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171 results for “shell morphology”
Fig. 1 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 1 Landmarks (LM) used in geometric morphometric analyses: apex (LM1); intersection of sutures with the shell outline (LMs 2–7); most external right (LM8) and left (LM9) points of the body whorl; highest (LM10), lowest (LM13), most external left (LM12) and right (LM11) point of the aperture; dotted auxiliary lines indicate how landmarks 14– 18 were placed
Fig. 4 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 4 Discriminant analysis of principal components of the 16 clusters detected by K-means clustering based on single nucleotide polymorphism data. Ellipses represent inertia ellipses
Fig. 3 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 3 Distribution of cytochrome b haplotypes for sexual (a) and asexual (b) individuals. Sizes of circles and segments are proportional to the number of individuals (up to 20 per site) per haplotype
Water body type Fig. 7 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Water body type Fig. 7 Variation in shell shape (a) and size (b) between water body types. notches extend to ± 1.58 times the IQR divided by the root squared The boxplots show the median (middle line), quartiles (boxes), 1.5 times number of observations, overlapping notches being strong evidence that the interquartile range (IQR) (whiskers), extreme values (dots). The the two medians do not differ (Chambers et al. 1983)
Fig. 6 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 6 Wireframe representations of the variation in shape (increased ten times) along PC1. The gray wireframes represent the mean shape observed across all sampled individuals; the black wireframes represent the most extreme shapes, with narrow morphs (a) for negative PC1 values and globular morphs (b) for positive PC1 values
Fig. 2 Median joining network for the seven cytochrome b in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 2 Median joining network for the seven cytochrome b haplotypes found in 979 New Zealand Potamopyrgus antipodarum and sampling sites. Each branch represents a single nucleotide substitution and short transversal lines as well as small black circles unsampled haplotypes. Size of circles is proportional to number of individuals per haplotype
FIGURES 16–25, Shells. Figs.16–18 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 16–25, Shells. Figs.16–18: Crepidula protea, MZSP 30780, dorsal, ventral and right views. Figs. 19–21: C. glauca, MZSP 30810, left, dorsal and ventral views. Fig. 22–25: C. carioca. Figs. 22–23: Holotype, ventral and dorsal views. Figs. 24–25, paratype 1, MNRJ 7464, dorsal and ventral views. Scale bars = 2 mm.
FIGURES 1–15, Shells. Figs.1–2 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 1–15, Shells. Figs.1–2: Crepidula plana, dorsal and ventral views, MZSP 36327. Fig.3:4: C. atrasolea, dorsal and ventral views, MZSP 36328. Figs.5–6: C. depressa, dorsal and ventral views, MZSP 36326. Figs.7–9: C. pyguaia, dorsal, ventral views and detail of the protoconch, MZSP 35831 (Holotype). Figs.10–12: C. margarita, MZSP 36329, dorsal, central and right views. Fig.13–15: C. intratesta, MZSP 30791 (Holotype), left, dorsal and ventral views. Scale bars = 2 mm.
Figure 1. Shells.A–J in Tracking parallel adaptation of shell morphology through geological times in the land snail genus Pupilla (Gastropoda: Stylommatophora: Pupillidae)
Figure 1. Shells.A–J, Pupilla alpicola (A–E, lowland populations"P.pratensis"; F–J, typical mountain populations).K–P, P.loessica. Q–T, P. muscorum. A, M_6001_3_1, Lake Galenbeck (Mecklenburg-Western Pomerania, Germany). B, SMNS-ZI0138340, type locality Dinkelscherben near Augsburg (Bavaria, Germany). C, M_846_1_2, Burgtonna (Thuringia, Germany), fossil from Early
Figure 6 in Tracking parallel adaptation of shell morphology through geological times in the land snail genus Pupilla (Gastropoda: Stylommatophora: Pupillidae)
Figure 6. Thin-plate splines illustrating (theoretical) transitions in shape, side view, exaggeration 5 times. A, fossil P. loessica → extant P. loessica. B, fossil P. pratensis (including P. m. densegyrata) → extant P. pratensis. C, fossil P. pratensis (including P. m. densegyrata) → extant P. alpicola. D, extant P. pratensis → P. alpicola. E, extant P. loessica→ P. alpicola. F, fossil P. muscorum → extant P. muscorum.
