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1,663 results for “shells”
Figure 4 from: Baur H, Reichenbach F, Neubert E (2012) Sexual dimorphism in shells of Cochlostoma septemspirale (Caenogastropoda, Cyclophoroidea, Diplommatinidae, Cochlostomatinae). ZooKeys 208: 1-16. https://doi.org/10.3897/zookeys.208.2869
Figure 4 - Boxplots of the ratios shell height:aperture height (a) and shell width:aperture width (b), and aperture protrusion (c). Significance levels of Wilcoxon test: '***' p < 0.001, '**' p < 0.01, '*' p < 0.05, '.' p < 0.1, ' ' p < 1.
Figure 3 from: Miranda N, van Rooyen R, Macdonald A, Ponder W, Perissinotto R (2014) Genetics and shell morphometrics of assimineids (Mollusca, Caenogastropoda, Truncatelloidea) in the St Lucia Estuary, South Africa. ZooKeys 419: 73-86. https://doi.org/10.3897/zookeys.419.7556
Figure 3 - Bayesian Inference tree for 28S data. Support values are as follows: Bayesian Inference/ML/MP/NJ.
Figure 1 from: Miranda N, van Rooyen R, Macdonald A, Ponder W, Perissinotto R (2014) Genetics and shell morphometrics of assimineids (Mollusca, Caenogastropoda, Truncatelloidea) in the St Lucia Estuary, South Africa. ZooKeys 419: 73-86. https://doi.org/10.3897/zookeys.419.7556
Figure 1 - Map of St Lucia Estuary. Sample localities are indicated by arrows and dots (Modified from Miranda et al. 2010).
Figure 2 from: Miranda N, van Rooyen R, Macdonald A, Ponder W, Perissinotto R (2014) Genetics and shell morphometrics of assimineids (Mollusca, Caenogastropoda, Truncatelloidea) in the St Lucia Estuary, South Africa. ZooKeys 419: 73-86. https://doi.org/10.3897/zookeys.419.7556
Figure 2 - Bayesian Inference tree for COI data. Support values are as follows: Bayesian Inference/NJ/ML/MP.
Figure 4 from: Miranda N, van Rooyen R, Macdonald A, Ponder W, Perissinotto R (2014) Genetics and shell morphometrics of assimineids (Mollusca, Caenogastropoda, Truncatelloidea) in the St Lucia Estuary, South Africa. ZooKeys 419: 73-86. https://doi.org/10.3897/zookeys.419.7556
Figure 4 - Plot of first two principal components of PCA for morphometric data. The cluster analysis ellipses are associated with P = 0.001.
Figure 9 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 9 - Other Pleurolucina species. A, B Pleurolucina hendersoni Britton, 1972, exterior and interior of left valve Guadeloupe station GD 69 (MNHN), L 9.1 mm C, D Pleurolucina sombrerensis (Dall, 1886) exterior of left valve (L 4.9 mm) and interior of right valve (L 5.2 mm), USNM 446178, Eolis stn 48, off Miami, Florida, 110 m E–G Pleurolucina undata (Carpenter, 1865) exterior of left valve and interiors of right and left valves, NUMUK 1915.15.273 'California', L 11.0 mm H–J Pleurolucina leucocymoides (Lowe, 1935), exterior of right valve and interiors of right and left valves SBMNH 141511, Baja California, NE of Isla Danzante, Mexico, L 11 mm K–M Pleurolucina taylori Coan & Valentich-Scott, 2012, holotype, exterior of left valve and interior of left and right valves, SBMNH 149647, Baja California, Los Frailes, Mexico, L 9.5 mm.
Figure 8 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 8 - Bivariate height/length plots comparing Pleurolucina harperae with Pleurolucina leucocyma, and Pleurolucina undata. Length and height in millimetres.
Figure 7 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 7 - Pleurolucina leucocyma. A–C Lucina leucocyma Dall, 1881 lectotype MCZ 7986, exterior, interior and dorsal view of right valve, L 5.7 mm, H 6.6 mm D, E Lucina leucocyma paralectotype USNM 83140, exterior of left valve and interior of right valve, L 4.8 mm, H 5.5 mm F–K, Pleurolucina leucocyma USNM 446563 Eolis Station 368, off Ajax Reef, Florida F Exterior of left valve, L 5.1 mm G Left valve of juvenile shell, L 3.1 mm H Lateral view of left valve, L 5.1 mm. I Interior of left valve, L 5.5 mm J Interior of right valve, L 5.5 mm K Protoconch, scale bar = 100 µm.
