Eight new species of Gulella Pfeiffer, 1856 from the south-east coast of South Africa (Gastropoda: Streptaxidae)
Abstract
Eight new species of Gulella Pfeiffer, 1856 are described from south-eastern South Africa, occurring over a linear distance of 550 km within the Maputaland-Pondoland-Albany biodiversity hotspot. Seven species are narrow-range endemics, while Gulella kenbrowni sp. nov. occurs somewhat patchily over most of this distance. The very similar G. fordycei sp. nov. is recorded from only one small nature reserve in medium-altitude mistbelt forest. Six species, G. crookesi sp. nov., G. maraisi sp. nov., G. mkombeni sp. nov., G. abbotti sp. nov., G. donaikeni sp. nov. and G. calcicola sp. nov. each occur at one or a few isolated localities along a narrow strip of 140 km at or near the coast. The latter two are found only in the Marble Delta region, where mining has badly degraded and continues to threaten their habitat, and appear to meet the criteria for Red-Listing as Critically Endangered. Six species occur in nature reserves, highlighting the importance of small pockets of protected habitat for the conservation of terrestrial snails.
References
Aiken D.W. 1981. Differentiation of the radula of South African species of the genus Gulella into three types (Gastropoda Pulmonata: Streptaxidae). Journal of Conchology 30: 317–323.
Aiken D.W. 1995. The Streptaxidae of South Africa. Conchological Society of Southern Africa, Special Publication 6: 1–23.
Brown K.L. 2021. A Guide to the Hunter Shells. Vol.1. The Streptaxoidea. The Gulellinae and Primigulellinae. ConchBooks, Hackenheim, Germany.
Bruggen A.C. van. 2004. Gulella herberti spec. nov. (Gastropoda, Streptaxidae), a new species from Swaziland, southern Africa. Basteria 68: 45–50.
Bruggen A.C. van. 2006. Gulella johannae spec. nov. (Gastropoda, Pulmonata, Streptaxidae), a new land snail from the Drakensberg range in Limpopo Province, South Africa, with notes on G. johannesburgensis (M. & P.). Zoologische Mededelingen 80: 63–72.
Bursey M.L. & Herbert D.G. 2004. Four new narrow-range endemic species of Gulella from Eastern Cape, South Africa (Mollusca: Pulmonata: Streptaxidae). African Invertebrates 45: 249–262.
Cole M.L. 2019. Revision of Chondrocyclus s.l. (Mollusca: Cyclophoridae), with description of a new genus and twelve new species. European Journal of Taxonomy 569: 1–92. https://doi.org/10.5852/ejt.2019.569
Cole M.L. & Herbert D.G. 2009. Description of four new species of Gulella Pfeiffer, 1856 from Eastern Cape, South Africa, with additional notes on two poorly known species (Mollusca: Eupulmonata: Streptaxidae). Zoologische Mededelingen 83: 547–564.
Daniels S.R, Dreyer M. & Sharma P. 2017. Contrasting the population genetic structure of two velvet worm taxa (Onychophora: Peripatopsidae: Peripatopsis) in forest fragments along the south-eastern Cape, South Africa. Invertebrate Systematics 31: 781–796. https://doi.org/10.1071/IS16085
Herbert D.G. 2002. Gulella salpinx sp. n. a new, critically endangered, holoendemic species from the limestone deposits of the Marble Delta, KwaZulu-Natal, South Africa (Mollusca: Gastropoda: Streptaxidae). African Invertebrates 43: 125–138.
Herbert D.G. 2006. Rediscovery of the type species of Euonyma (Subulinidae) and observations on South African species of Gulella (Streptaxidae), with description of two new species (Gastropoda: Eupulmonata). Journal of Natural History 40 (17–18): 1063–1081.
Herbert D.G. 2016. New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae). European Journal of Taxonomy 236: 1–29. https://doi.org/10.5852/ejt.2016.236
Herbert D.G. 2017. A new genus and eight new species of tail-wagger snails from eastern South Africa, with a key to genera within Sheldonia s.l. (Gastropoda: Urocyclidae). European Journal of Taxonomy 309: 1–50. https://doi.org/10.5852/ejt.2017.309
Herbert D.G. 2020. Revision of the aperturally dentate Charopidae (Gastropoda: Sylommatophora) of southern Africa – genus Afrodonta s. lat., with description of five new genera, twelve new species and one new subspecies. European Journal of Taxonomy 629: 1–55.
