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Pseudorabdion torquatum (DUMÉRIL, BIBRON & DUMÉRIL, 1854)

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Higher TaxaColubridae, Calamariinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymRabdion torquatum DUMÉRIL, BIBRON & DUMÉRIL 1854: 119
Pseudorabdion torquatum — JAN 1862
Pseudorhabdion torquatum — LIDTH DE JEUDE 1890
Pseudorabdion torquatum — VOGEL et al. 2016 
DistributionIndonesia (Sulawesi)

Type locality: Macassar, Sulawesi, Indonesia  
Reproductionoviparous 
TypesLectotype: MNHN-RA 2007.2456, adult male [formerly MNHN-RA 7212A] (SVL 227.0 mm), collected from Macassar, Sulawesi, Indonesia by Dutch naturalists, and donated to MNHN collections by Leiden Museum before 1845, designated by Vogel et al. 2016. 
CommentSynonymy: Boulenger (1894: 329) synonymized torquatum with P. longiceps and this was adopted by most subsequent authors (e.g. by Leviton & Brown 1959, DAVID & VOGEL 1996), until torquatum was resurrected by VOGEL et al. 2016. However, VOGEL et al. 2016 provide no molecular details so the relationship to longiceps remains a bit unclear.

Abundance: probably very rare; only known from the two syntypes.

Similar species: P. longiceps. Both species can be distinguished only by meristic characters (see Diagnosis).

Type species: Rabdion torquatum DUMÉRIL, BIBRON & DUMÉRIL 1854 is the type species of the genus Pseudorabdion JAN 1862.

Diagnosis (genus): The genus Pseudorabdion Jan, 1862 is characterized by the absence of temporals, the presence of internasals and prefrontals, five or six supralabials, five infralabials, 15 dorsal scale rows at mid-body, anal undivided [from DORIA & PETRI 2010].

Diagnosis (species). The following combination of characters distinguishes Pseudorabdion torquatum from all other known congeners: absence of loreal scale, 141 ventrals in the male and 137 in the female [140–165 indicated by Duméril et al. (1854) in the original description], 17 subcaudals in the male and 12 in the female, 11–14 maxillary teeth, supraocular and postocular plates not fused, and internasal not in contact with supralabials. Furthermore, P. torquatum can be clearly distinguished from its closest congener P. longiceps (Table 1) and other congeners of the Pseudorabdion oxycephalum complex according to the data summarized in Table 2 in VOGEL et al. 2016: 341.

Original description: VOGEL et al. 2016 present an English translation of the original French description by DUMÉRIL et al. 1854. 
References
  • Boulenger,G.A. 1885. A list of reptiles and batrachians from the Island of Nias. Ann. Mag. nat. Hist. (5) 16: 388-389 - get paper here
  • Brongersma, L.D. 1947. Zoological Notes from Port Dickson, 1. Amphibians and Reptiles. Zool. Meded. Rijksmus. Nat. Hist. Leiden 27: 300-308 - get paper here
  • 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
  • Cantor. T. E. 1847. Catalogue of reptiles inhabiting the Malayan Peninsula and Islands. J Asiat. Soc., Bengal, Calcutta. 16 (2): 607 - 656, 897-952, 1026 - 1078 - get paper here
  • Chan-ard, T., Parr, J.W.K. & Nabhitabhata, J. 2015. A field guide to the reptiles of Thailand. Oxford University Press, NY, 352 pp. [see book reviews by Pauwels & Grismer 2015 and Hikida 2015 for corrections] - get paper here
  • Das, I. 2012. A Naturalist's Guide to the Snakes of South-East Asia: Malaysia, Singapore, Thailand, Myanmar, Borneo, Sumatra, Java and Bali. Oxford J, ohn Beaufoy Publishing - get paper here
  • David,P. & Vogel,G. 1996. The snakes of Sumatra. An annotated checklist and key with natural history notes. Bücher Kreth, Frankfurt/M.
  • 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
  • Grandison, A.G.C. 1972. The Gunong Benom Expedition 1967. 5. Reptiles and amphibians of Gunong Benom with a description of a new species of Macrocalamus. Bull. Br. Mus. nat. Hist. (Zool.), London, 23: 45-101.
  • Grismer, L. Lee; Chan K. Onn, Jesse L. Grismer, Perry L. Wood, Jr., and A. Norhayati 2010. A CHECKLIST OF THE HERPETOFAUNA OF THE BANJARAN BINTANG, PENINSULAR MALAYSIA. Russ. J. Herpetol. 17 (2): 147-160 - get paper here
  • Grismer, L.L. 2011. Amphibians and reptiles of the Seribuat Archipelago. Edition Chimaira, Frankfurt, 239 pp.
  • Inger, R.F. & A. E. LEVITON 1961. A new colubrid snake of the genus Pseudorabdion from Sumatra. Fieldiana Zoology 44 (5): 45-47 - get paper here
  • Jan, G. 1865. Iconographie générale des ophidiens. 10. Livraison. J.B. Bailière et Fils, Paris - get paper here
  • Lang, R. de & G. Vogel 2005. The snakes of Sulawesi. A field guide to the land snakes of Sulawesi with identification keys. Frankfurter Beiträge zur Naturkunde, 25, Edition Chimaira, Frankfurt am Main, 312 pp.
  • Leviton,A. E. & W. C. Brown, 1959. A review of the snakes of the genus Pseudorabdion with remarks on the status of the genera Agryophis and Typhlogeophis (Serpentes: Colubridae). Proc. Cal. Acad. Sci. 29: 475-508 - get paper here
  • Manthey, U. & Grossmann, W. 1997. Amphibien & Reptilien Südostasiens. Natur und Tier Verlag (Münster), 512 pp. - get paper here
  • Rooijen, J. van & Myriam van Rooijen. 2007. The land snakes of the Santubong Peninsula, Sarawak, Borneo: A preliminary list of species with natural history notes. Russ. J. Herpetol. 14 (1):27-38 - get paper here
  • Rooijen, J. van & Rooijen, M. van 2004. Einige Beobachtungen zur terrestrischen Schlangenfauna auf der Halbinsel Santubong, Sarawak, Ost-Malaysia. Sauria 26 (4): 19-28 - get paper here
  • Smedley, N. 1931. Notes on some Malaysian snakes. Bull. Raffl. Mus. No 5: 49-54
  • Stoliczka,F. 1873. Notes on some species of Malayan Amphibia and reptilia. J. Asiat. Soc. Bengal 42: 111-126 - get paper here
  • Taylor,E.H. 1965. The serpents of Thailand and adjacent waters. Univ. Kansas Sci. Bull. 45 (9): 609-1096 - get paper here
  • Teo, R.C.H. & Rajathurai, S. 1997. Mammals, reptiles and amphibians in the Nature Reserves of Singapore - diversity, abundance and distribution. Proc. Nature Reserves Survey Seminar. Gardens’ Bulletin Singapore 49: 353-425
  • TEYNIÉ, ALEXANDRE; PATRICK DAVID, & ANNEMARIE OHLER 2010. Note on a collection of Amphibians and Reptiles from Western Sumatra (Indonesia), with the description of a new species of the genus Bufo. Zootaxa 2416: 1–43 - get paper here
  • VOGEL, GERNOT; A. A. THASUN AMARASINGHE & IVAN INEICH 2016. Resurrection of Pseudorabdion torquatum (A.M.C. Duméril, Bibron & A.H.A. Duméril, 1854), a former synonym of P. longiceps (Cantor, 1847) (Colubridae: Calamariinae) from Sulawesi, Indonesia Zootaxa 4121 (3): 337–345 - get paper here
 
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