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FIGURE 15 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 15. Nata dumeticola (Benson, 1851). A–C, lectotype of Helix dumeticola Benson, 1851, 'S. Africa', diameter 11.4 mm (NHMUK 1912.8.16.206–208). D–F, Robben Island, mid-sized specimen, diameter 10.4 mm (NMSA V8258). G, Strandfontein, lenticular subadult specimen, diameter 9.6 mm (NMSA W7522). H, I, Saldanha Bay area, Jacobsbaai, large subglobose specimens, diameter respectively 14.2 mm and 12.8 mm (NMSA V7760). J, Cape Peninsula, Connolly, diameter 9.6 mm (NHMUK 1937.12.30.1360–66).
FIGURE 17 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 17. Nata dumeticola (Benson, 1851), genitalia. A, entire genital tract, minus ovotestis (NMSA V8258). B, internal features of penis (NMSA W3224). Abbreviations: ag, albumen gland; bc, bursa copulatrix; bd, bursa copulatrix duct; ep, epiphallus; epp, epiphallus pore; ga, genital atrium; hd, hermaphrodite duct; p, penis; pil, penis pilaster; pr, penial retractor muscle; sod, spermoviduct; v, vagina; vd, vas deferens.
FIGURE 4 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 4. Living animals of Nata and Natella. A, Nata aequiplicata sp. nov., holotype, Stinkhoutkloof, E. Cape, shell diameter 6.5 mm (NMSA W9248/T3066). B, Nata dumeticola, West Coast National Park, W. Cape, shell diameter 10.8 mm (NMSA W3224). C, Nata erugata sp. nov., Tullach-Mohr, Nelspruit area, Mpumalanga, shell diameter 20 mm (MV ex NMSA W3301). D, Nata tarachodes, Grootbos Private Nat. Res., Gansbaai, W. Cape, shell diameter 7.7 mm (NMSA W5658). E, Nata watsoni sp. nov., Hankey, E. Cape, shell diameter 7.5 mm (paratype NMSA W6524/T3921). F, Nata watsoni sp. nov. Camdeboo National Park, Graaff-Reinet, E. Cape, shell diameter 13.0 mm (paratype, NMSA W6091/T2303). G, Nata vernicosa, Vernon Crookes Nat. Res., KwaZulu-Natal, shell diameter 14.0 mm (NMSA W8020). H, Natella viridescens, Ithala Game Res., KwaZulu-Natal, shell diameter 3.7 mm (NMSA W7263).
FIGURE 19 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 19. Nata tarachodes (Connolly, 1912). A–C, holotype of Natalina tarachodes Connolly, 1912, diameter 7.2 mm (NHMUK 1912.4.27.14). D–F, elevated specimen with distinct axial riblets, Grootbos Private Nat. Res., Gansbaai, W. Cape, diameter 8.0 mm (NMSA W5658). G, depressed specimen, faded, Kalk Bay Mountain, W. Cape, diameter 7.1 mm (SAMC 8299).
FIGURE 14 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 14. Nata caffrula (Melvill & Ponsonby, 1898), type material. A–C, holotype of Natalina caffrula Melvill & Ponsonby, 1898, diameter 11.2 mm (NHMUK 1911.8.8.10). D–F, paratype of Natalina caffrula Melvill & Ponsonby, 1898, diameter 12.5 mm (SAMC 2369).
FIGURE 11 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 11. Nata aequiplicata sp. nov., radula. A, light micrograph of stained preparation, anterior third of radula (paratype, NMSA W9249/T3067). B, outer lateral and marginal teeth, posterior third of radula (holotype). C, rachidian and inner lateral teeth, anterior third of radula (holotype). Specimen A considerably smaller than holotype and radula teeth thus proportionately smaller. Scale bars: A, B = 100 µm; C = 50 µm.
FIGURE 13 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 13. Distribution of Nata aequiplicata sp. nov. Triangles with a white centre indicate localities for specimens used in DNA analyses (Moussalli & Herbert 2016); contour at 1000 m.
FIGURE 16 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 16. Nata dumeticola (Benson, 1851), radula, Saldanha Bay area, Jacobsbaai (NMSA V7760). A, whole width of radula approx. one-quarter to one-third of length from anterior end, the wide median gap is an artefact of preparation. B, right inner latero-marginal series. C, left outer latero-marginal series. Scale bars: A = 250 µm; B, C = 100 µm.
FIGURE 10 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 10. Nata aequiplicata sp. nov. A–C, holotype, diameter 6.5 mm (NMSA W9248/T3066). D–F, paratype, Van Stadens Wild Flower Res., diameter 6.7 mm (paratype, ELM D15970/T032).
FIGURE 9 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 9. Suprapedal gland of Nata and Natella. A, Nata tarachodes, Oubos, W. Cape (NMSA W5671). B, Nata vernicosa Kelso Junction, KwaZulu-Natal (NMSA V7940). C, Natella viridescens, Ithala Game Res., KwaZulu-Natal (NMSA V3177). Abbreviations: cd, central duct; pa, posterior aorta; tb, terminal bulb.
FIGURE 3 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 3. Protoconchs of Nata and Natella. A, Nata dumeticola, Kommetjie, W. Cape (NMSA 2767). B, Nata tarachodes, Spes Bona bush, Cape Peninsula (NMSA V9848). C, Nata vernicosa, Pietermaritzburg, KwaZulu-Natal (NMSA A7114). D, Natella viridescens, Ithala Game Res., KwaZulu-Natal (NMSA V2530). Scale bars = 0.5 mm.
