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8,443 results for “gastropoda”
FIGURE 7. A, B in New taxonomic and phylogeographic data on three nominal species of the genus Septaria Férussac, 1807 (Gastropoda: Cycloneritida: Neritidae)
FIGURE 7. A, B. Two other different external patterns of the shell, found in Septaria porcellana. A. MNHN-IM-2013-62872 (Okinawa, Japan) B. MNHN-IM-2013-62867 (Okinawa, Japan). C–H. Samples of S. borbonica from different islands in the Indian Ocean have a common external pattern. C. MNHN-IM-2016-7863 (Reunion Island) D. MNHN-IM-2016-7857 (Mauritius) E. MNHN-IM-2016-7874 (Seychelles) F. MNHN-IM-2016-7880 (Mayotte, Comoros) G. MNHN-IM-2016-7887 (Anjouan, Comoros) H. MNHN-IM-2016-7892 (Grande-Comore, Comoros). Dorsal view without periostracum, below. Scale bars: 10 mm.
Data from: Glowing seashells: diversity of fossilized coloration patterns on coral reef-associated cone snail (Gastropoda: Conidae) shells from the Neogene of the Dominican Republic
The biology of modern Conidae (cone snails)—which includes the hyperdiverse genus Conus—has been intensively studied, but the fossil record of the clade remains poorly understood, particularly within an evolutionary framework. Here, ultraviolet light is used to reveal and characterize the original shell coloration patterns of 28 species of cone snails from three Neogene coral reef-associated deposits from the Cibao Valley, northern Dominican Republic. These fossils come from the upper Miocene Cercado Fm. and lower Pliocene Gurabo Fm., and range in age from about 6.6-4.8 Ma. Comparison of the revealed coloration patterns with those of extant species allow the taxa to be assigned to three genera of cone snails (Profundiconus, Conasprella, and Conus) and at least nine subgenera. Thirteen members of these phylogenetically diverse reef faunas are described as new species. These include: Profundiconus? hennigi, Conasprella (Ximeniconus) ageri, Conus anningae, Conus lyelli, Conus (Atlanticonus?) franklinae, Conus (Stephanoconus) gouldi, Conus (Stephanoconus) bellacoensis, Conus (Ductoconus) cashi, Conus (Dauciconus) garrisoni, Conus (Dauciconus?) zambaensis, Conus (Spuriconus?) kaesleri, Conus (Spuriconus?) lombardii, and Conus (Lautoconus?) carlottae. Each of the three reef deposits contain a minimum of 14–16 cone snail species, levels of diversity that are similar to modern Indo-Pacific reef systems. Finally, most of the 28 species can be assigned to modern clades and thus have important implications for understanding the biogeographic and temporal histories of these clades in tropical America.
Data from: Annotated type catalogue of the Orthalicoidea (Mollusca, Gastropoda) in the Museum für Naturkunde, Berlin
The type status is described of 96 taxa classified within the superfamily Orthalicoidea and present in the Mollusca collection of the Museum für Naturkunde der Humboldt-Universität zu Berlin. Lectotypes are designated for the following taxa: Orthalicus elegans Rolle, 1895; Bulimus maranhonensis Albers, 1854; Orthalicus nobilis Rolle, 1895; Orthalichus tricinctus Martens, 1893. Orthalicus sphinx tresmariae is introduced as new name for Zebra sphinx turrita Strebel, 1909, not Zebra quagga turrita Strebel, 1909. The following synonyms are established: Zebra crosseifischeri Strebel, 1909 = Orthalicus princeps fischeri Martens, 1893; Orthalicus isabellinus Martens, 1873 = Orthalicus bensoni (Reeve, 1849); Zebra zoniferus naesiotes Strebel, 1909 = Orthalicus undatus (Bruguière, 1789); Porphyrobaphe (Myiorthalicus) dennisoni pallida Strebel, 1909 = Hemibulimus dennisoni (Reeve, 1848); Zebra delphinus pumilio Strebel, 1909 = Orthalicus delphinus (Strebel, 1909); Orthalicus (Laeorthalicus) reginaeformis Strebel, 1909 = Corona perversa (Swainson, 1821); Bulimus (Eurytus) corticosus Sowerby III, 1895 = Plekocheilus (Eurytus) stuebeli Martens, 1885. The taxon Bulimus (Eudioptus) psidii Martens, 1877 is now placed within the family Sagdidae, tentatively in the genus Platysuccinea. Appendices are included with an index to all the types of Orthalicoidea extant (including those listed by Köhler 2007) and a partial list of letters present in the correspondence archives.
