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Pseudorabdion talonuran BROWN, LEVITON & SISON, 1999

IUCN Red List - Pseudorabdion talonuran - Vulnerable, VU

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Higher TaxaColubridae, Calamariinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Panay Island Reed Snake 
SynonymPseudorabdion talonuran BROWN, LEVITON & SISON 1999
Pseudorabdion talonuran — DORIA & PETRI 2010
Pseudorabdion talonuran — GAULKE 2011: 311
Pseudorabdion cf. talonuran — BROWN et al. 2013
Pseudorabdion talonuran — WALLACH et al. 2014: 608 
DistributionPhilippines (Panay, Luzon)

Type locality: Western foothills of Mt. Madja-as (11°23’N, 122°09’ E, elev. 1500 m), Barangay Allojipan, Municipality of Culasi, Antique Province, Panay Island, Philippines.  
Reproductionoviparous 
TypesHolotype: PNM 2712 
DiagnosisDiagnosis: Elongate loreal (= Iori-ocular) present, extending from the posterior border of the nasal to the orbit of the eye; ventrals (M) 139-146; subcaudals (M) 36-39; total of ventrals plus subcaudals (M) 175-185; scales of dorsum each edged with a mottling of brown pigment, the posterior and central portions of each scale pale, lacking a dense infusion of dark pigment, the lateral and latero-ventral scales with larger pale areas than those on the dorsum; no distinct nuchal collar but pattern of pale centers and dark rims characterizes nuchal scales and head shields, which are somewhat mottled dark and light. Pseudorabdion talonuran belongs to the section of the genus Pseudorabdion characterized by the presence of a loreal (lori-ocular) shield. From the allied Philippine P. mcnamarae, it differs in lacking a pale nuchal color in adults and in having more than 30 subcaudals in both males and females; from P. taylori it differs in having the centers and apical tips of the dorsal scales nearly pigmentless whereas in P. taylori the centers are pale brown, and in having the hemipenes minutely spinose (in P. taylori the apical tips are calyculate). Among the non-Philippine species having a lori-ocular, P. talonuran differs from P. sarasinorum in having the anterior chin shields in contact with the mental, from P. albonuchalis in having fewer subcaudals (36-39 vs. 43) and the frontal not border the eye, and from P. saravacensis in having a greater number of subcaudals (36-39 vs. fewer than 30) and fewer maxillary teeth (8 vs. 14). From the remaining species in the genus, it differs in having an elongate loreal (lori-ocular) shield that borders the eye (Brown et al. 1999). 
Comment 
EtymologyNamed after the words “talon” (= forest) and “uran” (= rain) in the Philippine dialect Caray-a, in reference to the high elevation rain forest habitat where the new species was collected on Mt. Madja-as. 
References
  • Brown, Rafe M.; Leviton,A.E. & Sison,R.V. 1999. Description of a new species of Pseudorabdion (Serpentes: Colubridae) from Panay Island, Philippines with a revised key to the genus. Asiatic Herpetological Research 8: 07-12 - get paper here
  • Brown; Rafe; Cameron Siler, Carl Oliveros, Luke Welton, Ashley Rock, John Swab, Merlijn Van Weerd, Jonah van Beijnen, Dominic Rodriguez, Edmund Jose, Arvin Diesmos 2013. The amphibians and reptiles of Luzon Island, Philippines, VIII: the herpetofauna of Cagayan and Isabela Provinces, northern Sierra Madre Mountain Range. ZooKeys 266 (2013) Special Issue: 1-120<br />doi: 10.3897/zookeys.266.3982 - get paper here
  • Doria, G. & Petri, M. 2010. PSEUDORABDION IN THE MUSEUM OF GENOVA WITH DESCRIPTION OF TWO NEW SPECIES FROM SUMATRA AND A REVISED KEY TO THE GENUS. Annali del Museo Civico di storia naturale “G. Doria” 102: 187-201
  • 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.
  • 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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