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1,225 results for “land snail”
HELIX: Data-driven characterization of Brazilian land snails
<p>The Subulinidae family of Brazilian land snails includes similar species with particular morphometrical characteristics. We surveyed the metro area of the Juiz de Fora/MG city and collected snails from a representative private property with centered at 21º42'31''S, 43º21'26'', alt. 795m, with red-yellow oxisol, 8.5 pH, and Cwa climate. We performed monthly collections in a ecosystem with <em>Pennisetum purpureum</em>, <em>Brachiaria mutica</em>, <em>Paspalum notatum</em>, <em>Bidens pilosa</em>, <em>Leucena leucocephala</em>, and <em>Ricinus communis</em> plants near a river flow in the 2008/Sep - 2009/Aug timespan. There, we defined an equally spaced transect of 200m with ten collection points and gathered 50 x 50 cm, 500 g litter-falls. Samples were sieved by 2.0 mm meshs, and living specimens were cleaned and fixed in a Railliet-Henry liquid, their shells removed, dried, and separated. Finally, we label the species and create the Helix dataset. We measured each shell <em>Height</em>, <em>Diameter</em>, <em>Spire height</em>, and <em>Aperture width</em> and <em>height</em> with a pachymeter. The dataset includes 518 instances labeled as <em><strong>Beckianum beckianum</strong></em> (28.8%), <em><strong>Dysopeas muibum</strong></em> (21.2%), <em><strong>Allopeas gracilis</strong></em> (9.7%), <em><strong>Leptinaria unilamellata </strong></em>(12%), and <em><strong>Subulina octona</strong></em> (28.3%). </p>
Original .tif files for "Land snails can trap trematode cercariae in their shell: encapsulation as a general response against parasites?"
<p>In our article "Land snails can trap trematode cercariae in their shell: encapsulation as a general response against parasites?", we use photographic evidence to demonstrate the ability of snails to trap trematodes in their shells. Here we archive the tif files that make up our Figure 1 for this paper, for browsing at higher resolutions than on the published article.</p> <p>Below a (slightly edited) copy of the figure legend:</p> <p>"Backlit views of metazoan parasites trapped in the shell of Cornu aspersum: trematode cercariae (Fig1A.tif, Fig1B.tif, Fig1C.tif), and nematode (Fig1D.tif). Small cracks of the inner shell layer (Fig1B.tif) can be seen above the cercariae and were considered as indicative of damage on the shell after it covered cercariae. Note the accumulation of dark adhering cells around or above the parasites in both cases of cercariae (Fig1C.tif) and nematode (Fig1D.tif)."</p>
Fig. 4 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 4. Ptilototheca soutpansbergensis gen. et sp. nov. A–D. Holotype, diameter 9.2 mm (NMSA V5567/ T4069). E. Protoconch showing sculpture of punctate spiral lines, Entabeni Forest (paratype, NMSA P0186/T4063). F. SEM of protoconch microsculpture, Thathe Vondo Forest (paratype, NMSA W2080/ T4064). Scale bars: E = 0.5 mm; F = 250 µm.
Fig. 13 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 13. Sheldonia wolkbergensis sp. nov., holotype, diameter 7.7 mm, height 5.2 mm (NMSA P0156/ T4074).
Fig. 1 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 1. Gulella davisae sp. nov. A–D. Holotype, height 6.1 mm, diameter 2.9 mm (NMSA P0418/ T4086). E. Juvenile specimen showing apertural dentition, diameter 2.7 mm (paratype, NMSA P0235/ T4091).
Fig. 3 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 3. Gulella hadroglossa sp. nov. A–E. Holotype, height 3.0 mm, diameter 1.5 mm (NMSA P0230/ T4084). F–G. Juvenile specimen showing apertural dentition, diameter 1.5 mm (paratype, NMSA P0417/T4085).
Fig. 10 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 10. Sheldonia monsmaripi sp. nov., living animals. A–B. Mariepskop Forest Reserve, mist-belt forest, shell diameter 11.6 mm (paratype, NMSA P0276/T4073). C–D. Mariepskop Forest Reserve, summit fynbos, shell diameter 16.3 mm (NMSA P0278).