Figure 11 in Megalobulimus dryades, a new species from the Atlantic Forest in southeastern Brazil, and redescription of Megalobulimus gummatus (Gastropoda: Strophocheilidae)
Figure 11. Megalobulimus gummatus anatomy: (A) jaw; (B) radula, central region in SEM.
FIGURE 26 in A new species of Cribrarula (Gastropoda: Cypraeidae) from New South Wales, Australia
FIGURE 26. Plot of the first two components of a PCA analysis (PC1 and PC2), representing 66.5% of the variation, using 36 shells from Eastern Australia and eight shell characters (shell length (L); columellar teeth count (CT); umbilicus diameter; CT/L; shell height/width ratio (H/W), CT thickness; anterior terminal thickness; columellar marginal callus). The shells of a few specimens are illustrated (the shell of C. gravida sp. nov., blue triangle, top left, is 35.15 mm long). Specimens identified as C. cribraria melwardi are represented in the figure by red circles, those of C. cribraria cribraria by black diamonds. The albino shell is the holotype of melwardi (Iredale, 1930) (shown in Figs. 8-13).
FIGURES 2225 in A new species of Cribrarula (Gastropoda: Cypraeidae) from New South Wales, Australia
FIGURES 2225. Scanning electron micrographs of radulae: 22) Cribrarula gravida sp. nov., holotype (AMS C. 91000), New South Wales, Australia arrows point to two differences from other radulae shown here (see discussion); 23) C. cribraria melwardi (DMNH 31496), Swinger Reef, Queensland, Australia; 24) C. cribraria cribraria (USNM 773496), Mamanuca Group, Fiji; and 25) C. cribraria cribraria (melanic) (ANSP 271247), Baie Ouemo, New Caledonia.
FIGURES 1-21. 1-6 in A new species of Cribrarula (Gastropoda: Cypraeidae) from New South Wales, Australia
FIGURES 1-21. 1-6) Holotype of Cribrarula gravida sp. nov. from NSW, Australia (AMS C. 91000); 1) dorsal view, with posterior extremity up; 2) labral side view; 3) ventral view; 4) columellar side view; 5) view of the anterior extremity, and 6) view of the posterior extremity; 7) pigmented shell of C. cribraria melwardi from Queensland, Australia (AMS C. 363556); 8-13) holotype of C. cribraria melwardi, from Queensland (AMS C. 57743); 14) large shell of C. cribraria (usually identified as zadela") from Cebu, Philippines (USNM 773378); 15-20) typical shell of C. cribraria cribraria from Queensland (AMS C. 81677); and 21) inflated shell of C. gaskoini from Hawaii (CMB 8-37). Scale bar is 10 mm. Arrows in the figures (13, 16-20) show the following characters: CMC= columellar marginal callus; CT= columellar teeth; DL= dorsal line; DLA= dorsal line angle; FS= fossula; MSu= marginal sulcus; and TR= terminal ridge.
Figure 2 in Activity and reproduction in Megalobulimus paranaguensis (Gastropoda, Eupulmonata): implications for conservation in captivity for a South American land snail
Figure 2. Mean values of activity among observation periods in experiment. The values of were defined as the values of scores of PC1 multiplied by −1 according to Minoretti et al. (2011). Different letters indicates statistical differences between treatments.
Figure 1 in Activity and reproduction in Megalobulimus paranaguensis (Gastropoda, Eupulmonata): implications for conservation in captivity for a South American land snail
Figure 1. Mean number of egg laying of Megalobulimus paranaguensis (Pilsbry & Ihering, 1900) during the experiment.
