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Omoadiphas aurula KÖHLER, MCCRANIE & WILSON, 2001

IUCN Red List - Omoadiphas aurula - Vulnerable, VU

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
SynonymOmoadiphas aurula KÖHLER, MCCRANIE & WILSON 2001
Omoadiphas aurula — MCCRANIE 2011: 351
Omoadiphas aurula — WALLACH et al. 2014: 505 
DistributionHonduras (Corés)

Type locality: coffee finca near Buenos Aires (15°30.03'N 88°11.13'W, 1250 m elevation, Dep. Corés, Honduras  
TypesHolotype: SMF 78865, female 
DiagnosisDiagnosis/Similar Species. “Omoadiphas aurula can be distinguished from all other Hon­ duran snakes, except O. cannula and O. texiguatensis, by the combination of having smooth dorsal scales in 17 rows throughout the body, no anterior temporal, a divided cloacal scute, and a uniformly brown dorsum or with an indistinct dark brown vertebral stripe. Omoadiphas cannula and O. texiguatensis have six supralabials, seven infralabials, a single postocular, the postnasal contacting the prefrontal, and dark brown to nearly black ventral surfaces (versus seven supralabials, eight infralabials, two postoculars, postnasal separated from prefrontal by loreal, and yellow ventral surfaces in O. aurula).” (McCranie 2011)

Description. “The following is based on two males (UF157664; USNM 562919) and three females (SMF 78865,80647; UF 144905; see Remarks). Omoadiphas aurula is a small, uniformly colored snake (maximum recorded TOL 289 mm [USNM 562919]) with a relatively short tail; head barely distinct from neck; snout moderately elongate, rounded in dorsal outline; rostral not extending posteriorly between internasals, its length from above about one-half that of median internasal suture; internasals large, about one-half as long as prefrontal suture; prefrontals long, their median suture about two-thirds length of frontal; prefrontal bordering eye; frontal longer than wide, widest anteriorly, length about three-quarters that of parietals, in contact with prefrontals, supraoculars, and parietals; supraoculars longer than wide, about one-half length of frontal; parietals long, wide, widest anteriorly, their median suture much longer than frontal; parietals contacting frontal, supraocular, upper postocular, sixth supralabial, secondary temporal, and 5-7 nuchal scales; nasal divided, postnasal much larger than prenasal, their combined lengths slightly less than one-half length of loreal, postnasal contacting loreal, first and second supralabials, and internasal; loreal single, much longer than high, about two-thirds length of snout, about twice as long as eye, bordering eye; preocular absent; postoculars 2, lower smaller than upper; anterior temporal absent, secondary temporal single, above sixth and seventh supralabi­ als; supralabials 7, with third and fourth bordering eye; pupil subcircular; infralabials 8, first pair in contact medially posterior to mental, usually first 4 (occasionally first 5) in contact with anterior chinshields; anterior chinshields paired, over twice as long as wide; posterior chinshields absent, replaced by paired gulars only slightly larger than remaining gular scales; mental groove present; ventrals 159-162 (160.5) in males, 162-170 (164.7+/-4.6) in females; cloacal scute divided; subcaudals 38-39 (38.5) in males, 24-35 (27.7+/-6.4) in females, divided; dorsal scales smooth, in 17 rows throughout body, without apical pits, weak supracloacal ridges present in one male; TOL 273-289 (281.0) mm in males, 210-282 (254.3+38.8) mm in females; SVL 234-248 (241.0) mm in males, 190-247 (227.7+/-32.6) mm in females; TAL/TOL 0.142-0.143 in males, 0.092-0.124 in females.” (McCranie 2011)

Color in life of an adult male (USNM 562919): “dorsum Dusky Brown (19), becom­ ing Fuscous (21) laterally and extending onto lateral edges of ventral and subcaudal scales, indistinct darker brown stripe present on scale row 3; internasals with yellow­ ish green mottling; supralabials yellowish brown below and anterior to Fuscous edges; ventral surface of head yellowish brown; venter of body and tail (except lateral edges) a darker yellow that Spectrum Yellow (55), Fuscous mottling also on subcaudal surface; iris Dusky Brown.” (McCranie 2011) 
CommentType species: Omoadiphas aurula KÖHLER, MCCRANIE & WILSON 2001 is the type species of the genus Omoadiphas KÖHLER, MCCRANIE & WILSON 2001. 
EtymologyFrom the Greek “aurula”, meaning “a gentle breeze”, in reference to the type locality, Buenos Aires, meaning “good wind”. 
  • Köhler, G. 2008. Reptiles of Central America. 2nd Ed. Herpeton-Verlag, 400 pp.
  • KÖHLER, G., L.D. WILSON & J.R. MCCRANIE 2001. A new genus and species of colubrid snake from the Sierra de Omoa of northwestern Honduras (Reptilia, Squamata). Senckenbergiana biologica 81: 269-276
  • 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
  • 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.
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