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Leptotyphlops jacobseni BROADLEY & BROADLEY, 1999

IUCN Red List - Leptotyphlops jacobseni - Least Concern, LC
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Higher TaxaLeptotyphlopidae, Leptotyphlopinae, Leptotyphlopini, Typhlopoidea, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Jacobsen’s Thread Snake 
SynonymLeptotyphlops jacobseni BROADLEY & BROADLEY 1999: 19
Glauconia nigricans ROUX 1907: 730 (not SCHLEGEL)
Glauconia conjuncta FITZSIMONS 1930: 39 (not JAN) (part.)
Leptotyphlops nigricans nigricans — BROADLEY & WATSON 1976 (part.)
Leptotyphlops nigricans nigricans — JACOBSEN 1989
Leptotyphlops jacobseni — BROADLEY & WALLACH 2007: 57
Leptotyphlops jacobseni — ADALSTEINSSON, BRANCH, TRAPE, VITT & HEDGES 2009
Leptotyphlops jacobseni — WALLACH et al. 2014: 368
Leptotyphlops jacobseni — STANDER 2023: 309 
DistributionRepublic of South Africa

Type locality: Buffelsvley, 388KT Lydenburg District, Mpumalanga Province, South Africa (24°52’S, 30°19’E).  
Reproductionoviparous 
TypesHolotype: DNMNH (= TM) 57919 
DiagnosisDiagnosis: Skull with a single parietal bone. A sibling species of L. nigricans, distinguished by its higher number of middorsal scales., i.e. 244-289 vs 202-260, it also has a shorter tail and attains a larger size. It is endemic to the Afromontane zone in the Northern and Mpumalanga Provinces of South Africa, being separated by a gap of 700 km from L. nigricans, which occurs at low altitudes in the south of the country. (Broadley & Broadley 1999)


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Comment 
EtymologyNamed after Niels Jacobsen, who suggested in his 1989 thesis that this population might warrant subspecific status. 
References
  • 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.
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Broadley, D.G. & WATSON,G. 1976. A revision of the Worm Snakes of South-eastern Africa (Serpentes: Leptotyphlopidae). Occ. Pap. nation. Mus. Rhodesia Bulawayo, (BS) 1976: (8): 465-510
  • 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
  • Hedges, S.B., Marion, A.B., Lipp, K.M., Marin, J. & Vidal, N. 2014. A taxonomic framework for typhlopid snakes from the Caribbean and other regions (Reptilia, Squamata). Caribbean Herpetology 49: 1–61 - get paper here
  • Jacobsen, N. H. G. 1989. A herpetological survey of the Transvaal. Unpubl. thesis, Univ. Natal, South Africa
  • Roux,J. 1907. Beiträge zur Kenntnis der Fauna von Süd-Afrika. VIII. Ophidia. Zool. Jahrb., Abt. Syst., Geogr. Biol. Tiere (Jena), 25: 732-741 - get paper here
  • Stander, R.I. 2023. The Reptiles of the Limpopo Province and Kruger National Park. Herp Nomad, Polokwane, South Africa, 367 pp. - get paper here
  • Tolley, K.A., Conradie, W., Pietersen, D.W., Weeber, J., Burger, M. & Alexander, G.J. (eds) 2023. Conservation status of the reptiles of South Africa, Eswatini and Lesotho. Suricata 10. South African National Biodiversity Institute, Pretoria
  • 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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