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8,443 results for “gastropoda”
FIGURE 14 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Eocene/Oligocene boundary interval of three cored boreholes in southern coastal Tanzania and their response to the global cooling event
FIGURE 14. Holotypes of Bovicornu eocenense Meyer, 1886 (1, 2) and B. gracile Meyer, 1887 (3, 4). Shell height of 1 = 2.8 mm, of 2 = 2.7 mm; 2 and 4 are magnifications of 1 and 3, respectively. Photographs after Hodgkinson et al. (1992, pl. 7, figures 9-12).
FIGURE 11 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Eocene/Oligocene boundary interval of three cored boreholes in southern coastal Tanzania and their response to the global cooling event
FIGURE 11. Limacina sp. 1. 1: RGM 777440c; apical view; 2: RGM 777440b; apertural view. Bar equals 100 μm.
FIGURE 7 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Eocene/Oligocene boundary interval of three cored boreholes in southern coastal Tanzania and their response to the global cooling event
FIGURE 7. Limacina tanzaniaensis sp. nov. 1: Holotype, apertural view, RGM 777428b, TDP 17.38.2, 22-29 cm; 2: paratype 1, apertural view, RGM 777438, TDP 17.36.2, 80-95 cm; 3: paratype 2, umbilical view, RGM 777416b, TDP 17.36.1, 10-25 cm; 4: paratype 3, apical view, RGM 777416c, same data as 3. Bar equals 100 μm.
FIGURE 15 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Eocene/Oligocene boundary interval of three cored boreholes in southern coastal Tanzania and their response to the global cooling event
FIGURE 15. Range chart of pteropods, combined data of TDP 11, 12 and 17, calibrated to composite depths. Basic stratigraphical data mainly from Pearson et al. (2008, figure 16).
FIGURE 3 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Eocene/Oligocene boundary interval of three cored boreholes in southern coastal Tanzania and their response to the global cooling event
FIGURE 3. Heliconoides nikkieae sp. nov.; 1: Holotype, RGM 777415a, apertural view; 2: apertural view, specimen lost; 3: paratype 1, RGM 777415b, umbilical view; 4: paratype 3, RGM 777 381, umbilical view; 5: paratype 2, RGM 777415c, apical view. Figure 3-1, -2, -3 and -5 from the type locality, TDP 17.36.1, 10-25 cm; Figure 3-4 from TDP 17.21.1, 9-20 cm. Bar equals 100 μm.
Fig 2 in A new species of Macrocypraea (Gastropoda, Cypraeidae) from Trindade Island, Brazil, including phenotypic differentiation from remaining congeneric species
Fig 2. Macrocypraea mammoth shells of types. (A-F) Holotype MZSP 137544 (L 133.1 mm). (A) Dorsal view. (B) Apertural view. (C) Right view. (D) Left view. (E) Anterior view. (F) Posterior view. (G-I) paratype MZSP 137545 (L 100.0 mm). (G) Dorsal view. (H) Apertural view. (I) right view. (J-N) Paratype MZSP 137546 (now broken) (L 112.3 mm). (J) Apertural view. (K) Dorsal view. (L) Left view. (M) Right view. (N) Same, right portion of shell removed.
Fig 6 in A new species of Macrocypraea (Gastropoda, Cypraeidae) from Trindade Island, Brazil, including phenotypic differentiation from remaining congeneric species
Fig 6. Macrocypraea mammoth anatomy. (A) Head, ventral view, foot and columellar muscle removed, radular sac uncoiled downwards. (B) Buccal mass, left view. (C) Visceral mass and posterior part of pallial cavity, ventral view, midgut seen as in situ, kidney opened longitudinally, only topology of gill shown. (D) Odontophore, dorsal view, both cartilages (oc) deflected, left m4 and m5 (right in figure) partially sectioned. Scales = 5 mm.
FIGURE 1 in A new species of Echinolittorina Habe, 1956 (Gastropoda: Littorinidae) from the Quaternary of Chile
FIGURE 1. Map of the study region showing the type locality of Echinolittorina nielseni sp. nov. in Caldera, northern Chile.
