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Namibiana gracilior (BOULENGER, 1910)

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Higher TaxaLeptotyphlopidae, Leptotyphlopinae, Leptotyphlopini, Typhlopoidea, Serpentes, Squamata (snakes)
Common NamesE: Slender Thread Snake 
SynonymGlauconia gracilior BOULENGER 1910: 524
Leptotyphlops gracilior — FITZSIMONS 1946
Leptotyphlops graciliar ISEMONGER (error typographicus) 1962
Leptotyphlops gracilior — MCDIARMID, CAMPBELL & TOURÉ 1999: 32
Leptotyphlops gracilior — BROADLEY & BROADLEY 1999: 13
Leptotyphlops gracilior — BROADLEY & WALLACH 2007: 68
Namibiana gracilior — ADALSTEINSSON, BRANCH, TRAPE, VITT & HEDGES 2009
Namibiana gracilior — WALLACH et al. 2014: 473 
DistributionSW Republic of South Africa, S Namibia.

Type locality: Van Rhynsdorp, Robertson, Clanwilliam, and Matjesfontein, South Africa.  
TypesSyntypes: BMNH 1946.1.16.51; 1946.1.16.93; 10 specimens in South African Museum, Capetown. 
DiagnosisDiagnosis. Distinguished from other members of the group by its combination of high middorsal (308-353) and subcaudal (24-41) scale counts, subtriangular cloacal shield, 10 scale rows on the tail, very slender build (total length/ diameter ratio 69-111; total length/tail length ratio 9.3-18.8) and uniform black colouration. An anterior supralabial is present and the posterior supralabial reaches the level of the eye. Snout rounded. Skull with a wide parietal foramen flanked by partially ossified zones. (Broadley & Broadley 1999) 
  • Adalsteinsson, S.A.; Branch, W.R.; Trapé, S.; Vitt, L.J. & Hedges, S.B. 2009. Molecular phylogeny, classification, and biogeography of snakes of the Family Leptotyphlopidae (Reptilia, Squamata). Zootaxa 2244: 1-50 - get paper here
  • Bates, M.F.; Branch, W.R., Bauer, A.M.; Burger, M., Marais, J.; Alexander, G.J. & de Villliers, M.S. (eds.) 2014. Atlas and Red List of the Reptiles of South Africa, Lesotho, and Swaziland. Suricata 1. South African National Biodiversity Institute, Pretoria, 512 pp.
  • Boulenger, G.A. 1910. A revised list of the South African reptiles and batrachians, with synoptic tables, special reference to the specimens in the South African Museum, and descriptions of new species. Annals of the South African Museum 5: 455-543 - get paper here
  • Broadley, Donald G. & Broadley, Sheila 1999. A review of the Arican wormsnakes from South of Latitude 12°S (Serpentes: Leptotyphlopidae). Syntarsus 5: 1-36
  • Broadley, Donald G. & Wallach, V. 2007. A revision of the genus Leptotyphlops in northeastern Africa and southwestern Arabia (Serpentes: Leptotyphlopidae). Zootaxa 1408: 1–78 - get paper here
  • FitzSimons, V. 1946. An account of the reptiles and amphibians collected on an expedition to the Cape Province, October to December, 1940. Annals Transvaal Mus. 20: 351-377 - get paper here
  • Fitzsimons, V. 1966. A check-list, with syntopic keys, to the snakes of southern Africa. Annals Transvaal Museum 25 (3): 35-79 - get paper here
  • Hahn D. E. & V. WALLACH, 1998. Comments on the systematics of Old World Leptotyphlops (Serpentes: Leptotyphlopidae), with description of a new species. Hamadryad 23: 50-62 - get paper here
  • Herrmann, H.-W.; W.R. Branch 2013. Fifty years of herpetological research in the Namib Desert and Namibia with an updated and annotated species checklist. Journal of Arid Environments 93: 94–115 - get paper here
  • Isemonger 1962. Snakes of Africa -Southern, Central and East. Nelson, Johannesburg 236 pp.
  • McDiarmid, R.W.; Campbell, J.A. & Touré,T.A. 1999. Snake species of the world. Vol. 1. [type catalogue] Herpetologists’ League, 511 pp.
  • 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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