geophis carinosus DOWNS 1967: 81
Geophis juarezi — WILSON & TOWNSEND 2007: 12
Geophis juarezi — WALLACH et al. 2014: 303 
DistributionMexico (Oaxaca)

Type locality: vicinity of Metates, municipality of Santiago Comaltepec, Sierra de Juárez, Oaxaca, Mexico (17° 39’ 03’’ N, 96° 21’ 26’’ W), 900 m elevation.  
Reproductionoviparous 
TypesHolotype: MZFC 2236 
DiagnosisDiagnosis. Geophis juarezi may be distinguished from all species in the G. championi and G. semidoliatus groups and most species in the G. sieboldi group (G. brachycephalus, G. damiani, G. downsi, G. hoffmanni, G. laticollaris, G. nigroalbus, G. petersi, G. pyburni, G. russatus, G. sallaei, and G. talamancae) by dorsals arranged in 17 rows (dorsals in 15 rows in the other species) and from the remaining species in the G. sieboldi group as follows: from G. dunni, by having an uniform dark grayish brown dorsum (dark brown crossbands on a yellowish dorsum in G.dunni); from G. nasalis, by having comparatively numerous subcaudals (49 and 55 in the only female with a complete tail and single known male, respectively, versus 23-33, n = 141 and 29-37, n = 169, in females and males, respectively, of G. nasalis), and from G. sieboldi by having comparativelyfew ventrals (118-124, n = 3, in females and 114 in single known male versus 147-153, n = 2 and 132-147, n = 5, in females and males, respectively, of G. sieboldi). Geophisjuarezi differs from the species in the G. omiltemanus group by having the fifth supralabialand parietal scales in contact (fifth supralabial and parietal scales separated by an anterior temporal in members of the latter group); from the species in the G. chalybeus and G. latifrontalis groups by having paired apical pits well developed at least on the posterior half of the body (apicalpits absent in species of the latter groups); and from the species in the G. chalybeus and G. latifrontalis groups, and all the species in the Geophis dubius group except for G. carinosus, by having strongly keeled dorsal scales on at least the posterior half of the body and tail (dorsals smooth or only faintly keeled above the vent in the other species). Geophis juarezi may be distinguished from G. carinosus by having the frontal and supraocular scales separated or in much narrower contact (ratios 9 and 10, Table 1), posterior chinshields usually separated or in narrow medial contact anteriorly (posterior chin-shields in broader contact anteriorly in G. carinosus; ratio 27, Table 1), fewer ventrals (118-124, n = 3, in females and 114 in single known male versus 125-136, n = 8 and 116-123, n = 6, in females and males, respectively, of G. carinosus), and more subcaudals(49 and 55 in the only female with a complete tail and single known male, respectively, versus 37-43, n = 8 and 45-49, n = 6, in females and males, respectively, of G. carinosus) (Nieto-Montes de Oca 2003). 
CommentAbundance: only known from the specimen(s) described in the original description (fide Campbell et al. 2018)

Similar species: G. carinosus.

Distribution: see map in CANSECO-MÁRQUEZ et al. 2016: 133 (Fig. 1). 
EtymologyNamed after Don Benito Juárez (1806-1872), the Zapotec Indian President of Mexico, born in San Pablo Guelatao in the Sierra de Juárez, Oaxaca. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Canseco-Márquez L, Pavón-Vázquez CJ, López-Luna MA, Nieto-Montes de Oca A 2016. A new species of earth snake (Dipsadidae, Geophis) from Mexico. ZooKeys 610: 131-145. doi: 10.3897/zookeys.610.8605 - 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
  • Nieto-Montes de Oca, A. 2003. A NEW SPECIES OF THE GEOPHIS DUBIUS GROUP (SQUAMATA: COLUBRIDAE) FROM THE SIERRA DE JUÁREZ OF OAXACA, MEXICO. Herpetologica 59 (4): 572-585 - get paper here
  • Townsend, J.H.; Wilson, L.D. 2006. A new species of snake of the Geophis dubius group (Reptilia: Squamata: Colubridae) from the sierra de Omoa of northwestern Honduras. Proc. Biol. Soc. Washington 119 (1): 150–159. - 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.
  • WILSON, L.D. & J.H. TOWNSEND 2007. A checklist and key to the snakes of the genus Geophis (Squamata: Colubridae: Dipsadinae), with commentary on distribution and conservation. Zootaxa 1395: 1-31 - get paper here
 
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