Pseudorabdion torquatum (DUMÉRIL, BIBRON & DUMÉRIL, 1854)
Can you confirm these amateur observations of Pseudorabdion torquatum?
|Higher Taxa||Colubridae, Calamariinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Synonym||Rabdion torquatum DUMÉRIL, BIBRON & DUMÉRIL 1854: 119|
Pseudorabdion torquatum — JAN 1862
Pseudorhabdion torquatum — LIDTH DE JEUDE 1890
Pseudorabdion torquatum — VOGEL et al. 2016
Type locality: Macassar, Sulawesi, Indonesia
|Types||Lectotype: 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.|
|Diagnosis||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.
|Comment||Synonymy: 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.
Key: for a key to the species of Pseudorabdion see Doria & Petri 2010.
Original description: VOGEL et al. 2016 present an English translation of the original French description by DUMÉRIL et al. 1854.