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42 results for “Natella”
FIGURE 40 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 40. Distribution of Natella viridescens (Melvill & Ponsonby, 1891). Triangles with a white centre indicate localities for specimens used in DNA analyses (Moussalli & Herbert 2016); contour at 1000 m.
FIGURE 39 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 39. Natella viridescens (Melvill & Ponsonby, 1891), genitalia (NMSA V3177). A, middle and lower portion of genital tract. B, internal structure of penis. Abbreviations: ag, albumen gland; bc, bursa copulatrix; bd, bursa copulatrix duct; fod, free oviduct; ga, genital atrium; m, muscle fibres; p, penis; pf, folds inside penis base; pr, penial retractor muscle; pv, penial verge; sod, spermoviduct; v, vagina; vd, vas deferens.
FIGURE 41. Maps showing the distribution southern African rhytidid taxa. A, Natalina s.l in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 41. Maps showing the distribution southern African rhytidid taxa. A, Natalina s.l. (green triangles = Capitina; blue squares = Afrorhytida; pink circles = Natalina s.s.), from Herbert & Moussalli (2010). B, dwarf cannibal snails, Nata s.l. (black triangles = Nata s.s.; blue triangles = Natella). C, Chlamydephorus slugs. D, Nata spp. in W. Cape in relation to biomes. E, Nata spp. in E. Cape in relation to biomes. F, Nata vernicosa and Nata erugata sp. nov. in relation to biomes.
FIGURE 38 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 38. Natella viridescens (Melvill & Ponsonby, 1891), radula. A, whole width of radula, showing small rachidian tooth, stained with Shirlastain A, Ithala Game Reserve, KwaZulu-Natal (NMSA V2530). B, SEM of half row, Soutpansberg, Limpopo (NMSA V5664). Scale bars: A = 100 µm; B = 50 µm.
FIGURE 35 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 35. Nata watsoni sp. nov., genitalia. A, entire genital tract, minus ovotestis, holotype (NMSA W6266/T2299). B, penial complex, paratype (NMSA W5189/T2272). C, longitudinal dissection of penis to show internal structure, holotype. Abbreviations: ag, albumen gland; bc, bursa copulatrix; bd, bursa copulatrix duct; ep, epiphallus; epp, epiphallus pore; ga, genital atrium; hd, hermaphrodite duct; lpr, longitudinal penis ridge; p, penis; pr, penial retractor muscle; sod, spermoviduct; v, vagina; vd, vas deferens.
FIGURE 36 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 36. Distribution of Nata watsoni sp. nov. Triangles with a white centre indicate localities for specimens used in DNA analyses (Moussalli & Herbert 2016); contour at 1000 m.
FIGURE 37 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 37. Natella viridescens (Melvill & Ponsonby, 1891). A–C, Weenen, KwaZulu-Natal, diameter 4.7 mm (NMSA A7126). D–F, Ithala Game Reserve, KwaZulu-Natal, diameter 5.0 mm (NMSA V3177). G–I, Pretoria, Gauteng, diameter 3.6 mm (NMSA A7122).
FIGURE 34 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 34. Nata watsoni sp. nov., radula. A, entire width of radula. B, recurved rows of teeth at radula margin. C, middle and right side of radula. D, recurved rows of teeth at radula margin. A, B, D, Camdeboo National Park, paratype NMSA W6091/T2303; C, Somerset East, holotype. A, B, stained radula slides; C, D, scanning electron micrographs. Scale bars: A, D = 100 µm; B = 50 µm; C = 250 µm.
FIGURE 33 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 33. Nata watsoni sp. nov. A–C, holotype, Glen Avon Falls, Somerset East, E. Cape, diameter 16.0 mm (NMSA W6266/T2299). D–F, low-spired juvenile, Riebeek East, Grahamstown, diameter 10.5 mm (paratype, NMSA W5189/T2272). G–I, Hankey, diameter 13.6 mm (paratype, NMSA W6524/T3921).
FIGURE 31 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 31. Nata erugata sp. nov., living animals. A, Mapaya Hill, Zastron, Free State, shell diameter 13.2 mm (paratype, NMSA W6573/T3907). B, Tullach-Mohr, Nelspruit area, Mpumalanga, shell diameter 20 mm (MV, ex NMSA W3301).
FIGURE 32 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 32. Nata erugata sp. nov., radula. A, Sudwala, Mpumalanga (NMSA W4473). B, Hogsback E. Cape (NMSA W6654). C, D, Mapaya Hill, Zastron, Free State (paratype, NMSA W6573/T3907). Scale bars = 250 µm.
FIGURE 30 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 30. Nata erugata sp. nov. A–C, holotype, Monk's Cowl Forest, KwaZulu-Natal, diameter 15.5 mm (NMSA W5599/ T3906). D–J, additional specimens from throughout the range of the species [D, Majuba, KwaZulu-Natal, diameter 14.5 mm (paratype, NMSA V5932/T3909). E, Pongola Bush, KwaZulu-Natal, diameter 17.0 mm (paratype, NMSA V776/T3915). F, Phinda Game Reserve, KwaZulu-Natal, diameter 16.2 mm (W1334). G, Balloch, Barkly East, E. Cape, diameter 16.8 mm (paratype, NMSA W4836/T3914). H, Mapaya Hill, Zastron, Free State, diameter 13.2 mm (paratype, W6573/T3907). I, Mariepskop, Mpumalanga, diameter 17.1 mm (W9364). J, Sand River area, Kruger National Park, diameter 15.6 mm (A9759)].