Fig. 7 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 7. Ptilototheca soutpansbergensis gen. et sp. nov., genitalia. A. Entire genital system. B. Basal portion of penis opened to show penial verge and coarsely papillate preputial region. C. Flagellum and epiphallus. D. Spermatophore. A–C. Paratype, NMSA P0304/T4060. D. Paratype, NMSA W2259/T4067.
Fig. 6 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 6. Ptilototheca soutpansbergensis gen. et sp. nov., radula, holotype (NMSA V5567/T4069). A. Rachidian and left lateral teeth. B. Rachidian and innermost lateral teeth. C. Inner left marginal teeth. D. Outer left marginal teeth. Scale bars: A, C = 50 µm; B, D = 25 µm.
Fig. 15 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 15. Sheldonia wolkbergensis sp. nov., radula, holotype (NMSA P0156/T4074). A. Rachidian and lateral teeth. B. Rachidian and innermost lateral teeth. C. Inner marginal teeth. D. Outer marginal teeth. Scale bars: A–C = 50 µm; D = 25 µm.
Fig. 7 in Land snail genus Sarika Godwin-Austen, 1907 (Eupulmonata: Ariophantidae) from Cambodia, with description of three new species
Fig. 7. Sarika nana Pholyotha & Panha sp. nov., paratype (CUMZ 7908). A. Living snail. B. General view of genital system. C. Internal structure of penis. D. Representative SEM image of the radula. Central tooth indicated by 'C'; yellow arrow heads indicate lateral teeth with the transition to marginal teeth; white arrow heads indicate the end of penis.
Fig. 5 in Land snail genus Sarika Godwin-Austen, 1907 (Eupulmonata: Ariophantidae) from Cambodia, with description of three new species
Fig. 5. Sarika khmeriana Pholyotha & Panha sp. nov., paratype (CUMZ 7905). A. Living snail. B. Beneral view of genital system. C. Internal structure of penis. D. Representative SEM image of the radula. Central tooth indicated by 'C'; yellow arrow heads indicate lateral teeth with the transition to marginal teeth; white arrow heads indicate the end of penis.
Fig. 4 in Land snail genus Sarika Godwin-Austen, 1907 (Eupulmonata: Ariophantidae) from Cambodia, with description of three new species
Fig. 4. Shells of Sarika spp. A. Sarika khmeriana Pholyotha & Panha sp. nov., holotype (CUMZ 7904). B. Sarika khmeriana Pholyotha & Panha sp. nov., paratype (CUMZ 7905). C. S. nana Pholyotha & Panha sp. nov., holotype (CUMZ 7907). D. S. nana Pholyotha & Panha sp. nov., paratype (CUMZ 7908). E. Macrochlamys excepta (Mabille, 1887), syntype (MNHN-IM-2000-27886). F. M. zero (Mabille, 1887), syntype (MNHN-IM-2000-27782).
Figure 3 in Investigating the influence of habitat type and weather conditions on the population dynamics of land snails Vertigo angustior Jeffreys, 1830 and Vertigo moulinsiana (Dupuy, 1849). A case study from western Poland
Figure 3. Diagram of one-way analysis of covariance test comparing a logarithmized number of individuals of Vertigo angustior (F = 92.16; p <0.01) and Vertigo moulinsiana (F = 8.165; p <0.01) in the Ilanka and Pliszka sites in 2009. Middle line: mean; box range: standard error; whiskers: standard deviation.
Figure 2 in Investigating the influence of habitat type and weather conditions on the population dynamics of land snails Vertigo angustior Jeffreys, 1830 and Vertigo moulinsiana (Dupuy, 1849). A case study from western Poland
Figure 2. Precipitation in the studied sites in consecutive months of 2009; dashed bars – sampling months. (B) and (C) Abundance of individuals: juveniles (white bars) and adults (black bars) of Vertigo angustior (B) and Vertigo moulinsiana (C) in each sampling event in the Ilanka and Pliszka sites in 2009.
