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Type: Article
Published: 2018-06-05
Page range: 89–106
Abstract views: 123
PDF downloaded: 3

Two new species of Acontias (Acontinae, Scincidae) from the Mpumalanga Highveld escarpment of South Africa

Port Elizabeth Museum, P.O. Box 13147, Humewood, 6013, South Africa School of Natural Resource Management, George Campus, Nelson Mandela University, George 6530, South Africa
Department of Botany & Zoology, Private Bag X1, University of Stellenbosch, Matieland, 7602, South Africa
Department of Zoology & Entomology, Rhodes University, Grahamstown, 6139, South Africa
Reptilia biodiversity hotspot conservation cryptic species montane grassland

Abstract

The African genus of fossorial legless lizards (Acontias Cuvier) currently comprises 26 species and subspecies. In a recent study on the two disjunct populations of Acontias breviceps Essex, the presence of cryptic species was discovered. Here, we increase the sampling size and describe these disjunct populations from the Mpumalanga Escarpment of South Africa as new species. The new species differ from congeners based on a combination of factors, including the number of midbody, ventral, and subcaudal scale counts, ventral pigmentation, allopatric distributions, and genetic divergences. The new species are genetically distant from nominal A. breviceps, with which it shares overall pigmentation and scalation. The new description adds to the growing number of Mpumalanga escarpment endemic reptiles, and highlights the area as a biodiversity hotspot. The use of vertebral counts as a distinguishing character between species is briefly discussed.

 

References

  1. Arnold, E.N. (1998) Structural niche, limb morphology and locomotion in lacertid lizards (Squamata Lacertidae); a preliminary survey. Bulletin of the British Museum (Natural History): Zoology, 64, 63–89.

    Bates, M.F., Branch, W.R., Bauer, A.M., Burger, M., Marais, J., Alexander, G.J. & De Villiers, M.S. (2014) Atlas and Red List of the Reptiles of South Africa, Lesotho and Swaziland. Suricata 1. South African National Biodiversity Institute, Pretoria, 485 pp.

    Branch, W.R. (1988) Field Guide to Snakes and Other Reptiles of Southern Africa. 1st Edition. Struik, Cape Town, 327 pp.

    Branch, W.R. (1994) Field Guide to Snakes and Other Reptiles of Southern Africa. 2nd Edition. Struik, Cape Town, 327 pp.

    Branch, W.R. (1998) Field Guide to Snakes and Other Reptiles of Southern Africa. 3rd Edition. Struik, Cape Town, 399 pp.

    Broadley, D.G. & Greer, A.E. (1969) A revision of the genus Acontias (Sauria: Scincidae). Arnoldia, 4, 1–29.

    Bruford, M.W., Hanotte, O., Brookfield, J.F.Y. & Burke, T. (1992) Singlelocus and multilocus DNA fingerprint. In: R Ha, ed. Molecular genetic analysis of populations: a practical approach. IRL Press, Oxford, pp. 225–270.

    Buchholtz, E.A. & Schur, S.A. (2004) Vertebral osteology in Delphinidae (Cetacea). Zoological Journal of the Linnean Society, 140, 383–401.
    https://doi.org/10.1111/j.1096-3642.2003.00105.x

    Busschau, T., Conradie, W., Jordaan, A. & Daniels, S.R. (2017) Unmasking evolutionary diversity among two closely related South African legless skink species (Acontinae: Acontias) using molecular data. Zoology, 121, 72–82.
    https://doi.org/10.1016/j.zool.2016.11.005

    Böhlke, E.B. (1997) Notes on the identity of elongate unpatterned Indo-Pacific morays, with description of a new species (Muraenidae, Subfamily Muraninae). Proceedings of the Academy of Natural Sciences of Philadelphia, 147, 89–109.

    Clark, V.R., Barker, N.P. & Mucina, L. (2011) The Great Escarpment of southern Africa: a new frontier for biodiversity exploration. Biodiversity Conservation, 20, 2543–2561.
    https://doi.org/10.1007/s10531-011-0103-3

    Daniels, S.R., Heideman, N.J.L. & Hendricks, M.G.J. (2009) Examination of evolutionary relationships in the Cape fossorial skink species complex (Acontinae: Acontias meleagris meleagris) reveals the presence of five cryptic lineages. Zoologica Scripta, 38, 49–463.
    https://doi.org/10.1111/j.1463-6409.2009.00387.x

    Engelbrecht, H.M., Van Niekerk, A., Heideman, N.J.L. & Daniels, S.R. (2013) Tracking the impact of Pliocene/Pleistocene sea level and climatic oscillations on the clado-genesis of the Cape legless skink, Acontias meleagris species complex, in South Africa. Journal of Biogeography, 40, 492–506.
    https://doi.org/10.1111/jbi.12024

    de Vienne, D.M., Giraud, T. & Martin, O.C. (2007) A Congruence Index for Testing Topological Similarity between Trees. Bioinformatics, 23 (23), 3119–3124.
    https://doi.org/10.1093/bioinformatics/btm500

    FitzSimons, V.F.M. (1943) The lizards of South Africa. Transvaal Museum Memoir, 1, 1–528.