FIGURE 7 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 7. Reproductive tract of Nata and Natella. A, Nata aequiplicata sp. nov. (paratype, NMSA W9249/T3067). B, Nata tarachodes (NMSA W9118). C, Nata dumeticola (NMSA W8258). D, Nata vernicosa (NMSA W9322). E, Nata watsoni sp. nov. (holotype). F, Natella viridescens (NMSA V31770). Abbreviations: ad, atrial diverticulum; ag, albumen gland; bc, bursa copulatrix; ep, epiphallus; ga, genital atrium; hd, hermaphrodite duct; ot, ovotestis; p, penis; sod, spermoviduct; v, vagina; vd, vas deferens.
FIGURE 6 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 6. Radulae of Nata and Natella, automontage light micrographs of half-row portions of stained radula mounts. A, Nata aequiplicata sp. nov., type locality (paratype, NMSA W9249/T3067). B, Nata dumeticola, Jacobsbaai, W. Cape (NMSA V7760). C, Nata erugata sp. nov., Golden Gate Highlands National Park, Free State (paratype, NMSA W4243/T3913). D, Nata tarachodes, Oubos, W. Cape (NMSA W5671). E, Nata watsoni sp. nov., Graaff-Reinet, E. Cape (paratype, NMSA W6091/T2303). F, Natella viridescens, Ithala Game Res., KwaZulu-Natal (NMSA V2530). Scale bars: A = 100 µm; B = 200 µm; C–E = 250 µm; F= 50 µm.
FIGURE 2 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 2. Distribution of Hemicycla (Adiverticula) diegoi n. sp. (․: modern record) and Hemicycla (Adiverticula) mascaensis (●: modern records, Ο: (sub-)fossil record) on Tenerife, Canary Island, Spain. The map is based on the topographical map sheets in the Series L, scale 1:50000, Cartografía Militar de España for Tenerife, UTM (MGRS) coordinates, WGS-84 ellipsoid and datum, zone 28R, 100 x 100 km UTM-squares CS and DS with 5 km grid spacing. Symbols in the map correspond to1 x 1 km UTM-squares.
FIGURE 7 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 7. Scatter plots of some linear shell measurements (see Fig. 1) that are frequently used to compare gastropod species. Black dots: Hemicycla (Adiverticula) diegoi n. sp.; gray dots: H. (A.) mascaensis.
FIGURE 1 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 1. Shell and genital measurements for comparison of Hemicycla (Adiverticula) diegoi n. sp. (A–C) and Hemicycla (Adiverticula) mascaensis (D–E). A, B. Dorsal and lateral view of shell. Dmax = maximum diameter, Dmin = minimum diameter, SH = shell height, SpH = spire height, AH = aperture height, AB = aperture breadth, BWH = body whorl height. C, D. Aperture of shell. AWmax = maximum aperture width, AWmin = minimum aperture width, CW = callus width (C, for shell with open and D, for shell with covered umbilicus). E. Genital system. BC = length of bursa copulatrix, BCD = length of bursa copulatrix duct, DV = length of distal vagina, PV = length of proximal vagina, P = penis length, DEp = length of distal part of epiphallus (from the penis retractor muscle to the proximal end of the penis), PEp = length of proximal part of epiphallus (from the insertion point of the vas deferens to the penis retractor muscle), F = length of flagellum, Vsd = length of vas deferens, MG = length of mucus gland, DS = length of dart sac, SOv = length of spermoviduct, FOv = length of free oviduct, AlG = length of albumen gland.
FIGURE 4 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 4. Hemicycla (Adiverticula) diegoi n. sp. A. living animal from the type locality (scale bar = 10 mm). B. Genital system (scale bar = 5 mm). C. Internal anatomy of the penis (scale bar = 1 mm) with proximal penial papilla (pp), distal penial papilla (dp), contact organ (co) and distal part of epiphallus (ep). D. Dart (scale bar = 1 mm). E. Mandible (scale bar = 1 mm). F–H. Radula teeth (scale bar = 10 μm): marginal teeth (F), outer lateral teeth (G), central and inner lateral teeth (H).
FIGURE 3 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 3. Comparison of shells of Hemicycla (Adiverticula) diegoi n. sp. (holotype) (A–D) and Hemicycla (Adiverticula) mascaensis (E–H). A, E. Shell. B, F. Aperture. C, G. Last whorl sculpture. D, H. Protoconch. (A, E: scale bar = 10 mm; B, F: scale bar = 5mm; C, D, G, H: scale bar = 2.5 mm).
FIGURE 5 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 5. Hemicycla (Adiverticula) mascaensis. A. Living animal from the type locality (scale bar = 10 mm). B. Genital system (scale bar = 5 mm). C. Internal anatomy of the penis (scale bar = 1 mm) with proximal penial papilla (pp), distal penial papilla (dp), contact organ (co) and distal part of epiphallus (ep). D. Dart (scale bar = 1 mm). E. Mandible (scale bar = 1mm). F–H. Radula teeth (scale bar = 10 μm): marginal teeth (F), outer lateral teeth (G), central and inner lateral teeth (H).
FIGURE 6 in Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840
FIGURE 6. Bayesian tree based on COI sequences of 19 specimens from 10 different taxa in the genus Hemicycla and two outgroup taxa. Specimen abbreviations correspond to those listed in Tab. 2. The bold horizontal lines group the Hemicycla species in the two currently recognised subgenera Hemicycla s. str. and Adiverticula. Numbers at nodes indicate posterior probability values as percentages; branch lengths are measured in nucleotide substitutions per site (scale bar).
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International Brain Laboratory public data
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OpenNeuro
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