FIGURE 28. Shells, ventral view. A. Westracystis lissus, BMNH90.12.30.80–4 in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 28. Shells, ventral view. A. Westracystis lissus, BMNH90.12.30.80–4 (S). B. Westracystis lissus, AM C64901 (S of W. tentus). C. Echonitor cyrtochila, BMNH 1922.8.29.16 (H). D. Echonitor albumenoidea, AM C60533 (H). E. Periclocystis ardeni, AM C60541 (H). F. Tarocystis responsivus, AM C104308 (S). G. Conueplecta (Durgellina) calculosa, AM C374873. H. Coneuplecta (Nevelasta) pampini, AM C126763. Scale bars 2 mm (B, G–H), 3 mm (A, C–F). Photographs by H. Barlow (B, F–H), D. Beechey (D–E), W. Ponder (A, C). Abbreviations: H, holotype; S, syntype.
FIGURE 21. Shells, ventral view. A in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 21. Shells, ventral view. A. Stanisicarion freycineti, AM C391188. B. Stanisicarion virens, BMNH 197776 (S). C. Eungarion mcdonaldi, QMMO35628 (H). D. Parmacochlea fischeri, AM C432179. E. Nitor circumcincta, AM C104161 (H). F. Nitor subrugata, AM C333711. G. Nitor subrugata, AM C63479 (S of N. subrugata helmsianus). H. Pravonitor kreffti, BMNH no number (POS). I. Pravonitor kreffti, AM C29647 (H of P. kreffti insularum). J. Expocystis rustica, BMNH1982243 (POH of Helix villaris). K. Malandena suturalis, AM C425087. Scale bars 3 mm (A, E, J), 5 mm (B–D, F–I, K). Photographs by H. Barlow (A, D, F, I), D. Beechey (E, G), I. Hyman (K), W. Ponder (B, H, J), copyright Australian Museum; photographer unknown, copyright Queensland Museum (C). Abbreviations: H, holotype; POH, possible holotype; POS, possible syntype; S, syntype.
FIGURE 27. Shells, lateral view. A. Westracystis lissus, BMNH 90.12.30.80–4 in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 27. Shells, lateral view. A. Westracystis lissus, BMNH 90.12.30.80–4 (S). B. Westracystis lissus, AM C64901 (S of W. tentus). C. Echonitor cyrtochila, BMNH 1922.8.29.16 (H). D. Echonitor albumenoidea, AM C60533 (H). E. Periclocystis ardeni, AM C60541 (H). F. Tarocystis responsivus, AM C104308 (S). G. Conueplecta (Durgellina) calculosa, AM C374873. H. Coneuplecta (Nevelasta) pampini, AM C126763. Scale bars 2 mm (B, G–H), 3 mm (A, C–F). Photographs by H. Barlow (B, F–H), D. Beechey (D–E), W. Ponder (A, C). Abbreviations: H, holotype; S, syntype.
FIGURE 9. Shells, ventral view. A in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 9. Shells, ventral view. A. Helicarion cuvieri, AM C443929. B. Helicarion cuvieri, BMNH 197780 (S of Vitrina verrauxii). C. Helicarion mastersi, AM C101139 (H). D. Helicarion mastersi, AM C101138 (PRH of H. mastersi callidus). E. Mysticarion insuetus, AM C113776 (S). F. Mysticarion porrectus, AM C101136 (PRH). G. Mysticarion hyalina, BMNH 1983075 (H). H. Parmavitrina planilabris, AM C103630. I. Peloparion helenae, AM C101142 (H). J. Brevisentis jacksoniensis, BMNH not registered (S). K. Brevisentis jacksoniensis, AM C101143 (H of B. exclusus). L. Fastosarion superba, BMNH not registered (POS). Scale bars 3 mm (D–G, I–K), 5 mm (A–C, H), 10 mm (L). Photographs by H. Barlow (A, C–D, H–I), D. Beechey (F, K), W. Ponder (B, E, G, J, L). Abbreviations: H, holotype; POS, possible syntype; PRH, probable holotype; S, syntype.
