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Hologerrhum dermali BROWN, LEVITON, FERNER & SISON, 2001

IUCN Red List - Hologerrhum dermali - Endangered, EN
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Higher TaxaCyclocoridae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Dermal’s Cylindrical Snake; Crombie’s Stripe-lipped Snake 
SynonymHologerrhum dermali BROWN, LEVITON, FERNER & SISON 2001
Hologerrhum dermali — GAULKE 2011: 284
Hologerrhum dermali — WALLACH et al. 2014: 334 
DistributionPhilippines (Panay)

Type locality: 1500 m elevation in the area known locally as “Hang-gud Tubig” (“Big Water”), on the western face of Mt. Madja-as, Barangay Alojipan, Municipality of Culasi, Antique Province, Panay Island, Philippines.  
Reproductionoviparous 
TypesHolotype: PNM 2711 
DiagnosisDiagnosis: Hologerrhum dermali can be readily distinguished from its congener. H. philippinum. by (1) the presence of 7-10 (vs. 12-30) pairs of dark spots in nuchal and dorsal regions. (2) a bright yellow (vs. pale orange to reddish salmon) venter, (3) presence (vs. absence) of a black midventral stripe, (4) bright white labials with midlabial black stripe (vs. cream or yellow labials; midlabial stripe absent), (5) dorsum dark purplish brown (vs. tan to dark orangish brown or dark brick red). (6) chin and throat of adults dark purplish brown with black and while ocelli (vs. pale tan to orange, immaculate or with faint white spots in some specimens). (7) pretemporal absent or much reduced (length less than half that of secondary temporal: vs. pretemporal invariably present and enlarged), and (8) posterior portions of parietals squared oft. with no medial cleft at parietal suture (vs. posterior tips of parietals pointed, extending caudally to form a medial inverted V-shaped cleft) (Brown et al. 2001: 17) 
Comment 
EtymologyNamed after Ronal “Dermal” Crombie. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Brown, Rafe M., Alan E. Leviton, John W. Ferner and Rogelio V. Sison 2001. A new snake of the genus Hologerrhum Günther (Reptilia; Squamata; Colubridae) from Panay Island, Philippines. Asiatic Herpetological Research. 9:9-22 - get paper here
  • Ferner, John W., Rafe M. Brown, Rogelio V. Sison and Robert S. Kennedy 2000. The amphibians and reptiles of Panay Island, Philippines. Asiatic Herpetological Research 9: 1-37 - get paper here
  • Gaulke, M. 2011. The herpetofauna of Panay Island, Philippines. Edition Chimaira, 390 pp.
  • Gaulke, M. 2019. Zur Schlangenfauna der philippinischen Insel Panay. Elaphe 2019 (2): 46-57
  • O’Shea, M. 2018. The Book of Snakes. Ivy Press / Quarto Publishing, London, - 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.
  • Weinell, Jeffrey L.; Errol Hooper, Alan E. Leviton, Rafe M. Brown 2019. Illustrated Key to the Snakes of the Philippines. Proc. Cal. Acad. Sci. (4) 66 (1): 1-49 - get paper here
 
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