FIGURE 2 in A new species of Echinolittorina Habe, 1956 (Gastropoda: Littorinidae) from the Quaternary of Chile
FIGURE 2. Shells of Echinolittorina nielseni sp. nov. and of two extant littorinids: 1-8, Echinolittorina nielseni sp. nov., SGO.PI 23.100 (holotype) (1 and 2), NHMUK PAL PI TG 26769 (paratype) (3 and 4), NHMUK PAL PI TG 26770– 26773 (paratypes) (5-8); 9-13, Echinolittorina peruviana (Lamarck, 1822), NHMUK acc. no. 2176 (9 and 12), NHMUK 20001268 (10), NHMUK 20001269 (11), NHMUK unnumbered (13); and 14 and 15, Littoraria varia (Sowerby, 1832), NHMUK 1850.4.23.273 (14) and NHMUK 1850.4.23.274 (15). 13 is a scanning electron micrograph showing shell sculpture. 2, 8, 12, 13 are abapertural views and 4 is a basal view; others are apertural views. Collection localities: Chile (El Morro, Atacama) = 1-8, Chile (Valparaíso) = 9 and 12, Perú (Lagunilla Beach, Paracas) = 13, Panama = 14 and 15; others are unknown.
FIGURE 3. Gastropoda from Moncucco Torinese. 1-2 in Late Messinian mollusks and vertebrates from Moncucco Torinese, north-western Italy. Paleoecological and paleoclimatological implications
FIGURE 3. Gastropoda from Moncucco Torinese. 1-2. Cochlostoma esuanum: 1, lateral view of apex and protoconch (MGPT-PU 110978); 2: apertural view (MGPT-PU 110979). 3.?Limax fossilis: dorsal view (MGPT-PU 110928). 4. Parmacella sp.: dorsal view (MGPT-PU 110931). 5. Lucilla miocaenica: apical view of paratype (MGPT-PU 108849). 6. Truciella ballesioi: fragment with aperture in apertural view (MGPT-PU 108851). 7. Nordsieckia pontica: apertural view (MGPT-PU 108848). 8. Acicula giuntellii: apertural view of holotype (MGPT-PU 108896). 9. Theodoxus doderleini: dorsal view (MGPT-PU 110959). 10. Theodoxus mutinensis: dorsal view (MGPT-PU 110962). 11. Melanopsis narzolina: apertural view (MGPT-PU 110967). 12. Melanoides curvicosta: apertural view (MGPT-PU 110965). 13. Saccoia cf. congermana: apertural view (MGPT-PU 108873). 14. Saccoia globosa: apertural view of holotype (MGPT-PU 108858). Scale bars equal 0.5 mm (1-2, 5-7) and 1 mm (3-4, 8-14).
Fig. 6 A in A comprehensive phylogeographic study of Arion vulgaris Moquin-Tandon, 1855 (Gastropoda: Pulmonata: Arionidae) in Europe
Fig. 6 A COI-based Bayesian phylogenetic tree for Arion species con-" structed from currently available sequences with Arianta arbustorum sequence as an outgroup (see also Table 4, Supplementary Materials). Numbers at nodes indicate Bayesian posterior probability, values less than 0.90 are not shown on the tree. Clades for particular Arion species were collapsed regardless of the value of sequence divergence. The scale bar represents 0.05 substitutions per nucleotide position. Taxonomic names have been adopted from named GenBank sequences; accession numbers are given next to a particular clade
FIGURE 14 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 14. Stratigraphy and lithology for the Bass River core, after Stassen et al., 2015. The number of pteropods recognized (red) is compared to the B/Ca values (purple) in the planktonic foraminiferal genus Acarinina, a surfacewater (mixed layer) dweller (Babila et al., 2016), and with δ13C values of bulk carbonate (orange), indicating the location of the carbon isotope excursion (Stassen et al., 2015). The change in B/Ca is interpreted as reflecting a decline in pH by ~0.3-0.4 pH units (Babila et al., 2016). The irregularity of pteropod distribution is likely because they were transported to these sites, and do not represent an in situ population.