FIGURE 29 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 29. Comparison of distributions of Nata vernicosa (triangles) and Nata erugata sp. nov. (circles). Green symbols indicate localities for specimens used in DNA analyses (Moussalli & Herbert 2016); contour at 1000 m. The isolated population of Nata vernicosa in the Cape Town is considered to be derived from translocated individuals.
FIGURE 27 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 27. Nata vernicosa (Krauss, 1848), radula. A, B, Haven, E. Cape (NMSA W4151). C, D, Mount Sheba, Mpumalanga (NMSA W3344). Scale bars: A, C = 500 µm; B, D = 250 µm.
FIGURE 28 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 28. Nata vernicosa (Krauss, 1848), genitalia (NMSA W9322). A, entire genital tract. B, longitudinal dissection of penis showing papillate lumen. C, dissection of broader basal portion of bursa copulatrix duct showing fine folds on lumen wall. Abbreviations: ag, albumen gland; bc, bursa copulatrix; bd, bursa copulatrix duct; bdf, folds in wall of basal bursa copulatrix duct; ep, epiphallus; epp, epiphallus pore; ga, genital atrium; hd, hermaphrodite duct; p, penis; plp, papillate lumen of penis; pr, penial retractor muscle; sod, spermoviduct; vd, vas deferens.
FIGURE 26 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 26. Nata vernicosa (Krauss, 1848), living animals. A, B, Empisini Nat. Res., Umkomaas, KwaZulu-Natal, shell diameter 15.7 mm and 11.8 mm respectively (NMSA W4399). C, Ferncliffe Nat. Res., Pietermaritzburg, KwaZulu-Natal, shell diameter 16.4 mm (NMSA W6647). D, Vernon Crookes Nat. Res., Umzinto KwaZulu-Natal, shell diameter 14.0 mm (NMSA W8020). E, Umtamvuna Nat. Res., KwaZulu-Natal, shell diameter 18.5 mm (NMSA V2089). F, Irma Booysen Flora Res., Cape St Francis, E. Cape, shell diameter 10.0 mm (NMSA W6382).
FIGURE 25 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 25. Nata vernicosa (Krauss, 1848). A–C, large typical specimen with strong sculpture, Mbotyi, E. Cape, diameter 20.7 mm (NMSA W4119). D–F, large low-spired, weakly sculptured, glossy specimen, liparoxantha morph, Umtamvuna Nat. Res., KwaZulu-Natal, diameter 19.5 mm (NMSA W7901). G–I, strongly sculptured, deep-whorled specimen, Kelso, KwaZulu-Natal, diameter 16.3 mm (NMSA W7940). J–P, additional specimens from throughout the range of the species [J, Lekgalameetse Nat. Res., Limpopo, diameter 20.6 mm (NMSA V5544). K, Mount Sheba, Mpumalanga diameter 16.0 mm (NMSA W3344). L, Hluhluwe Game Res., KwaZulu-Natal, diameter 21.7 mm (NMSA V571). M, Grahamstown, E. Cape, diameter 15.3 mm (NMSA W4198). N, Van Stadens Wild Flower Res., E. Cape, diameter 15.5 mm (NMSA W8359). O, Ferndale, E. Cape, diameter 14.0 mm (NMSA W8436). P, Fig Tree, Addo Elephant Park, E. Cape, diameter 15.9 mm (NMSA W4221)].
FIGURE 24 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 24. Type material of Nata vernicosa and synonyms. A–C, Helix vernicosa Krauss, 1848, lectotype (here designated), diameter 10.2 mm (SMNH 4965). D–F, Helix (Macrocyclis) liparoxantha Melvill & Ponsonby, 1892, lectotype, diameter 18.0 mm (NHMUK 1911.8.8.7). G–I, Helix (Macrocyclis) caenotera Melvill & Ponsonby, 1892, lectotype, diameter 17.0 mm (NHMUK 1911.8.8.8). J–L, Natalina chaplini Melvill & Ponsonby, 1894, lectotype, diameter 10.4 mm (NHMUK 1911.8.8.9). M–O, Helix vernicosa var. minor Pfeiffer, 1853, lectotype, diameter 8.0 mm (SMNH 4965).
FIGURE 23 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 23. Distribution of Nata tarachodes (Connolly, 1912). Triangles with a white centre indicate localities for specimens used in DNA analyses (Moussalli & Herbert 2016); contour at 1000 m.
FIGURE 21 in Revision of the dwarf cannibal snails (Nata s. l.) of southern Africa— Nata s. s. and Natella (Mollusca: Gastropoda: Rhytididae), with description of three new species
FIGURE 21. Nata tarachodes (Connolly, 1912), radula, Grootbos Private Nat. Res., Gansbaai (NMSA W5658). A, whole width of radula. B, half width of radula showing large teeth (numbers 6–8), fang tooth is tooth no 7 in this case. Scale bars: A = 200 µm; B = 100 µm.
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