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Dipsadoboa weileri (LINDHOLM, 1905)

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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Black-tailed tree snake 
SynonymDipsadophidium weileri LINDHOLM 1905
Dipsadoboa isolepis BOULENGER 1907: 325
Dipsadoboa weileri — MÜLLER 1910
Dipsadoboa unicolor — SCHMIDT 1923: 105 (fide RASMUSSEN 1993)
Dipsadoboa weileri — RASMUSSEN 1993: 162
Dipsadoboa weileri — BROADLEY 1998
Dipsadoboa weileri — CHIRIO & INEICH 2006
Dipsadoboa cf weileri — TRAPE & BALDÉ 2014
Dipsadoboa weileri — WALLACH et al. 2014: 232
Dipsadoboa aff. weileri — MONASTERIO et al. 2016
Dipsadoboa weileri — SPAWLS et al. 2018: 531
Dipsadoboa weileri — PAUWELS & COLYN 2023
Dipsadoboa weileri — TRAPE 2023: 452 
DistributionSW Cameroon, Central African Republic, Republic of South Sudan (RSS), Equatorial Guinea, Gabon, Democratic Republic of the Congo (Zaire; except in the SOUTH), Rwanda, Uganda

isolepis: Cameroon, Congo (Brazzaville)

Type locality: Umgegend von Bibundi (Kamerun) [Cameroon].  
Reproductionoviparous 
TypesHolotype: lost, formerly MWNH 1238 (lost in WWII) 
DiagnosisDiagnosis: A West and Central African form of Dipsadoboa which predominantly occurs in lowland rain forest, and which has the following character combination: ventrals 182-203 and 181-205, males and females, respectively; subcaudals single, 56-73 and 56-71, in males and females, respectively; juveniles brownish or grayish above, whitish or yellowish cream below, except for tail being abruptly grayish or blackish; colour becoming dark grayish or blackish above with increasing size, colour of venter invariably pale, except for tail and eventually the most posterior part of body in very large specimens; anal glands extend to subcaudals no. 8-15 and 9-14, males and females, respectively. (Rasmussen 1993)


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CommentSynonymy: Dipsadoboa isolepis is listed as valid species in LeBreton 1999 and mentioned as such by TRAPE & ROUX-ESTÈVE 1995: 41.

Distribution: not in Liberia fide TRAPE & BALDÉ 2014: 320. For a map with localities in Equatorial Guinea see SÁNCHEZ-VIALAS et al. 2022.

