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Geophis nephodrymus TOWNSEND & WILSON, 2006

IUCN Red List - Geophis nephodrymus - Vulnerable, VU

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymGeophis nephodrymus TOWNSEND & WILSON 2006
Geophis nephodrymus — WILSON & TOWNSEND 2007: 14
Geophis nephodrymus — WALLACH et al. 2014: 304 
DistributionNW Honduras (Sierra de Omoa, Cortés)

Type locality: Sendero Las Minas (15°29.525’N, 88°12.705’W), 1580 m elevation, Parque Nacional El Cusuco, Cortés, Honduras Map legend:
Type locality - Type locality.
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous 
TypesHolotype: UF 142577, a female, Florida State Museum of Natural History collected 11 July 2004 by S. M. Hughes and J. H. Townsend. 
CommentDiagnosis: Geophis nephodrymus has 17 dorsal scale rows throughout the body, distinguishing it from all members of the championi group (G. championi, G. downsi, G. godmani, and G. ruthveni) and semidoliatus group (G. cancellatus, G. juliai, G. laticinctus, and G. semidoliatus), and some members of the chalybeus (G. dugesii, G. nigrocinctus, and G. tarascae), omiltemanus (G. incomptus and G. maculiferus), and sieboldi (G. bellus, G. betaniensis, G. brachycephalus, G. damiani, G. hoffmanni, G. laticollaris, G. nigroalbus, G. petersii, G. russatus, G. ruthveni, G. sallaei, G. talamancae, and G. zeledoni) groups that have only 15 dorsal scale rows throughout the body. Of the remaining members of the chalybeus group, G. bicolor differs from G. nephodrymus in having 2 postocular scales (only 1 postocular in G. nephodrymus), and G. chalybeus has more ventrals (154–155) and subcaudals (38–41) than does G. nephodrymus (120–138 and 22–32, respectively). Geophis nephodrymus is separated from the members of the sieboldi group that possess 17 dorsal scale rows (G. dunni, G. nasalis, G. pyburni, and G. sieboldi), and from some members of the dubius group (G. carinosus, G. juarezi, and G. rostralis) by having smooth dorsal scales throughout the length of the body (dorsal scales keeled on at least the posterior part of the body in those species). Geophis nephodrymus differs from most of the members of the latifrontalis group (G. latifrontalis and G. mutitorques) and the members of the omiltemanus group that have 17 dorsal scale rows (G. isthmicus and G. omiltemanus) by lacking an anterior temporal (anterior temporal present in latifrontalis group [except G. blanchardi] and omiltemanus group). Geophis blanchardi differs from G. nephodrymus by having more ventrals (150–166 versus 120–138 in G. nephodrymus) and usually 7 infralabials (usually 6 infralabials in G. nephodrymus).
Of the remaining species in the dubius group, G. nephodrymus can be differentiated from G. dubius by having internasals that are distinct from the prefrontals (internasals usually fused to prefrontals in G. dubius), from G. anocularis, G. duellmani, and G. rhodogaster by having one supraocular and one postocular (supraocular and postocular absent in G. anocularis and G. duellmani; supraocular absent in G. rhodogaster), from G. immaculatus by having a dark coloration on chin and lateral edges of ventrals (chin and ventral scales immaculate in G. immaculatus), and from G. fulvoguttatus by usually having fewer ventrals (120–138) and a lower segmental count (149–160)(G. fulvoguttatus with 135–157 ventrals, segmental count 171–181) [from TOWNSEND 2006].

Distribution: see map in CANSECO-MÁRQUEZ et al. 2016: 133 (Fig. 1). 
References
  • 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
  • Köhler, G. 2008. Reptiles of Central America. 2nd Ed. Herpeton-Verlag, 400 pp.
  • McCranie J R 2011. The snakes of Honduras. SSAR, Salt Lake City, 725 pp.
  • McCranie, James R. 2015. A checklist of the amphibians and reptiles of Honduras, with additions, comments on taxonomy, some recent taxonomic decisions, and areas of further studies needed. Zootaxa 3931 (3): 352–386 - get paper here
  • Solís, J. M., L. D. Wilson, and J. H. Townsend. 2014. An updated list of the amphibians and reptiles of Honduras, with comments on their nomenclature. Mesoamerican Herpetology 1: 123–144 - get paper here
  • Townsend, J. H. 2006. INVENTORY AND CONSERVATION ASSESSMENT OF THE HERPETOFAUNA OF THE SIERRA DE OMOA, HONDURAS, WITH A REVIEW OF THE Geophis (SQUAMATA: COLUBRIDAE) OF EASTERN NUCLEAR CENTRAL AMERICA. PhD thesis, University of Florida, 138 pp.
  • 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.
  • Townsend, Josiah H. 2009. MORPHOLOGICAL VARIATION IN GEOPHIS NEPHODRYMUS (SQUAMATA: COLUBRIDAE), WITH COMMENTS ON CONSERVATION OF GEOPHIS IN EASTERN NUCLEAR CENTRAL AMERICA. Herpetologica 65 (3): 292-302 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. 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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