Figure 6 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 6 - Shell microstructure of other species Pleurolucina hendersoni, Pleurolucina undata, Lucina pensylvanica and Cardiolucina quadrata. A Pleurolucina hendersoni Guadeloupe, fractured section with prominent calcified conchiolin layer, periostracum at base. Scale bar = 20 µm B Pleurolucina hendersoni, detail of conchiolin layer with lines of calcareous spherulites. Scale bar = 20 µm C Pleurolucina undata Baja California, fractured section with thin conchiolin layer Scale bar = 200 µm D Pleurolucina undata, detail of conchiolin layer with spherulites. Scale bar = 20 µm E Pleurolucina undata, single spherulites embedded in conchiolin. Scale bar = 3 µm F Lucina pensylvanica Florida Keys, calcified conchiolin layer. Scale bar = 20 µm G Lucina pensylvanica, single spherulite. Scale bar = 2 µm H Lucina pensylvanica, section of periostracum with calcareous granules. Shell interior to top. Scale bar = 20 µm I Cardiolucina quadrata Philippines, fractured section with conchiolin layer. Scale bar = 200 µm J Cardiolucina quadrata detail of conchiolin layer with calcareous aggregates. Scale bar = 50 µm K Cardiolucina quadrata detail of calcareous aggregate. Scale bar = 10 µm.
Figure 5 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 5 - Failed and multiple drill holes in shells of Pleurolucina harperae. A L = 6.8 mm B L = 9.8 mm C L =7.8 mm D SEM of failed drill hole terminating at conchiolin layer. Scale bar = 1.0 mm.
Figure 4 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 4 - Shell microstructure of Pleurolucina harperae. A Fractured section of shell margin showing major notch growth halt and conchiolin layer. Scale bar = 400 µm B Fractured section showing succession of shell layers. Shell exterior at top. Scale bar = 100 µm C Conchiolin layer with regular bands of spherulites. Scale bar = 40 µm D Individual spherulite. Scale bar = 2 µm E Adjacent spherulites embedded in conchiolin with narrow channels between layers. Scale bar = 5 µm F Single spherulites with channels below and above. Scale bar = 5 µm. cl crossed lamellar layer co conchiolin layer cp composite prismatic layer ip irregular prismatic layer p periostracum sp spherulitic prismatic layer.
Figure 3 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 3 - Pleurolucina harperae, general anatomy, ctenidia, bacteria, oocytes and sperm. A Right side, with mantle removed, right demibranch and extended foot stained with methylene blue L 7 mm B Left demibranch and foot, critical point dried preparation. Scale bar = 1 mm C Cut section to show general anatomy, stained with methylene blue L 8 mm D Transverse section through single ctenidial demibranch. Scale bar = 100 µm E Surface of bacteriocytes and intercalary cells on lateral view of a ctenidial filament. Scale bar = 15 µm F Spirochaete bacteria on surface of bacteriocytes. Scale bar = 2 µm G, H Symbiotic bacteria contained in bacteriocyte. Scale bar = 5 µm I Developing oocytes. Scale bar = 500 µm J, K Sperm. Scale bars = 5, 2 µm respectively. aa anterior adductor muscle bz bacteriocyte zone cz ciliated zone dg digestive gland f foot lp labial palps me mantle edge ov ovary with oocyctes pa posterior adductor r rectum rd right demibranch st stomach tm thickened mantle ventral to anterior adductor muscle.
Figure 2 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 2 - Outline drawings of shell interiors of A Pleurolucina harperae and B Pleurolucina leucocyma.