FIGURE 7. Shells, dorsal view. A in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 7. Shells, dorsal view. A. Helicarion cuvieri, AM C443929. B. Helicarion cuvieri, BMNH 197780 (S of Vitrina verrauxii). C. Helicarion mastersi, AM C101139 (H). D. Helicarion mastersi, AM C101138 (PRH of H. mastersi callidus). E. Mysticarion insuetus, AM C113776 (S). F. Mysticarion porrectus, AM C101136 (PRH). G. Mysticarion hyalina, BMNH 1983075 (H). H. Parmavitrina planilabris, AM C103630. I. Peloparion helenae, AM C101142 (H). J. Brevisentis jacksoniensis, BMNH not registered (S). K. Brevisentis jacksoniensis, AM C101143 (H of B. exclusus). L. Fastosarion superba, BMNH not registered (POS). Scale bars 3 mm (G, I–K), 5 mm (A–F, H), 10 mm (L). Photographs by M. Allan (D, I), H. Barlow (A, C, H), D. Beechey (E–F, K), W. Ponder (B, G, J, L). Abbreviations: H, holotype; POS, possible syntype; PRH, probable holotype; S, syntype.
FIGURE 26. Shells, dorsal view. A. Westracystis lissus, BMNH 90.12.30.80–4 in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 26. Shells, dorsal view. A. Westracystis lissus, BMNH 90.12.30.80–4 (S). B. Westracystis lissus, AM C64901 (S of W. tentus). C. Echonitor cyrtochila, BMNH 1922.8.29.16 (H). D. Echonitor albumenoidea, AM C60533 (H). E. Periclocystis ardeni, AM C60541 (H). F. Tarocystis responsivus, AM C104308 (S). G. Conueplecta (Durgellina) calculosa, AM C374873. H. Coneuplecta (Nevelasta) pampini, AM C126763. Scale bars 2 mm (B, G–H), 3 mm (A, C–F). Photographs by M. Allan (F), H. Barlow (B, G–H), D. Beechey (D–E), W. Ponder (A, C). Abbreviations: H, holotype; S, syntype.
FIGURE 8. Shells, lateral view. A in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 8. Shells, lateral view. A. Helicarion cuvieri, AM C443929. B. Helicarion cuvieri, BMNH 197780 (S of Vitrina verrauxii). C. Helicarion mastersi, AM C101139 (H). D. Helicarion mastersi, AM C101138 (PRH of H. mastersi callidus). E. Mysticarion insuetus, AM C113776 (S). F. Mysticarion porrectus, AM C101136 (PRH). G. Mysticarion hyalina, BMNH 1983075 (H). H. Parmavitrina planilabris, AM C103630. I. Peloparion helenae, AM C101142 (H). J. Brevisentis jacksoniensis, BMNH not registered (S). K. Brevisentis jacksoniensis, AM C101143 (H of B. exclusus). L. Fastosarion superba, BMNH not registered (POS). Scale bars 3 mm (E–G, I–K), 5 mm (A–D, H), 10 mm (L). Photographs by H. Barlow (A, C–D, G–H, L), D. Beechey (E, J), W. Ponder (B, F, I, K). Abbreviations: H, holotype; POS, possible syntype; PRH, probable holotype; S, syntype.
