Browsing by Author "Conradie, Werner"
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- ItemA biogeographical appraisal of the threatened South East Africa Montane Archipelago ecoregion(2024-03-14) Bayliss, Julian; Bittencourt‑Silva; Gabriela B.; Branch, William R.; Bruessow, Carl; Collins, Steve; Congdon, T. ; Colin E.; Conradie, Werner; Curran, Michael; Daniels, Savel R.; Darbyshire, Iain; Farooq, Harith; Fishpool, Lincoln; Grantham, Geofrey; Magombo, Zacharia; Matimele, Hermenegildo; Monadjem, Ara; Monteiro, Jose; Osborne, Jo; Saunders, Justin; Smith, Paul; Spottiswoode, Claire N.; Taylor, Peter J.; Timberlake, Jonathan; Tolley, Krystal A.; Tovela, Érica; Platts, Philip J.
- ItemA comprehensive phylogeny of night adders (Causus)(2025-11-20) Tolley, Krystal A; Barends , Jody M; Greenbaum, Eli; Conradie, Werner
- ItemAfrican Herald snakes, Crotaphopeltis, show population structure for a widespread generalist but deep genetic divergence for forest specialists(2020-01-08) Branch, William R; Greenbaum, Eli; Conradie, Werner
- ItemThe Angolan bushveld lizards, genus Heliobolus Fitzinger, 1843 (Squamata: Lacertidae): Integrative taxonomy and the description of two new species(2022-09-01) Marques, Mariana P.; Ceríaco, Luis MP; Heinicke, Matthew P.; Chehouri, Rachal M.; Conradie, Werner; Bauer, Aaron M.
- ItemAnother Angolan Namib endemic species: a new Nucras Gray, 1838 (Squamata: Lacertidae) from south-western Angola(2020-02-07) Branch, William R.; Conradie, Werner; Vaz Pinto, Pedro
- ItemDiversifying into the branches: Species boundaries in African green and bush snakes, Philothamnus (Serpentes: Colubridae)(2019-01-15) Branch, William R.; Greenbaum, Eli; Alexander, Graham J.; Jackson, Kate; Burger, Marius; Conradie, Werner; Kusamba, Chifundera; Zassi-Boulou, Ange-Ghislain
- ItemExcessive red tape is strangling biodiversity: research in South Africa(2021-09-01) Alexander, Graham J; Maritz, Bryan; McKechnie, Andrew; Manger, Paul; Thompson, Robert L.; Schradin, Carsten; Fuller, Andrea; Meyer, Leith; Hetem, Robyn S.; Cherry, Michael; Conradie, Werner; Bauer, Aaron M.; O'Riain, Justin; Parker, Daniel M.; Mlambo, Musa C.; Bronner, Gary; Madikiza, Kim; Engelbrecht, Adriaan; Lee, Alan T.K.; van Vuuren, Bettine J.; Mandiwana-Neudani, Tshifhiwa G.; Pietersen, Darren; Venter, Jan A.; Somers, Michael J.; Slotow, Rob; Strauss, W. Maartin; Humphries, Marc S.; Ryan, Peter G.; Kerley, Graham I.H.
- ItemExploration into the hidden world of Mozambique’s sky island forests: new discoveries of reptiles and amphibians(2016-09-26) Conradie, Werner; Bittencourt-Silva, Gabriela B.; Loader, Simon P.; Menegon, Michele; Nanvonamuquitxo, Cristóvão; Scott, Michael
- ItemExtensions to the known geographic distributions of reptiles in the Great Karoo, South Africa(2022-04-30) Alexander, Graham J; Conradie, Werner; Jordaan, Adriaan; Kemp, Luke; Rebelo, Alexander D
- ItemFive years onwards, filling the ‘Transkei gap’: an updated checklist of the herpetofauna found in the Eastern Cape forest and adjacent grasslands(SANBI, 2018-05-13) Conradie, Werner; Venter, Jan
- ItemGenetic structuring in Psammophylax (Fitzinger 1843), a widespread African snake genus(SANBI, 2018-05-13) Keates, Chad; Edwards, Shelley; Conradie, Werner; Kelly, Chris
- ItemNew species of Mongrel Frogs (Pyxicephalidae: Nothophryne) for northern Mozambique inselbergs(2018-02) Conradie, Werner; Bittencourt-Silva, Gabriela B.; Farooq, Harith M.; Loader, Simon P.
- ItemNo safe haven: Protection levels show imperilled South African reptiles not sufficiently safe-guarded despite low average extinction risk(2019-02-25) Maritz, Bryan; Verburgt, Luke; Bates, Michael F.; Conradie, Werner; Hofmeyr, Margaretha D.; Turner, Andrew A.; da Silva, Jessica M.; Alexander, Graham J.