FIGURE 12 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 12. Limacina sp. 1. Computed tomography (CT) scan of the specimen pictured in Figure 11.1-3. Resolution 4.9 micrometer/voxel, 145 kV, detector exposure timing 750 ms. For animated version, see online at palaeo-electronica.org/content/2016/1662- pteropoda-from-the-usa-petm. By clicking on the image, the interactive 3D model is activated, and the reader can use the mouse to rotate the specimen and change magnification.
FIGURE 11 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 11. Limacina sp. 1. 1-3, Wilson Lake section, sample 37, depth 102.72-102.78 m, RGM 777 241; 1: apical view, 2: apertural view, 3: umbilical view. 4-5, Wilson Lake section, sample 50, depth 106.68-106.74 m, RGM 777259a; 4: apical view, 5: apertural view. 6, Wilson Lake section, sample 40, depth 103.02-103.08 m, RGM 777248; apical view.
FIGURE 9 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 9. Limacina novacaesarea Janssen and Sessa sp. nov. 1-3, Holotype, Wilson Lake section, sample 24, depth 98.76-98.82 m, RGM 777 219; 1: apical; view, 2: apertural view, 3: umbilical view. 4-6, Paratype 1, Wilson Lake section, sample 22. Depth 98.15-98.21 m, RGM 777 215a; 4: apical view, 5: apertural view, 6: oblique apical view to show lowering of initial whorl. 7, Paratype 2, Wilson Lake section, sample 27, depth 99.67-99.73 m, RGM 777 225; apertural view of poorly preserved, slightly depressed specimen.
FIGURE 10 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 10. Limacina novacaesarea Janssen and Sessa sp. nov. Computed tomography (CT) scan of the specimen pictured in Figure 9.1-3. Resolution 4.0 micrometer/voxel, 185 kV, detector exposure timing 750 ms. For animated version, see online at palaeo-electronica.org/content/2016/1662-pteropoda-from-the-usapetm. By clicking on the image, the interactive 3D model is activated, and the reader can use the mouse to rotate the specimen and change magnification.
FIGURE 13 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 13. Limacina sp. 2. 1-2, Cambridge-Dorchester section, sample 26, depth 222.61-222.62 m, RGM 777 345; 1: apical view, 2: apertural view.
FIGURE 7 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 7. Limacina aegis Hodgkinson in Hodgkinson, Garvie and Bé, 1992. 1, Clayton section, sample 19, depth 94.55-94.58 m, RGM 777319a; apertural view. 2, Clayton section, sample 21, depth 95.07-95.10 m, RGM 777 323; apertural view. 3-4, Wilson Lake section, sample 34, depth 101.80-101.86 m, RGM 777 236a; 3: apical view, 4: apertural view. 5-6, Wilson Lake section, sample 52, depth 07.08-107.11 m, RGM 777 264a; 5: apertural view, 6: umbilical view. 7-9, Wilson Lake section, sample 63, depth 108.20-108.26 m, RGM 777 283 (specimen lost); 7: apical view, 8: apertural view; 9: umbilical view. 10-11, Cambridge-Dorchester section, sample 15, depth 220.22-220.28 m, RGM 777 338; 10: apical view, 11: apertural view.
FIGURE 6 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 6. Heliconoides mercinensis (Watelet and Lefèvre, 1885). Computed tomography (CT) scan of the specimen pictured in Figure 5.1-3. Resolution 1.9 micrometer/voxel, 165 kV, detector exposure timing 750 ms. For animated version, see online at palaeo-electronica.org/content/2016/1662-pteropoda-from-the-usapetm. By clicking on the image, the interactive 3D model is activated, and the reader can use the mouse to rotate the specimen and change magnification.
FIGURE 3 in Pteropoda (Mollusca, Gastropoda, Thecosomata) from the Paleocene-Eocene Thermal Maximum (United States Atlantic Coastal Plain)
FIGURE 3. Altaspiratella elongatoidea (Aldrich, 1887). 1, Wilson Lake section, sample 31, depth 100.89-100.95 m, RGM 777 230; apertural view. 2, Clayton section, sample 9, depth 91.44-91.4 m; RGM 777 308a; apertural view. 3-4, Wilson Lake section, sample 42, depth 104.24-104.30 m; RGM 777 251a, 3: apertural view, 4: apical view.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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