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Cerberus schneiderii (SCHLEGEL, 1837)

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Higher TaxaHomalopsidae, Colubroidea, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesSoutheast Asian Bockadam 
SynonymElaps boaeformis SCHNEIDER 1801: 301
Hurria schneideriana DAUDIN 1803 (nom. subst. pro Elaps boaeformis)
Coluber schneiderianus — DAUDIN 1803
Homalopsis molurus H. BOIE 1826
Python boaeformis — MERREM 1820: 89
Cerberus Russelii CUVIER 1828 [fide DUMÉRIL et al. 1854: 979]
Homalopsis schneideri SCHLEGEL 1837: 171 (nom. nov. pro Coluber schneideriana DAUDIN [not Coluber schneiderii, as stated by SCHLEGEL])
Homalopsis schneideri — SCHLEGEL & MÜLLER
Homalopsis rhinchops (sic) — CANTOR 1847
Cerberus acutus GRAY 1849:65
Cerberus boaeformis — DUMÉRIL & BIBRON 1854: 978
Homalopsis boaeformis — JAN 1863
Cerberus boaeformis — BLEEKER 1857:238
Cerberus rhynchops — GÜNTHER 1864: 279
Cerberus rhynchops [sic]— BOULENGER 1894: 84
Hurria rynchops — STEJNEGER 1907: 304
Cerberus schneiderii — MURPHY et al. 2012
Cerberus schneideri — BROWN et al. 2013
Cerberus schneiderii — MURPHY & VORIS 2014: 13
Cerberus schneiderii — WALLACH et al. 2014: 155 
Distributioncoastal areas of Thailand, Malaysia, Gulf of Thailand, Cambodia, S Vietnam, Indonesia (Ambon, Waingapu, Sumba Island, Borneo, Sumatra, Java, Komodo, etc.), Philippines (Jagoliaou I., Bohol Province, Palawan, Luzon, Cebu, Dinagat Island), Singapore

Type locality: Timor. Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionviviparous 
TypesLectotype: RMNH 1173 (designated by MURPHY et al. 2012)
Holotype: BMNH 1946.1.2.34. [Cerberus acutus GRAY 1849] 
CommentSynonymy: partly after MURPHY et al. 2012 (see there for more details). There are three names that could possibly become senior synonyms of Cerberus schneiderii: Elaps boaeformis Schneider 1801, Boa moluroides Schneider 1801 and Coluber obtusatus Reinwardt 1823. The first two names have published descriptions, with no collector or type locality given, the holotype of Elaps boaeformis is said to be in the University of Halle Museum (now the Central Magazine Naturwissenschaftlicher collection or CNS). And, the specimen of Boa moluroides was reportedly in the collection of the University of Jena’s museum (now the Phyletic Museum).

Distribution: see map in MURPHY et al. 2012, Figure 1. May have been erroneously reported from Borneo, but not present there fide I. Das (pers. comm. 17 March 2013).

Diagnosis. Cerberus schneiderii can be distinguished from all other members of the genus by its 23 (rarely 25) scale rows at midbody; the imbricate plate-like scales on the crown have a flat, thin appearance and lack keels anterior to angle of jaw; the last upper labial is horizontally divided; the venter is mottled. Cerberus australis has 23 scale rows at mid-body but the first upper labial does not contact the loreal (it usually does so in all other Cerberus species). Cerberus dunsoni has 23 scale rows at mid-body, but it has rounded juxtaposed scales on the crown, and a uniform black venter. Cerberus microlepis has 27–31 scale rows at mid-body. Cerberus rynchops usually has 25 scale rows at mid-body (rarely 23); the last two upper labials are horizontally divided (as opposed to one in C. schneiderii) [MURPHY et al. 2012].

Diet: fish 
References
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