FIGURE 20. Shells, lateral view. A in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 20. Shells, lateral view. A. Stanisicarion freycineti, AM C391188. B. Stanisicarion virens, BMNH 197776 (S). C. Parmacochlea fischeri, AM C432179. D. Nitor circumcincta, AM C104161 (H). E. Nitor subrugata, AM C333711. F. Nitor subrugata, AM C63479 (S of N. subrugata helmsianus). G. Pravonitor kreffti, BMNH no number (POS). H. Pravonitor kreffti, AM C29647 (H of P. kreffti insularum). I. Expocystis rustica, BMNH 1982243 (POH of Helix villaris). J. Malandena suturalis, AM C425087. Scale bars 3 mm (A, D, I), 5 mm (B–C, E–H, J). Photographs by H. Barlow (A, C, E, H), D. Beechey (D, F), W. Ponder (B, G, I), I. Hyman (J). Abbreviations: H, holotype; POH, possible holotype; POS, possible syntype; S, syntype.
FIGURE 19. Shells, dorsal view. A in A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462
FIGURE 19. Shells, dorsal view. A. Stanisicarion freycineti, AM C391188. B. Stanisicarion virens, BMNH 197776 (S). C. Eungarion mcdonaldi, QMMO35628. D. Parmacochlea fischeri, AM C432179. E. Nitor circumcincta, AM C104161 (POS of Helix marmorata). F. Nitor subrugata, AM C333711. G. Nitor subrugata, AM C63479 (S of N. subrugata helmsianus). H. Pravonitor kreffti, BMNH no number (POS). I. Pravonitor kreffti, AM C29647 (H of P. kreffti insularum). J. Expocystis rustica, BMNH 1982243 (POH of Helix villaris). K. Malandena suturalis, AM C425087. Scale bars 3 mm (E, J), 5 mm (A–D, F–I, K). Photographs by H. Barlow (A, D, F, I), D. Beechey (E, G), I. Hyman (K), W. Ponder (B, H, J), copyright Australian Museum; photographer unknown, copyright Queensland Museum (C). Abbreviations: H, holotype; POH, possible holotype; POS, possible syntype; S, syntype.
Figure 16 in Phylogeny of the deep-sea cirripede family Scalpellidae (Crustacea, Thoracica) based on shell capitular plate morphology
Figure 16. Eocene Scalpellinae, to illustrate the evolutionary origin of the genus Scalpellum. Scuta, terga, and carinae. A–F, Scalpellum fischeri Bertrand, 1891, Lutetian, Calcaire Grossier, Chaussy, near Mantes (Seine-et-Oise), Paris Basin, France. A, B, scutum, external and internal views (original of Withers, 1953, pl. 38, figs 3, 4), NHMUK In. 39466. C, tergum, external view (original of Withers, 1953, pl. 38, figs 5, 6), NHMUK In. 39468. D–F, carina (original of Withers, 1953, pl. 38, fig. 1), NHMUK In. 39465. L, Arcoscalpellum venablesi Withers, 1953, lower Ypresian, Division B1 of London Clay ('Fish Tooth Bed'), Bognor Regis, Sussex, UK. G, H, scutum, in external and internal views (original of Withers, 1953, pl. 63, fig. 1), NHMUK In. 39072. I, tergum (original of Withers, 1953, pl. 63, fig. 4), NHMUK In. 39072. J–L, carina (original of Withers, 1953, pl. 63, fig. 1), NHMUK In. 39033. M–R, Arcoscalpellum quadratum (Dixon, 1850), lower Ypresian, Division A3 of London Clay ('Bognor Rock'), Bognor Regis, Sussex, UK. M, N, scutum. O, tergum. P–R, carina. NHMUK In. 32543–32550. Note the progressive elongation of the apical part of the scutum, the change in shape of the tergum, and the subapical migration of the carinal umbo. Compare with extant Scalpellum in Figure 15. Scale bars: 5 mm.
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OpenNeuro
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