    Hall, T.A. (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series, 41, 95–98.

    IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. 2nd Edition. IUCN, Gland & Cambridge, 32 pp.

    Jacobsen, N.H.G. (1989) The Distribution and Conservation Status of Reptiles and Amphibians of the Transvaal. Final Project TN 6/4/30, Chief Directorate of Nature and Environmental Conservation, Pretoria, 1621 pp.

    Jacobsen, N.H.G., Kuhn, A.L., Jackman, T.R. & Bauer, A.M. (2014) A phylogenetic analysis of the southern African gecko genus Afroedura Loveridge (Squamata:Gekkonidae) with the description of nine new species from the Limpopo and Mpumalanga provinces of South Africa. Zootaxa, 3846 (4), 451–501.
    https://doi.org/10.11646/zootaxa.3846.4.1

    Kelly, K.C., Arnold, S.J. & Gladstone, J. (1997) The effect of substrate and vertebral number on locomotion in the garter snake Thamnophis elegans. Functional Ecology, 11, 189–198.

    Lamb, T., Biswas, S. & Bauer, A.M. (2010) A phylogenetic reassessment of African fossorial skinks in the subfamily Acontinae (Squamata: Scincidae): evidence for parallelism and polyphyly. Zootaxa, 46, 33–46.

    Maddison, W.P. & Maddison, D.R. (2017) Mesquite: a modular system for evolutionary analysis. Version 3.3. Available from: http://mesquiteproject.org (accessed 4 April 2018)

    McCosker, J.E. (2010) Deepwater Indo-Pacific species of the snake-eel genus Ophichthus (Anguilliformes: Ophichthidae), with the description of nine new species. Zootaxa, 2505, 1–39.

    Palumbi, S. (1996) Nucleic acids II: the polymerase chain reaction. In: Hillis, D.M., Moritz, C. & Mable, B.K. (Eds), Molecular systematics. 2nd Edition. Sinauer Associates, Sunderland, Massachusetts, pp. 205–247.

    Posada, D. (2008) jModelTest: Phylogenetic Model Averaging. Molecular Biology and Evolution, 25, 1253–1256.

    https://doi.org/10.1093/molbev/msn083

    Presch, W. (1975) The evolution of limb reduction in the teiid lizard genus Bachia. Bulletin of the Southern California Academy of Sciences, 74, 113–121.

    R Development Core Team (2014) R: A language and environ-ment for statistical computing. R Foundation for Statistical Computing Vienna, Austria. Available from: http://www.R-project.org (accessed 4 April 2018)

    Rambaut, A., Suchard, M.A., Xie, D. & Drummond, A.J. (2013) Tracer. Version1.5. Rambaut Research Group, University of Oxford. Available from: http://beast.bio.ed.ac.uk/Tracer (accessed 4 April 2018)

    Tamura, K., Stecher, G., Peterson, D., Filipski, A. & Kumar, S. (2013) MEGA6: Molecular Evolutionary Genetics Analysis version 6.0. Molecular Biology and Evolution, 30, 2725–2729.

    https://doi.org/10.1093/molbev/mst197

    Townsend, T.M., Alegre, R.E., Kelley, S.T., Wiens, J.J. & Reeder, T.W. (2008) Rapid development of multiple nuclear loci for phylogenetic analysis using genomic resources: an example from squamate reptiles. Molecular Phylogenetics and Evolution, 47, 129–142.
    https://doi.org/10.1016/j.ympev.2008.01.008

    Uetz, P., Freed, P. & Hošek, J. (2017) The Reptile Database. Available from: http://www.reptile-database.org (accessed 13 August 2017)

    Vanhooydonck, B., Van Damme, R. & Aerts, P. (2002) Variation in speed, gait characteristics and microhabitat use in lacertid lizards. Journal of Experimental Biology 205, 1037–1046.

    Wagner, P., Broadley, D.G. & Bauer, A.M. (2012) A New Acontine Skink from Zambia (Scincidae: Acontias Cuvier, 1817). Journal of Herpetology, 46, 494–502.
    https://doi.org/10.1670/11-055

    Whiting, A.S., Bauer, A.M. & Sites, J.W. (2003) Phylogenetic relationships and limb loss in sub-Saharan African scincine lizards (Squamata: Scincidae). Molecular Phylogenetics and Evolution, 29, 582–598.
    https://doi.org/10.1016/S1055-7903(03)00142-8

    Xia, X. (2013) DAMBE5: a comprehensive software package for data analysis in molecular biology and evolution. Molecular Biology and Evolution, 30 (7), 1720–1728.
    https://doi.org/10.1093/molbev/mst064

    Zwickl, D.J. (2006) Genetic algorithm approaches for the phylogenetic analysis of large biological sequence datasets under the maximum likelihood criterion. Ph.D. dissertation, The University of Texas, Austin, 115 pp.