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45 results for “Venerida”
Figure 1 in Short Communication Range extension and first record of Meretrix lusoria (Röding, 1798) (Mollusca: Bivalvia: Veneridae) from Indian coastal waters
Figure 1. Meretrix lusoria (Röding, 1798), (A) exterior, (B) interior, (C) hinge region; scale bar: 10 mm.
Figure 4 in The global freshwater bivalve checklist's extension: Freshwater occurrences and phylogenetic position of Galatea clams from West Africa (Venerida: Donacidae)
Figure 4. Shells of Galatea paradoxa from freshwater section of Niger River, Nigeria (sample RMBH biv1086, Yenagoa). Scale bar = 10 mm. (Photos: Ilya V. Vikhrev).
Figure 3 in The global freshwater bivalve checklist's extension: Freshwater occurrences and phylogenetic position of Galatea clams from West Africa (Venerida: Donacidae)
Figure 3. Shells of Galatea schwabi from Sanaga River, Cameroon. (A-B) Topotypes RMBH biv800, Mouanko (lower reaches, slightly brackish section). (C-D) Specimens RMBH biv801, Monatélé (middle reaches, freshwater section). Red arrows show well-developed muscle attachment scars. Scale bar = 10 mm. (Photos: Artem A. Lyubas).
Figure 5 in The global freshwater bivalve checklist's extension: Freshwater occurrences and phylogenetic position of Galatea clams from West Africa (Venerida: Donacidae)
Figure 5. Maximum likelihood (IQ-TREE) phylogeny of Bivalvia (Venerida and Adapedonta) based on the COI gene sequences (Table 1). A Galatea member is dark red. Scale bar indicates the branch lengths (substitutions per site). Black numbers near nodes indicate the ultrafast bootstrap support (BS) values.
Figure 1 in The global freshwater bivalve checklist's extension: Freshwater occurrences and phylogenetic position of Galatea clams from West Africa (Venerida: Donacidae)
Figure 1. Occurrences of Galatea schwabi (red stars) and Galatea paradoxa (light green stars). The locality data is given in Table 2. Freshwater basins are colored as follows: Sanaga (1), Cross (2), Niger (3), and Volta (4). The red dash indicates the Edea Hydroelectric Power Station's dam on the Sanaga River. (Map: Mikhail Y. Gofarov).
Figure 4 in Estimation of individual growth of the violet oyster Chama coralloides Reeve, 1846 (Bivalvia: Venerida) using Schnute model cases
Figure 4. Fitted growth curves for the best cases of the Schnute model for a population of C. coralloides in Acapulco, Guerrero, Mexico (* indicates the best model).
Figure 2 in Estimation of individual growth of the violet oyster Chama coralloides Reeve, 1846 (Bivalvia: Venerida) using Schnute model cases
Figure 2. Monthly frequency distribution of lengths (bars) and modal groups (curves) for C. coralloides in Acapulco, Guerrero, Mexico.
Figure 6 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 6. Average profile of the southern and northern areas in Caraguatatuba Bay. The distance of 0 m (x-axis) corresponds to the beginning of the vegetation in the dry sand zone (southern) and at the berm (northern).
Figure 1 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 1. Location of Caraguatatuba Bay in the state of São Paulo, Brazil, and of the study areas (southern and northern). The numbers (1–14) indicate the stations sampled only in the along-shore study.
Figure 4 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 4. Mean number of individuals per quadrat (¡SE; n56) and mean shell length (mm; ¡SE; n is variable) in the two areas (southern and northern) and in the different tidal levels (in relation to MLW) in Caraguatatuba Bay. The comparisons (one-way ANOVA) among tidal levels within each area are presented in Table I. The letters (southern) and the numbers (northern) represent the results of the a posteriori SNK test. The horizontal bar indicates non-significant differences in the SNK test.
Figure 5 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 5. Mean number of individuals (fourth-root transformed; ¡SE; n55) and mean shell length (mm; ¡SE; n is variable) in the two areas (southern and northern) and at different subtidal depths in Caraguatatuba Bay. The comparisons (two-way ANOVA) between areas and among depths are presented in Table II. The letters (southern) and the numbers (northern) represent the results of the a posteriori SNK test, and the horizontal bar indicates non-significant differences in the SNK test.