Figure 8 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 8. Consensus tree of the families of Patellidae and Nacellidae with the position of S. mexicana using maximum likelihood and Bayesian methods based on the mitochondrial COI mtDNA gene. The bootstrap values/posterior probabilities (ML/BI) are indicated under the principal nodes. The taxon names are followed by their GenBank accession numbers (S. mexicana specimens were sequenced in the present study). The shaded area indicates the position of S. mexicana.
Figure 7 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 7. Consensus tree of the families Patellidae and Nacellidae with the position of S. mexicana using maximum likelihood and Bayesian methods based on partial 16S rRNA. The bootstrap values/ posterior probabilities (ML/BI) are indicated under the principal nodes. The taxon names are followed by their GenBank accession numbers (specimen AF058235 belonging to Scutellastra mexicana was also downloaded from GenBank, whereas the other S. mexicana specimens were sequenced in the present study). The shaded area indicates the position of S. mexicana.
Figure 3 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 3. Small specimen BR21. (a) Dorsal view of the shell of the small specimen. (b) Ventral view of the shell of the small specimen. (c) Ventral view of the soft tissue parts showing a diagnostic feature of small specimens, i.e. a 'scalloped' edge of the mantle. Scale bar: 5 cms.
Figure 5 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 5. (a) SEM photograph of a radula. Scale bar: 1 mm. (b) Detail of the pluricuspid lateral tooth (black arrow) and marginal teeth (white arrows). Scale bar: 400 µm. (c) Optical microscope photograph of the radula. Scale bar: 1 mm.
Figure 4 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 4. Large-sized specimen HH1. (a) Dorsal view of the shell of the large-sized specimen. (b) Ventral view of the shell of a large-sized specimen. Scale bar: 10 cms. (c) Detail of the shell surface. (d) Detail of the inner part of the edge. (e) Ventral view of the soft tissue parts showing a diagnostic feature of large-sized specimens, i.e. a 'pearl necklace' within the edge mantle (please note that this is a different specimen than HH1, but this specimen is from the same sampling site and is of a similar size).
Figure 1 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 1. Sampling localities: BR: Baby Reef; CL1: Cleofas 1. Both are located at María Cleofas Island.
Figure 6 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 6. Shells of Scutellastra mexicana (left) and Lottia discors (right). (a) Dorsal view. (b) Ventral view. Scale bar: 4 cms.
Figure 2 in Redescription of the highly endangered species Scutellastra mexicana (Broderip & G.B. Sowerby I, 1829) (Mollusca, Gastropoda)
Figure 2. Three different views of the same shell of Scutellastra mexicana (A, B, and C) recently found on beaches from the type locality Mazatlán. Scale bar: 10 cms.
Figure 2 in Lanayrella, a new Acteonidae genus (Gastropoda, Heterobranchia) from Tierra del Fuego
Figure 2. Lanayrella ringei, syntypes; spm #1: H = 8.0 mm; spm #2: H = 7.7 mm. A. Spm #1, apertural view. B. Spm #1, dorsal view. C. Spm #1, apertural view, under SEM. D. Spm #2, apertural view. E. Spm #1, detail of spire top showing teleoconch sculpture. F. Spm #1, apical view, under SEM. G. Spm #1, detail of body whorl showing teleoconch sculpture under SEM. H. Spm #1, detail of spire top, under SEM, showing fully immersed protoconch. Scale bar = 200 μm.
Figure 1 in Lanayrella, a new Acteonidae genus (Gastropoda, Heterobranchia) from Tierra del Fuego
Figure 1. Lanayrella vagabunda, syntype; H = 8.2 mm. A. Apertural view. B. Dorsal view. C. Apertural view, under SEM. D. Detail of spire top showing teleoconch sculpture. E. Apical view, under SEM. F. Detail of body whorl showing teleoconch sculpture under SEM. G. Detail of spire top, under SEM, showing fully immersed protoconch. Scale bar = 200 μm.
FIGURES 1517. Turbonilla aquilonaria n in Five new species of Turbonilla Risso, 1826 (Gastropoda, Heterobranchia, Pyramidellidae) found off the northeast coast of Brazil º 13 º
FIGURES 1517. Turbonilla aquilonaria n. sp. holotype (UFPE 4443). 15: whole shell, length 4.7 mm; 16: base detail; 17: protoconch detail. Scale bar = 500 µm
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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