Populations from Togo and further west have been described as D. riparia, as announced by Trape & Baldé 2014: “We provisionaly attribute these specimens D. cf. weileiri, although they clearly represent an undescribed species. They differ from typical D. weileiri from Cameroon, Gabon and Congo both by habitat (savanna for all our specimens, central African rainforest block for D. weileri) and colouration in life (dorsum green versus blackish respectively) and in preservative (underside of the tail whitish or pale blue grey versus blackish respectively). In life, the supralabials of our specimens were bright yellow, the belly pale yellow, and the underside of the tail pale yellow or pale greenish. However, we were unable to find clear meristic differences between this undescribed species and D. weileri.” (TRAPE & BALDÉ 2014) 
EtymologyNamed after J. Weiler, who collected reptiles in Tanganyika (now Tanzania) and Cameroon, and gave the collection to Lorenz Müller. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Böhme, Wolfgang, Mark-Oliver Rödel, Christian Brede & Philipp Wagner 2011. The reptiles (Testudines, Squamata, Crocodylia) of the forested southeast of the Republic Guinea (Guinée forestière), with a country-wide checklist. Bonn zoological Bulletin 60 (1): 35-61 - get paper here
  • Boulenger,G.A. 1907. Descriptions of three new snakes discovered by Mr. G.L. Bates in south Cameroon. Ann. Mag. Nat. Hist. (7) 19: 324. - get paper here
  • BRANCH, WILLIAM R.; JULIAN BAYLISS, GABRIELA B. BITTENCOURT-SILVA, WERNER CONRADIE, HANLIE M. ENGELBRECHT, SIMON P. LOADER, MICHELE MENEGON, CRISTÓVÃO NANVONAMUQUITXO, KRYSTAL A. TOLLEY 2019. A new species of tree snake (Dipsadoboa, Serpentes: Colubridae) from ‘sky island’ forests in northern Mozambique, with notes on other members of the Dipsadoboa werneri group. Zootaxa 4646 (3): 541–563 - get paper here
  • Broadley, D.G. 1998. The reptilian fauna of the Democratic Republic of the Congo (Congo-Kinshasa). In: Schmidt, K.P. and Noble, G.K., Contributions to the Herpetology of the Belgian Congo... [reprint of the 1919 and 1923 papers]. SSAR Facsimile reprints in Herpetology, 780 pp.
  • Burger, M.; Branch, W.R. & Channing, A. 2004. Amphibians and Reptiles of Monts Doudou, Gabon: Species Turnover Along an Elevational Gradient. California Academy of Sciences Memoir 28: 145–186
  • Carlino, P. & Pauwels, O.S.G. 2015. An Updated Reptile List of Ivindo National Park, the Herpetofaunal Hotspot of Gabon. Bull. Chicago Herp. Soc. 50(3): 25-39 - get paper here
  • Chippaux, Jean-Philippe & Kate Jackson 2019. Snakes of Central and Western Africa. Johns Hopkins University Press, 448 pp. [detaileld review in HR 51 (1): 161] - get paper here
  • Chirio, L. & Lebreton, M. 2007. Atlas des reptiles du Cameroun. MNHN, IRD, Paris 688 pp.
  • Chirio, Laurent and Ivan Ineich 2006. Biogeography of the reptiles of the Central African Republic. African Journal of Herpetology 55(1):23-59. - get paper here
  • Köhler, J. & Güsten, R. 2007. Herpetological type specimens in the natural history collections of the museums in Darmstadt and Wiesbaden, Germany. Spixiana 30 (2): 275-288 - get paper here
  • LeBreton, Matthew 1999. A working checklist of the herpetofauna of Cameroon. Netherlands Committee for IUCN, 160 pp.
  • Lindholm W.A. 1905. Beschreibung einer neuen Schlangenart (Dipsadophidium weiler g. et sp. n.). Jahrb. nassau. Ver. LVIII: 183-187 - get paper here
  • Monasterio, Camila 2016. The herpetofauna of the Dindefelo Natural Community Reserve, Senegal. Herpetology Notes 9: 1-6 - get paper here
  • Müller,L. 1910. Beiträge zur Herpetologie Kameruns. Abh. bayer. K. Akad. Wiss. 2, 24 (3): 545-626 - get paper here
  • Pauwels, O. S., & Colyn, M. 2023. On a Collection of Snakes from Bengamisa, Right Bank of the Congo River, Northeastern Democratic Republic of the Congo. Bulletin of the Chicago Herpetological Society, 58(6), 81-92
  • Pauwels, O. S., & Colyn, M. 2023. On a Diverse Collection of Snakes from Amadjabe, Left Bank of the Congo River, Northeastern Democratic Republic of the Congo. Bulletin of the Chicago Herpetological Society, 58(3), 34-47 - get paper here
  • Pauwels, O.S.G. & Vande Weghe, J.P. 2008. Les reptiles du Gabon. Smithsonian Institution, Washington: 272 pp. - get paper here
  • Pauwels, O.S.G.; Kamdem Toham, A. & Chimsunchart, C. 2002. Recherches sur l’herpétofaune du Massif du Chaillu, Gabon. Bull. Inst. Roy. Sci. Nat. Belgique (Biologie) 72: 47-57 - get paper here
  • Rasmussen J B 1993. A taxonomic review of the Dipsadoboa unicolor complex, including a phylogenetic analysis of the genus (Serpentes, Dipsadidae, Boiginae). Steenstrupia 19 (4): 129-196
  • SÁNCHEZ-VIALAS, A., CALVO-REVUELTA, M. & DE LA RIVA, I. 2022. Synopsis of the terrestrial Reptiles of Equatorial Guinea. Zootaxa 5202 (1): 1-197 - get paper here
  • Schmidt, K. P. 1923. Contributions to the herpetology of the Belgian Congo based on the collection of the American Museum Congo Expedition, 1909-1915. Part II. Snakes, with field notes by Herbert Lang and James P. Chapin. Bull. Amer. Mus. nat. Hist. 49 (1): 1-146 - get paper here
  • Segniagbeto GLazcano. H., Trape J. F., David P., Ohler A., Dubois A. & Glitho I. A. 2011. The snake fauna of Togo: systematics, distribution and biogeography, with remarks on selected taxonomic problems. Zoosystema 33 (3): 325-360. DOI: 10.5252/z2011n3a4 - get paper here
  • Spawls, S.; Howell, K.; Drewes, R.C. & Ashe, J. 2002. A field guide to the reptiles of East Africa. Academic Press, 543 pp. [reviews in HR 34: 396 and Afr. J. Herp. 51; 147] - get paper here
  • Spawls, Stephen; Tomáš Mazuch & Abubakr Mohammad 2023. Handbook of Amphibians and Reptiles of North-east Africa. Bloomsbury, 640 pp. - get paper here
  • Spawls, Steve; Kim Howell, Harald Hinkel, Michele Menegon 2018. Field Guide to East African Reptiles. Bloomsbury, 624 pp. - get paper here
  • Trape, J.-F. 2023. Guide des serpents d’Afrique occidentale, centrale et d’Afrique du Nord. IRD Éditions, Marseille, 896 pp.
  • Trape, J.F. & R. ROUX-ESTÈVE 1995. Les serpents du Congo: liste commentée et clé de détermination. Journal of African Zoology 109 (1): 31-50
  • TRAPE, JEAN-FRANÇOIS & CELLOU BALDÉ 2014. A checklist of the snake fauna of Guinea, with taxonomic changes in the genera Philothamnus and Dipsadoboa (Colubridae) and a comparison with the snake fauna of some other West African countries. Zootaxa 3900 (3): 301–338 - get paper here
  • TRAPE, Jean-François; Oleg MEDIANNIKOV & Mamadou Cellou BALDÉ 2023. Une nouvelle espèce de couleuvre arboricole du genre Dipsadoboa Günther, 1858 (Squamata : Colubridae : Colubrinae) d’Afrique de l’Ouest. Bull. Soc. Herp. Fr. (2023) 183: 1-13 - 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.
 
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