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Thamnosophis infrasignatus (GÜNTHER, 1882)

IUCN Red List - Thamnosophis infrasignatus - Least Concern, LC
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Higher TaxaPseudoxyrhophiidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymPtyas infrasignatus GÜNTHER 1882: 263
Dromicus baroni BOULENGER 1888: 104
Liopholidophis thieli DOMERGUE 1972
Liopholidophis thieli — GLAW & VENCES 1994: 338
Liopholidophis infrasignatus — GLAW et al. 2001
Bibilava infrasignatus — GLAW et al. 2007
Thamnosophis infrasignatus — CADLE & INEICH 2008
Thamnosophis infrasignatus — WALLACH et al. 2014: 727 
DistributionMadagascar

Type locality: "Arkafana, Eastern Betsileo." Corrected to Ankafana, Betsileo by Boulenger, 1893a: 247.  
Reproductionoviparous 
TypesLectotype, BMNH 1946.1.7.57 (BMNH 1882.2.25.57), a 920 mm female (W.D. Cowan), designated by Cadle, 1996a: 424. 
DiagnosisDiagnosis: Liopholidophis infrasignatus differs from members of the sexlineatus group in having 19-19-17 dorsal scale rows (vs. 17-17-15). It has a relatively short tail and low numbers of subcaudals compared to other members of the stumpffi group (Table 2). The dorsolateral light stripes are anteriorly on rows 5-6, by which infrasignatus differs from lateralis (rows 3-5) and stumpffi (rows 4-5). Epistibes differs from infrasignatus in having a relatively long tail and higher ventral and subcaudal counts (Table 2 and epistibes account). (Cadle 1996: 426).


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CommentSimilar species: L. stumpffi.

Synonymy: mostly after Cadle 1996: 424. 
EtymologyApparently named after Latin infra (= below) and the adjective signatus (= signed, marked), almost certainly making reference to the typical dark pattern on the ventral side of this snake which is emphasized in the original description. No Etymology given in the original description. 
References
  • Boulenger, G. A. 1888. Descriptions of new Reptiles and Batrachians from Madagascar. Ann. Mag. nat. Hist. (6) 1: 101-107. - get paper here
  • Cadle, J. E. 1996. Snakes of the genus Liopholidophis (Colubridae) from Eastern Madagascar: New species, revisionary notes, and an estimate of phylogeny. Bull. Mus. Comp. Zool. Harvard 154 (5): 369-464. - get paper here
  • Cadle, John E. 2009. Sexual Dimorphism and Reproductive Biology in the Malagasy Snake Genus Liopholidophis (Lamprophiidae: Pseudoxyrhophiinae) Proc. Cal. Acad. Sci. 60 (15): 461–502
  • Cadle, John E.; Ineich, Ivan. 2008. Nomenclatural status of the Malagasy snake genus Bibilava Glaw, Nagy, Franzen, and Vences, 2007: Resurrection of Thamnosophis Jan and designation of a lectotype for Leptophis lateralis Dumeril, Bibron, and Dumeril (Serpentes: Colubridae). Herpetological Review 39 (3):285-288 - get paper here
  • Domergue, C.A. 1972. Étude de trois serpents malgaches: Liopholidophis lateralis (D.&B.), Liopholidophis stumpffi (Boettger) et Liopholidophis thieli n. sp. Bull. Mus. natn. Hist. nat., Paris 103 (77): 1397-1412.
  • Glaw ,F. & Vences, M. 1994. A Fieldguide to the Amphibians and Reptiles of Madagascar. Vences & Glaw Verlag, Köln (ISBN 3-929449-01-3)
  • Glaw, F., M. Franzen & M. Vences 2005. A new species of colubrid snake (Liopholidophis) from northern Madagascar. Salamandra 41 (1-2): 83-90 - get paper here
  • Glaw, F.; Nagy, Z.T.; Franzen, M. & Vences, M. 2007. Molecular phylogeny and systematics of the pseudoxyrhophiine snake genus Liopholidophis (Reptilia, Colubridae): evolution of its exceptional sexual dimorphism and descriptions of new taxa. Zoologica Scripta 36: 291–300 - get paper here
  • Günther,A. 1882. Ninth contribution to the knowledge of the fauna of Madagascar. Ann. Mag. nat. Hist. (5) 9: 262-266 - get paper here
  • Hyde Roberts, S., Sannolo, M., Longosoa, H. T., Clark, R., Jhaveri, L., Rosa, G. M., ... & Crottini, A. 2025. A littoral treasure trove: a comprehensive assessment of the herpetofauna of Sainte Luce, southeastern Madagascar. Systematics and Biodiversity 23(1): 2513472 - 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.
  • Zimmermann, H. 2001. Das erste “deutsche” Naturschutzgebiet in Madagaskar, der “Drachenbaum-Regenwald Maromiza bei Andasibe und seine Herpetofauna. Herpetofauna 23 (134): 28-34 - get paper here
 
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