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1,088 results for “Bivalves”
FIG. 7 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 7. Unionicola (Mutelicola) planicurvata male, Prep. 1366, holotype. (a) I-Leg.2– 6 right; (b) II-Leg.1–6 right; (c) III-Leg.2–6 right; (d) IV-Leg.2 –6 right; (e) IV-Leg.3, distal setae; (f) IV-Leg.4, distal setae; (g) IV-Leg.5, distal setae; (h) IV-Leg.6, terminal claws.
FIG. 5 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 5. Unionicola (Mutelicola) blayi. (a) Genital Želd, female, Prep. 1363; (b) right palp, female, Prep. 1363; (c) genital Želd (tilted), female, Prep. 1364; (d) left palp, female, Prep. 1364.
FIG. 4 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 4. Unionicola (Mutelicola) blayi. (a–d) female, Prep. 1361, allotype. (a) Dorsal surface; (b) ventral surface; (c) left palp; (d) right palp and PV; (e) genital eld (tilted), female, Prep. 1375; (f, g) genital eld female, Prep. 1375 in ventral and lateral views respectively and gured prior to nal microscope preparation.
FIG. 6 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 6. Unionicola (Mutelicola) planicurvata. (a–e) male, Prep. 1366, holotype. (a) Dorsal surface; (b) ventral surface; (c) genital eld; (d) left palp; (e) right palp; (f) genital eld (posterior view) male, Prep. 1367; (g) left palp, male, Prep. 1367; (h) left palp, male, Prep. 1365; (i) PV left palp, male, Prep. 1365; (j) right palp, male, Prep. 1365; (k) PV right palp, male, Prep. 1365.
FIG. 1 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 1. Unionicola (Mutelicola) blayi, male, Prep. 1360, holotype. (a) Dorsal surface; (b) ventral surface; (c) genital Želd; (d) left palp; (e) PV left; (f) right palp.
FIG. 3 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 3. Unionicola (Mutelicola) blayi, male, Prep. 1360, holotype. (a) I-Leg.2–6; (b) II-Leg.2–6; (c) III-Leg.2–6; (d) IV-Leg. 1– 6.
FIG. 2 in Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships
FIG. 2. Unionicola (Mutelicola) blayi. (a) Left palp, male, Prep. 1356; (b) right palp, male, Prep. 1356; (c) right palp, male, Prep. 1357; (d) left palp, male, Prep. 1359; (e) right palp, male, Prep. 1359; (f) left palp, male, Prep. 1358; (g) PV, left palp, male, Prep. 1358; (h) right palp, male, Prep. 1358; (i) PV, right palp, male, Prep. 1358; (j) genital Želd, male, Prep. 1356; (k) genital Želd, male, Prep.1358; (l) genital Želd, male, Prep. 1357.
Figure 11 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 11. Tihkia silesiaca sp. nov. from the latest Triassic of Lisowice: restoration of the external view of right valve (A) and dorsal muscle attachments (B).
Figure 5 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 5. Possible unionoids from the Mid Triassic (Anisian) Wianamatta Shales at Sydney, Australia; camera lucida drawings of NHM specimens under collective numbers. A–I, Protovirgus dunstani (Etheridge, 1888). J–X, Unionella bowralensis Etheridge 1888.
Figure 2 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 2. Beak sculpture on the shell of various unionoids. A, juvenile holotype specimen ZPAL AbIII/2210 of Silesunio parvus gen. et sp. nov. from the early Late Triassic of Krasiejów. B, juvenile recent Margaritifera margaritifera from a stream in Germany (specimen collected and supplied by Reinhard Altmüller). C, recent Unio tumidus from Krutynia River, Poland. D, Anodonta anatina from the same site.
Figure 3 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 3. Beak sculpture of the unionoids. A, 'Unio' andersoni Hudson, 1963, specimen LEIUG 110395, from the Mid Jurassic (Bathonian) Kildonnan Member of the Lealt Shale Formation, Scotland. B, Parreysia from the Pliocene of Sivalik, India (unnumbered specimen associated with specimen NHM 83043). C, 'Unio wateleti Deshayes', 18, unnumbered NHM specimen from the early Eocene of Soisson, France. D, 'Unio' solandrei Sowerby, 1826, specimen NMH 72606 from the late Eocene Headon Beds at Hardwell, England. E, 'Unio' valdensis (Mantell, 1844), specimen NHM HGR 52 392828 from the Early Cretaceous (Hauterivian?) Wealden beds at Brook village, Isle of Wight. F, 'Unio' gualterii Sowerby, 1836 from the Wealden Hastings Sandstone at Royal Tunbridge Wells, England, specimen MB.M. 6915. G, 'Unio' menkei Koch & Dunker, 1837, diluvial erratic boulder from Kreuzberg, Berlin, specimen MB.M. 6907. (A–E, camera lucida drawings).