- ItemPhylogenetic relationship in the slug-eater snakes, Duberria (Lamprophiidae)(SANBI, 2018-05-13) Edwards, Shelley; Conradie, Werner; Kelly, Christopher; Greenbaum, Eli
- ItemA phylogeny and genus-level revision of the African file snakes Gonionotophis Boulenger (Squamata: Lamprophiidae)(2018-03-13) Broadley, Donald G.; Conradie, Werner; Wishart, Sarah; Trape, Jean- François; Burger, Marius; Kusamba, Chifundera; Zassi- Boulou, Ange-Ghislain; Greenbaum, Eli
- ItemResolving species boundaries in the phenotypically diverse Bradypodion ventrale group(2023-01-16) Main, Devon; Dube, Keith; van Vuuren, Bettine J; Conradie, WernerDwarf chameleons of the genus Bradypodion are a phenotypically diverse group of southern African endemics that underwent a rapid radiation beginning approximately 6 Mya. The phenotypic variation characterizing the youngest clades is thought to be due to ecologically driven diversification, resulting in convergent ecomorphological states across the different clades, but with divergent ecomorphological states between closely related taxa. For example, the Bradypodion ventrale species complex includes several described species (B. ventrale occurring in diverse shrubby habitats, and B. taeniabronchum, B. baviaanense and B. barbatulum occurring in montane fynbos), with an undescribed candidate species from the fynbos habitat at Groendal Nature Reserve in the Eastern Cape Province, South Africa. Mitochondrial DNA was able to fully resolve the status of most species in the complex; however, the status of the Groendal population is unclear. This population is parapatric with B. ventrale but occupies a very different habitat and has a seemingly different morphology. Nevertheless, because the two are closely related, there may still be sufficient gene flow detected between them, blurring species boundaries. To investigate whether the two populations could be considered separately evolving lineages, we combined fine-scale genetic markers (microsatellites) and a suite of morphological measurements to assess the differences between these populations. Data from 18 microsatellite loci revealed distinct genetic structure between B. ventrale and the Groendal chameleons, suggesting there is no present-day gene flow between them. The morphological evidence showed the Groendal chameleons to be similar to B. ventrale for overall head shape, but diverse in terms of tail, casque and limb size showing more similarity to B. taeniabronchum. Given that Groendal chameleons are genetically and morphologically different from B. ventrale, we suggest that gene flow between these species has ceased due to an ecological barrier, allowing the Groendal chameleons to undergo ecological diversification and placing them as a separately evolving population that is in the early stage of speciation.
- ItemA revision of Angolan species in the genus Pedioplanis Fitzinger (Squamata: Lacertidae), with the description of a new species(2021-09-06) Parrinha, Diogo; Marques, Mariana P.; Heinicke, Matthew P.; Khalid, Farkhanda; Parker, Kelly L.; Childers, Jackie L.; Conradie, Werner; Bauer, Aaron M.; Ceriaco, Luis M.P.
- ItemSouth African Animal Checklist for Reptiles(2023-03-30) Khoza, Thembile; Tolley, Krystal; Conradie, Werner; Pietersen, Darren; Alexander, Graham; Maake, Pholoshi; Mailula, Raesetsa; Mashinini, Lemmy
- ItemSouth African reptile species and their phylogenetic richness not sufficiently safe-guarded(2019-09-09) Maritz, Bryan; Verburgt, Luke; Bates, Michael F.; Conradie, Werner; Hofmeyr, Margaretha D.; Turner, Andrew A.; Alexander, Graham J.African reptiles are under threat primarily due to habitat loss as a result of agriculture, resource extraction, and urbanisation. Extinction risk of South African reptiles was assessed as of 2018 using IUCN criteria and we ‘backcast’ these assessments to infer extinction risk circa 1990. A Red List Index (RLI: a measure of the extinction risk for a group of species) for 1990 and 2018 was estimated, and the protection level afforded to South African reptiles was investigated by intersecting reptile distributions with the network of protected areas. Furthermore, phylogenetic diversity of South African reptiles was mapped and intersected with national land cover for 1990 and 2013 to identify areas of high phylogenetic richness that may be impacted by habitat transformation. Level of extinction risk for South African reptiles (ca. 5.4%) is lower than the global average, and most currently threatened species would have already been at risk by 1990. The RLI is slightly lower in 2018 than it was in 1990, and the decrease is more prominent for endemic reptiles than for all reptiles combined. Most South African reptiles fall into the Well Protected category, implying that the protected area network has substantial conservation impact. However, most threatened reptile species are Poorly Protected or Not Protected. The current extent of the protected area network therefore, does not adequately mitigate extinction risk for reptiles. Notably, two South African reptiles are Critically Endangered and in protected areas, two others are already classified as Extinct, and rough estimates of extinction rates are similar to values estimated for other vertebrates. Phylogenetic diversity mapping showed that the greatest historical impacts to phylogenetic richness for reptiles are in the northeast (Limpopo, Mpumalanga, and Gauteng provinces), southwest (Western Cape Province) and the coastal margin of KwaZulu-Natal. By considering additional metrics that are directly guided by our in-depth knowledge of the species, their distributions and the threats, we demonstrate that South African reptiles are under pressure, that risk of extinction is tangible for several species and that phylogenetic richness of reptiles in certain areas of South Africa is imperilled by loss of habitat.
- ItemTaxonomic inflation due to inadequate sampling: are girdled lizards (Cordylus minor species complex) from the Great Karoo one and the same?(2022-01-01) Bates, Michael F.; Conradie, Werner; Makhubo, Buyisile G.; Alexander, Graham J.