Figure 3 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 3. Zonation (mean number of individuals per quadrat ¡SE; n56) of Tivela mactroides in the intertidal region of the southern and northern areas of Caraguatatuba Bay in relation to MLW. Tidal levels correspond to different distances from 20.2 m in the two areas.
Figure 9 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 9. Mean number of individuals (fourth-root transformed;+SE; n54) and mean shell length (mm;+SE; n5variable) in the four sub-areas in the southern and northern areas in Caraguatatuba Bay and in 0.0 and 0.4 m (in relation to MLW). The comparisons (two-way ANOVA) between areas and between tidal levels are presented in Table IV. The horizontal bars indicate non-significant differences in the SNK test.
Figure 8 in Along- and across-shore components of the spatial distribution of the clam Tivela mactroides (Born, 1778) (Bivalvia, Veneridae)
Figure 8. Mean grain size (phi;+SE; n54) and sorting coefficient (phi;+SE; n54) in the four sub-areas in the southern and northern areas in Caraguatatuba Bay and in the 0.0 and 0.4 m tidal levels (in relation to MLW). Data are presented for each area and sub-area. The results of the nested three-way ANOVA are presented in Table III. The horizontal bars indicate non-significant differences in the SNK test.
Phylogeny of the Eocene Antarctic Tapetinae Gray, 1851 (Bivalvia: Veneridae) from the La Meseta and Submeseta formations
<p><span>Systematic analysis shows that the Southern Hemisphere bivalve genus <i>Retrotapes </i>includes the Antarctic species <i>R. antarcticus</i>, <i>R. newtoni</i>, and <i>R. robustus</i> and recognizes for the first time the presence of <i>Katelysia </i>represented by <i>K. florentinoi</i>. Two new genera were erected in this study: <i>Marciachlys</i> new genus to include <i>M. inflata </i>new combination, and <i>Adelfia</i> new genus, which includes <i>A. austrolissa</i> new combination and <i>A. omega</i> new species from the Eocene of Antarctica, and the late Eocene Chilean <i>A. arenosa</i> new combination. <i>Eurhomalea carlosi</i> was synonymized with <i>K. florentinoi</i>; <i>Cyclorismina marwicki</i> with <i>R. antarcticus;</i> <i>Gomphina iheringi</i> was considered an indeterminate species; and <i>Cockburnia lunulifera</i> was excluded from the Tapetinae. These systematic assignments are supported by a phylogenetic analysis, which recognizes an Austral clade of Tapetinae, comprising all the genera mentioned above, and additionally <i>Marcia</i>, <i>Paleomarcia</i>, <i>Atamarcia</i>, and <i>Protapes</i>.</span></p>
Figure 2 in The global freshwater bivalve checklist's extension: Freshwater occurrences and phylogenetic position of Galatea clams from West Africa (Venerida: Donacidae)
Figure 2. Sanaga River in Cameroon, habitat of Galatea schwabi. (Photo: Jean J. Braun).
Figure 3 in Estimation of individual growth of the violet oyster Chama coralloides Reeve, 1846 (Bivalvia: Venerida) using Schnute model cases
Figure 3. Modal progression of individual cohorts for C. coralloides in Acapulco, Guerrero, Mexico.
Figure 1 in Estimation of individual growth of the violet oyster Chama coralloides Reeve, 1846 (Bivalvia: Venerida) using Schnute model cases
Figure 1. Monthly frequency of length of C. coralloides in Acapulco, Guerrero, Mexico.
Phylogeny of the Eocene Antarctic Tapetinae Gray, 1851 (Bivalvia: Veneridae) from the La Meseta and Submeseta formations
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Figure 7 in The new phylogenetic relationships in Veneridae (Bivalvia: Venerida)
Figure 7. Shell of Anomalodiscus squamosus (A–D) and Timoclea scarbra (E–H). A, E, external view of left valve and internal view of right valve. B, F, sculpture. C, G, hinge. D, H, fluted crenulations.
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