FIG. 6. — A in Shifting shell morphology in a Late Miocene-Pliocene land snail species lineage (Gastropoda: Stylommatophora: Spiraxidae), with the description of a new species
FIG. 6. — A, Palaeoglandina aquensis (Matheron, 1843) from Aix (Burdigalian, Aix Basin), MHNM 6034.9314.1; B, P. galloprovincialis (Matheron, 1843) from Peyrolles (Tortonian, Durance Basin), MHNM 6034.9317.1; C1, C2, P. montenati Truc, 1971 from Quibas (Calabrian, Quibas site), MVHN-180222GM05; D1, D2, P. aquensis var. obtusa (Depéret, 1890), UCBL-FSL 148027; E1, E2, P. gracilis (Zieten, 1832), NHMW 2013/0572/0040; F1, F2, P. taurinensis (Sacco, 1886), BS.093.02.001; G, P. turolensis n. sp., MAP-8420, detail of protoconch; H, P. gracilis (Zieten, 1832), NHMW 2013/0572/0040, detail of protoconch; I, P. taurinensis (Sacco, 1886), BS.093.02.001, detail of protoconch;J, P. montenati Truc,1971 from Quibas,MVHN-180222GM05,detail of protoconch. Scale bars: A-F,10 mm; G,1 mm; H-J, 2 mm.
FIG. 2. — A in Shifting shell morphology in a Late Miocene-Pliocene land snail species lineage (Gastropoda: Stylommatophora: Spiraxidae), with the description of a new species
FIG. 2. — A, Shell measurements, following Solem & Climo (1985), and arrangement of landmarks (large circles) and semi-landmarks (small dots). The numbers in parentheses indicate the number of points for each of the two semi-landmark curves. See text for abbreviations. B, Protoconch measurements, following Verduin (1977). Abbreviations: N, nucleus; P/T boundary, protoconch/teleoconch boundary. Scale bar: A, 5 mm; B, 6 mm.
FIG. 4. — A, Palaeoglandina turolensis n in Shifting shell morphology in a Late Miocene-Pliocene land snail species lineage (Gastropoda: Stylommatophora: Spiraxidae), with the description of a new species
FIG. 4. — A, Palaeoglandina turolensis n. sp. from La Gloria 4 (Ruscinian, Teruel Basin): A1-A3, MAP-8405, holotype; B, MAP-8406, paratype; C, MAP-8407, paratype; D, MAP-8408, paratype; E, MAP-8409, paratype; F, MAP-8410, paratype; G, MAP-8411, paratype; H, MAP-8412, paratype; I, MAP-8413, paratype; J, MAP-8414, paratype; K, MAP-8415; L, MAP-8416; M, MAP-8417; N, MAP-8418; O, MAP-8419. Scale bar: 10 mm.
FIG. 3 in Shifting shell morphology in a Late Miocene-Pliocene land snail species lineage (Gastropoda: Stylommatophora: Spiraxidae), with the description of a new species
FIG. 3. — Results of the morphometric analyses: A, principal components analysis of the Procrustes shape coordinates; shown are the first three axes explaining 88.5% of the total variance; B, thin-plate spline deformation grid illustrating the extreme values for each principal component; deformations were magnified to a factor of 2 to highlight variation of distinct traits; C, reconstructed mean shapes for all material as well as across specimens for each locality.
FIG. 5. — A-D, O, Palaeoglandina turolensis n in Shifting shell morphology in a Late Miocene-Pliocene land snail species lineage (Gastropoda: Stylommatophora: Spiraxidae), with the description of a new species
FIG. 5. — A-D, O, Palaeoglandina turolensis n. sp. from Orrios 1 (Ruscinian, Teruel Basin): A, O, MAP-8421; B, MAP-8422; C, MAP-8423; D, MAP-8424; E-L, N, P. turolensis n. sp. from Los Aljezares (Turolian, Teruel Basin): E, 040822JA01; F, N, 040822JA02; G, MGM-3723; H, MNCNI-28900-D; I, MNCNI-28900-A; J, MGM-118M; K, MNCNI-28900-E; L, MNCNI-11300-E; M, P. turolensis n. sp. from La Gloria 4, MAP-8405. Scale bars: A-J, 10 mm; M-O, 6 mm.
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