Figure 10 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 10. Tihkia silesiaca sp. nov. from the latest Triassic of Silesia (A–D) and Lisowice (E–H; external views of isolated valves and the natural mould). A–D, right valve with wall transformed into sparitic calcite ZPAL V33/310 from Marciszów: A, magnification of umbo showing concentric juvenile ribs; B–D, external, inner, and dorsal views of the specimen. E–F, moulds of right valve ZPAL V33/299 and left valve ZPAL V33/301 from Lisowice. G–H, holotype, mould of articulated valves ZPAL V.33/286 in lateral and dorsal views, respectively.
Figure 6 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 6. The proposed most parsimonious (in terms of as late as possible origin of evolutionary novelties) scenario of evolutionary transformations leading from the trigonioids to the main groups of the unionoids. Juvenile shell ornamentation of some unionoids and diagrammatic representation of probable changes in the foot elevator muscle attachments are shown. Note that the Etheriidae in the traditional meaning is probably polyphyletic (Bogan & Hoeh, 2000). Alternative interpretations with single and double origin of W-shaped juvenile ribs are represented by solid and broken lines, respectively.
Figure 1 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 1. Phosphatized gill supports in Silesunio parvus gen. et sp. nov. from the early Late Triassic lacustrine deposits at Krasiejów, Southern Poland. A, general view of specimen ZPAL AbIII/2208 with valves in 'butterfly position'; gills visible as darker striated structures owing to staining with dark iron minerals. B, displaced sets of gill supports show bending independent of each other owing to the lack of interconnections (which proves a filibranch organization). C, D, specimen ZPAL AbIII/2168 with a more typical preservation of gill blades.
Figure 9 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 9. Diagrammatic presentation of variability in disposition of the umbonal musculature in Silesunio parvus gen. et sp. nov. from the early Late Triassic of Krasiejów; camera lucida drawings. Specimens ZPAL AbIII: A, B, 2161–2162; C, D, 2165–2166; E, 2176, F, 2185; G, 2199; H–O, 2199–2205.
Figure 4 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 4. Development of dorsal musculature in the anthracosiids and trigonodids; camera lucida drawings. A, B, Carbonicola aquilina (Sowerby, 1840), internal moulds NHM 2217 and 2216 from the Late Carboniferous at Rotterham in Yorkshire, England. C–E, Carbonicola subconstricta (Sowerby, 1812) internal moulds NHM NL 1770, 1766, and 1769. F, shell internal mould NHM 36375 of probable juvenile Trigonodus [labelled?Myophoria ovata (Goldfuss, 1837) var.], from the Mid Triassic (Ladinian) of Rottweil, Württemberg, Germany. G–J, Unionites muensteri Wissmann, 1841; internal moulds NHM 36374 and NHM L 4058 from the Late Triassic St. Cassian Beds (G, H) and the Heiligkreutz Beds of South Tirol, Italy (I), and specimen from the latter locality with shell preserved (J), held under the same collection number NHM 35373.
Figure 8 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 8. Silesunio parvus gen. et sp. nov. from the early Late Triassic of Krasiejów: restoration of the interior of left valve (A), external view of right valve (B), and ventral view of the hinge and dorsal muscle attachments (C).
Figure 7 in Umbonal musculature and relationships of the Late Triassic filibranch unionoid bivalves
Figure 7. Silesunio parvus gen. et sp. nov. from the early Late Triassic of Krasiejów: 'butterfly style' opened valves. A, ZPAL AbIII/2164; B, ZPAL AbIII/2167.
Figure 3 in Molecular phylogeny and classification of the chemosymbiotic bivalve family Lucinidae (Mollusca: Bivalvia)
Figure 3. Molecular phylogeny of the Lucinidae based on the single gene analysis of cytochrome b produced by Bayesian analysis using MRBAYES. Support values are Bayesian posterior probabilities (%). Details of taxa are given in Table 1.
Figure 2 in Molecular phylogeny and classification of the chemosymbiotic bivalve family Lucinidae (Mollusca: Bivalvia)
Figure 2. Molecular phylogeny of the Lucinidae based on the single gene analysis of 28S rRNA produced by Bayesian analysis using MRBAYES. Support values are Bayesian posterior probabilities (%). Details of taxa are given in Table 1.
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