Herbert D. & Kilburn D. 2004. Field Guide to the Land Snails and Slugs of Eastern South Africa. Natal Museum, Pietermaritzburg, South Africa.
Herbert D.G. & Moussalli A. 2010. Revision of the larger cannibal snails Natalina s. l. of southern Africa – Natalina s.s., Afrorhytida and Capitina (Mollusca: Gastropoda: Rhytididae). African Invertebrates 51 (1): 1–132. https://doi.org/10.5733/afin.051.0101
Moussalli A., Herbert D.G. & Stuart-Fox D. 2009. A phylogeny of the cannibal snails of southern Africa, genus Natalina sensu lato (Pulmonata: Rhytididae): assessing concordance between morphology and molecular data. Molecular Phylogenetics and Evolution 52: 167–182. https://doi.org/10.1016/j.ympev.2009.02.018
Mucina L. & Geldenhuys C.J. 2006. Afrotemperate, subtropical and azonal forests. In: Mucina L. & Rutherford M.C. (eds) The Vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19: 585–614. South African National Biodiversity Institute, Pretoria.
Mucina L., Pienaar E., Van Niekerk A. & Lötter M.C. 2007. Habitat-level Classification of the Albany Coastal, Pondoland Scarp and Eastern Scarp Forests. University of Stellenbosch, Matieland.
Mucina L., Abbott A. & Tichý L. 2018a. Classification of Pondoland scarp forests. In: Mucina L. (ed.) Vegetation Survey and Classification of Subtropical Forests of Southern Africa: 91–124. Geobotany Studies series. Springer, Cham, Switzerland. https://doi.org/10.1007/978-3-319-67831-3_5
Mucina L., Lötter M.C., Tichý L., Siebert S.J. & Scott-Shaw C.R. 2018b. Classification of the Eastern scarp forests. In: Mucina L. (ed.) Vegetation Survey and Classification of Subtropical Forests of Southern Africa: 125–225. Geobotany Studies series. Springer, Cham, Switzerland. https://doi.org/10.1007/978-3-319-67831-3_6
Perera S.J., Herbert D.G., Procheş Ş. & Ramdhani S. 2021. Land snail biogeography and endemism in south-eastern Africa: Implications for the Maputaland-Pondoland-Albany biodiversity hotspot. PLoS ONE 16 (3): e0248040. https://doi.org/10.1371/journal.pone.0248040
Plisko J.D. 1998. New and little-known species of Microchaetus Rapp, 1849, with a key to all species and notes on the significance of certain morphological features (Oligochaeta: Microchaetidae). Annals of the Natal Museum 39: 249–300.
Rowson B. & Herbert D.G. 2016. The type species and circumscription of the species-rich Afrotropical snail genus Gulella L. Pfeiffer 1856, based on anatomical and mtDNA data (Mollusca: Eupulmonata: Streptaxidae). Archiv für Molluskenkunde 145 (1): 69–84.
Rutherford M.C., Mucina L., Lötter M.C. et al. 2006. Savannah biome. In: Mucina L. & Rutherford M.C. (eds) The Vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19: 439–538. South African National Biodiversity Institute, Pretoria.
Steenkamp Y., Van Wyk B., Victor J., Hoare D., Smith G., Dold T. & Cowling R. 2004. Maputaland-Pondoland-Albany. In: Mittermeier R.A., Robles Gil P., Hoffmann M., Pilgrim J., Brooks T., Mittermeier C.G., Lamoreux J. & da Fonseca G.A.B., (eds) Hotspots Revisited: Earth’s Biologically Richest and Most Endangered Ecoregions, South Africa: 219–228. CEMEX, Mexico City.
Van Wyk A.E. & Smith G.F. 2001. Regions of Floristic Endemism in Southern Africa. Umdaus Press, Hatfield.
Von Maltitz G., Mucina L., Geldenhuys C., Lawes M., Eeley H., Adie H., Vink D., Fleming G. & Bailey C. 2003. Classification System for South African Indigenous Forests. Unpublished Report ENV-P-C 2003-017. CSIR, Pretoria.
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