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Sanzinia volontany VENCES & GLAW, 2004

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Higher TaxaBoidae (Sanziniinae, Sanziniidae), Henophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Nosy Komba Tree Boa, Nosy Komba boa
G: Nosy Komba-Hundskopfboa 
SynonymSanzinia madagascariensis volontany VENCES & GLAW 2004
Sanzinia madagascariensis volontany — D’CRUZE et al. 2010
Sanzinia volontany — REYNOLDS et al. 2014
Sanzinia volontany — HYDE-ROBERTS et al. 2014
Sanzinia volontany — REYNOLDS & HENDERSON 2018: 39 
DistributionW Madagascar (Nosy Komba)

Type locality: Ampijoroa (Ankarafantsika Reserve)  
Reproductionviviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: ZSM 804/2001, adult male; paratypes: MNHN 1978.96 and 1978.97, subadult 
DiagnosisDiagnosis: Sanzinia madagascariensis volontany differs from S. m. madagascariensis by a predominantly brownish adult colouration (predominantly greenish in S. m. m.) and a high genetic differentiation in the 16S rRNA gene (Tab. 1) which is nearly twice as high as between Acrantophis madagascariensis and A. dumerilii. Morphologically, there is a tendency of the new subspecies to have a lower number of infralabials, and possibly of supralabials and perioculars (see Tab. 3), but none of these characters can be used as a reliably diagnostic difference (Vences & Glaw 2003: 194) 
CommentSubspecies: Both (sub-) species are parapatric and their distribution areas approach each other only in the very south of Madagascar. Some authors suggested that S. m. volontany should be elevated to specific status despite an apparent lack of diagnostic morphological differences (Orozco-Terwengel et al., 2008, Reynolds et al. 2014).

Synonymy: Listed as synonym of Sanzinia madagascariensis by WALLACH et al. 2014: 661. 
EtymologyThe Malagasy word “volontany” means brown and refers to the predominant ground colour of the subspecies. It is used as invariable noun in apposition. 
References
  • BORA, PARFAIT; J. CHRISTIAN RANDRIANANTOANDRO, ROMA RANDRIANAVELONA, ELISOA F. HANTALALAINA, RAPHALI R. ANDRIANTSIMANARILAFY, DANIEL RAKOTONDRAVONY, OLGA R. RAMILIJAONA, MIGUEL VENCES, RICHARD K. B. JENKINS, FRANK GLAW, AND JÖRN KÖHLER 2010. AMPHIBIANS AND REPTILES OF THE TSINGY DE BEMARAHA PLATEAU, WESTERN MADAGASCAR: CHECKLIST, BIOGEOGRAPHY AND CONSERVATION. Herp. Cons. Biol. 5 (1): 111-125
  • Borer, M. 2019. Auf Schlangensuche in Madagaskar. Reptilia (Münster) 24 (138): 66-79 - get paper here
  • Branch, W. R. 1981. Hemipenes of the Madagascan boas Acrantophis and Sanzinia with a review of hemipeneal morphology in the Boinae. Journal of Herpetology 15 (1): 91-99 - get paper here
  • Cocca, W., G. M. Rosa, F. Andreone, G. Aprea, P. E. Bergò, F. Mattioli, V. Mercurio, J. E. Randrianirina, D. Rosado, M. Vences & A. Crottini 2018. The herpetofauna (Amphibia, Crocodylia, Squamata, Testudines) of the Isalo Massif, Southwest Madagascar: combining morphological, molecular and museum data. Salamandra 54 (3): 178-200 plus Supplementary Material - get paper here
  • Hyde-Roberts, S. & C. Daly 2014. A rapid herpetofaunal assessment of Nosy Komba Island, northwestern Madagascar, with new locality records for seventeen species. Salamandra 50 (1): 18-26 - get paper here
  • Mezzasalma M., F. Andreone, F. Glaw, F.M. Guarino, G. Odierna, A. Petraccioli & O. Picariello 2019. Changes in heterochromatin content and ancient chromosome fusion in the endemic Malagasy boid snakes Sanzinia and Acrantophis (Squamata: Serpentes). Salamandra 55 (2): 140-144 - get paper here
  • Reynolds, R. Graham and Robert W. Henderson 2018. Boas of the World (Superfamily Booidae): A Checklist With Systematic, Taxonomic, and Conservation Assessments. Bulletin of the Museum of Comparative Zoology Sep 2018, Vol. 162, No. 1: 1-58. - get paper here
  • Reynolds, R. Graham; Matthew L. Niemiller, Liam J. Revell 2014. Toward a Tree-of-Life for the boas and pythons: Multilocus species-level phylogeny with unprecedented taxon sampling. Molecular Phylogenetics and Evolution 71: 201–213 [published online in 2013] - get paper here
  • Vences, M. & F. Glaw 2003. Phylogeography, systematics and conservation status of boid snakes from Madagascar (Sanzinia and Acrantophis). Salamandra 39 (3-4): 181-206 - get paper here
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
 
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