Figure 1 from: Glover EA, Taylor JD (2016) Pleurolucina from the western Atlantic and eastern Pacific Oceans: a new intertidal species from Curaçao with unusual shell microstructure (Mollusca, Bivalvia, Lucinidae). ZooKeys 620: 1-19. https://doi.org/10.3897/zookeys.620.9569
Figure 1 - Pleurolucina harperae sp. n. A–C Holotype NHMUK 20160338 exterior of right and interior of right and left valves L 8.8 mm. D–P Paratypes. NHMUK 20160339 dorsal view L 7.6 mm. E Exterior of left valve L 7.7 mm. F Interior of right valve L 6.3 mm. G Exterior of right valve L 7.9 mm. H Hinge area of right valve L 8.6 mm. I Exterior of left valve L 63 mm. J, K Interiors of right and left valves L 5.0 mm. L Dorsal view showing lunule. Scale bar = 0.5 mm. M, N Details of hinge teeth of J, K. O Protoconch. Scale bar = 100 µm. P Detail of microsculpture. Scale bar = 20 µm.
Figure 4 from: Wall-Palmer D, Burridge AK, Peijnenburg KTCA (2016) Atlanta ariejansseni, a new species of shelled heteropod from the Southern Subtropical Convergence Zone (Gastropoda, Pterotracheoidea). ZooKeys 604: 13-30. https://doi.org/10.3897/zookeys.604.8976
Figure 4 - SEM images of Atlanta ariejansseni. Aari_AMT20_33_01 (a, c–d); Aari_AMT20_33_02 (b, e–f); Aari_47S_01 (g); Aari_47S_02 (h); Aari_AMT20_74_01 (i); Aari_AMT20_74_05 (j); Aari_AMT20_74_02 (k). Specimens g and h were imaged using low vacuum SEM and were not sputter coated.
Figure 1 from: Wall-Palmer D, Burridge AK, Peijnenburg KTCA (2016) Atlanta ariejansseni, a new species of shelled heteropod from the Southern Subtropical Convergence Zone (Gastropoda, Pterotracheoidea). ZooKeys 604: 13-30. https://doi.org/10.3897/zookeys.604.8976
Figure 1 - The biogeography of Atlanta ariejansseni based on known specimens. Dashed lines show the latitudinal limits of distribution at 37°S and 48°S.
Figure 2 from: Wall-Palmer D, Burridge AK, Peijnenburg KTCA (2016) Atlanta ariejansseni, a new species of shelled heteropod from the Southern Subtropical Convergence Zone (Gastropoda, Pterotracheoidea). ZooKeys 604: 13-30. https://doi.org/10.3897/zookeys.604.8976
Figure 2 - Maximum-likelihood tree showing the relationship of Atlanta ariejansseni to different species of Atlanta, different Atlantidae genera, and different Pterotracheoidea families, based on Cytochrome Oxidase I DNA sequences. Branch lengths are proportional to the amount of inferred change, indicated by the scale bar. Only bootstrap support (1000 replicates) above 70% are displayed. GenBank sequence numbers are presented in Table 2. Sequences from Jennings et al. 2010 begin with FJ.
Figure 5 from: Wall-Palmer D, Burridge AK, Peijnenburg KTCA (2016) Atlanta ariejansseni, a new species of shelled heteropod from the Southern Subtropical Convergence Zone (Gastropoda, Pterotracheoidea). ZooKeys 604: 13-30. https://doi.org/10.3897/zookeys.604.8976
Figure 5 - Stacking light microscopy images of Atlanta ariejansseni showing variations in tissue colour. Aari_AMT24_29_01 (a, g); Aari _AMT24_27_01 (b, h); Aari_AMT24_26_01 (c); Aari_AMT24_26_02 (d); Aari_AMT24_27_04 (e); Aari_AMT24_27_04 (f); Aari_AMT24_28_01 (i); Aari_AMT24_28_01 (j–l); Radula of Aari_AMT20_33_03 (m–n).
Figure 3 from: Wall-Palmer D, Burridge AK, Peijnenburg KTCA (2016) Atlanta ariejansseni, a new species of shelled heteropod from the Southern Subtropical Convergence Zone (Gastropoda, Pterotracheoidea). ZooKeys 604: 13-30. https://doi.org/10.3897/zookeys.604.8976
Figure 3 - Abundance and pie charts of relative abundance (%) of atlantids at southern Atlantic stations of the AMT24 cruise.
Figure 5 in Homoplasy in shells discombobulated the taxonomy: revision of the larger helicarionid land snails of northern Queensland, Australia (Stylommatophora: Helicarionidae)
Figure 5. Map of the Torres Strait Islands.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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