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Gerrhopilus hedraeus (SAVAGE, 1950)

IUCN Red List - Gerrhopilus hedraeus - Data Deficient, DD

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Higher TaxaGerrhopilidae, Typhlopoidea, Serpentes, Squamata (snakes)
Common NamesE: Negros Island Worm Snake 
SynonymTyphlops hedraea SAVAGE 1950: 49
Typhlops hedraeus — MCDIARMID, CAMPBELL & TOURÉ 1999: 104
Gerrhopilus hedraeus — VIDAL et al. 2010
Gerrhopilus carolinehoserae HOSER 2012
Gerrhopilus hedraeus — WALLACH et al. 2014: 308 
DistributionPhilippines (including Mindanao, Cebu, Camotes, Negros, Luzon, Bohol and Mindoro Islands).

Type locality: “1500 ft. above Luzuriaga, ca. 6 miles southwest of Dumaguete, Oriental Negros, Philippines.”  
TypesHolotype: CAS-SUR 12346, Stanford University 12346 
DiagnosisDiagnosis: “A species of Typhlops readily distinguished from all other members of the genus known from the Indo-Australian area by the combinlation of the following characteristics: snout rounded; no suboculars; preoculars in contact with the second and third supralabials; nasals meeting behind the rostral; nasal suture originating at the second supralabial and passing through the nostril but failing to completely divide the nasal; and 18 rows of scales around the body. T. bramina (with 20 scale rows around the body), T. olivacea (with 20 scale count), and T. suluensis (with 22) approach the new species most closely in this scale count but are easily separated from it by the absence of any contact between the nasals. The only other blind snake from the Philippine Islands with the nasals meeting posterior to the rostral is T. jagorii from Luzon but this form has 28 scale rows around the body.” (Savage 1950: 50).

Detailed DESCRIPTION: see Savage 1950 (OCR imperfect). 
EtymologyThe name hedraea (Gr. = sitting, sedentary) seems 'appropriate for this distinct insular species. 
  • Bosch, H A J. in den & Ineich I. 1994. The Typhlopidae of Sulawesi (Indonesia): A review with description of a new genus and a new species (Serpentes: Typhlopidae). Journal of Herpetology 28 (2): 206-217 - get paper here
  • Hoser, R.T. 2012. A review of the extant scolecophidians (“blindsnakes”) including the formal naming and diagnosis of new tribes, genera, subgenera, species and subspecies for divergent taxa. Australasian J. Herpetol. 15: 1–64. - get paper here
  • Kaiser, H.; Crother, B.I.; Kelly, C.M.R.; Luiselli, L.; O’Shea, M.; Ota, H.; Passos, P.; Schleip, W.D. & Wüster, W. 2013. Best Practices: In the 21st Century, Taxonomic Decisions in Herpetology are Acceptable Only When Supported by a Body of Evidence and Published via Peer-Review. Herpetological Review 44 (1): 8-23
  • McDiarmid, R.W.; Campbell, J.A. & Touré,T.A. 1999. Snake species of the world. Vol. 1. [type catalogue] Herpetologists’ League, 511 pp.
  • Meneses CG, Siler CD, Alviola PA, Gonzalez JCT, Balatibat JB, Natividad CA, Brown RM 2022. Amphibian and reptile diversity along a ridge-to-reef elevational gradient on a small isolated oceanic island of the central Philippines. Check List 18(5): 941-948 - get paper here
  • Savage, J.M. 1950. Two new blind snakes ( genus Typhlops) from the Philippine Islands. Proc. California zool. Club, Palo Alto, 1 : 49-54
  • SUPSUP, Christian E.; Nevong M. PUNA, Augusto A. ASIS, Bernard R. REDOBLADO, Maria Fatima G. PANAGUINIT, Faith M. GUINTO, Edmund B. RICO, Arvin C. DIESMOS, Rafe M. BROWN and Neil Aldrin D. MALLARI 2016. Amphibians and Reptiles of Cebu, Philippines: The Poorly Understood Herpetofauna of an Island with Very Little Remaining Natural Habitat. Asian Herpetological Research 2016, 7(3): 151–179 DOI: 10.16373/j.cnki.ahr.150049 - get paper here
  • Vidal, Nicolas; Julie Marin, Marina Morini, Steve Donnellan, William R. Branch, Richard Thomas, Miguel Vences, Addison Wynn, Corinne Cruaud and S. Blair Hedges 2010. Blindsnake evolutionary tree reveals long history on Gondwana. Biology Letters 6: 558–561 - get paper here
  • Wallach, V. 1996. Two new Blind snakes of the Typhlops ater species group from Papua new Guinea (Serpentes: Typhlopidae). Russ. J. Herpetol. 3 (2):107-118. - 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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