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21 results for “Myida”
FIGURE 8. A–C. Sphenia coreanica Habe, 1951. MBM300740 in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 8. A–C. Sphenia coreanica Habe, 1951. MBM300740, length = 5.8 mm. A. Exterior of right valve. B. Interior of right valve. Scale bar (A, B) = 1 mm. C. Close up of surface sculpture. Scale bar = 1 mm. D–L. Sphenia elongata sp. nov., D–L, holotype, MBM267367, length = 8.92 mm. D. Exterior of right valve. E. Exterior of left valve. Scale bar (D, E) = 1 mm. F. Hinge of right valve. Scale bar = 1 mm. G. Interior of right valve. H. Interior of left valve. Scale bar (G, H) = 1 mm. I. Hinge of left valve. Scale bar = 1 mm. J. Close up of umbo on right valve. K. Close up of umbo on left valve. Scale bar (J, K) = 1 mm. L. Close up of surface sculpture. Scale bar = 0.5 mm.
FIGURE 7. A–L in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 7. A–L. Tugonia (Distugonia) sp., A–I, L, MBM188705, length = 9 mm. A. Exterior of right valve. B. Exterior of left valve. Scale bar (A, B) = 2 mm. C. Hinge of right valve. Scale bar = 1 mm. D. Interior of right valve. E. Interior of left valve. Scale bar (D, E) = 2 mm. F. Hinge of left valve. Scale bar = 1 mm. G. Close up of umbo on right valve. H. Close up of umbo on left valve. Scale bar (G, H) = 1 mm. I. Close up of surface sculpture. Scale bar = 1 mm. L. Dorsal view of both valves joined. Scale bar = 2 mm. J & K, MBM188706, length = 7.60 mm. J. Exterior of right valve. K. Interior of right valve. Scale bar (J, K) = 2 mm. M. Tugonia (Distugonia) decurtata (A. Adams, 1851) (after original figure from Sowerby II, 1875: pl. 3, fig. 11). N–O. Tugonia (Distugonia) inopinata (Iredale, 1936) (after original figure from Iredale, 1936: pl. 21, figs. 6, 7).
FIGURE 6. A–K in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 6. A–K. Tugonia (Tugonia) huanghaiensis Xu, 1987. A–F, holotype, MBM no.73M-030, length = 19.8 mm. A. Exterior of right valve. B. Exterior of left valve. Scale bar (A, B) = 2 mm. C. Hinge of left valve. Scale bar = 2 mm. D. Interior of right valve. E. Interior of left valve. Scale bar (D, E) = 2 mm. F. Close up of surface sculpture. Scale bar = 2 mm. G–K, paratype, MBM no.57M-101, length = 16.2 mm. G. Exterior of right valve. H. Exterior of left valve. Scale bar (G, H) = 5 mm. I. Hinge of left valve. Scale bar = 2 mm. J. Interior of right valve. K. Interior of left valve. Scale bar (J, K) = 5 mm. L. Tugonia (Distugonia) decurtata (A. Adams, 1851). From Okutani (2000: pl. 508, fig. 4, with permission from author).
FIGURE 5. A–F in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 5. A–F. Cryptomya (Venatomya) sinensis (Xu, 1987), holotype, MBM300741, length = 19.0 mm. A. Exterior of right valve. B. Exterior of left valve. Scale bar (A, B) = 5 mm. C. Hinge of left valve. Scale bar = 2 mm. D. Interior of right valve. E. Interior of left valve. Scale bar (D, E) = 5 mm. F. Close up of surface sculpture. Scale bar = 2 mm. G. Close up of umbones of C. (V.) elliptica (left) and C. (V.) sinensis (right). Scale bar = 5 mm. H–M. Paramya recluzi (A. Adams, 1864). MBM300739, length = 9.6 mm. H. Exterior of right valve. I. Exterior of left valve. Scale bar (H, I) = 2 mm. J. Hinge of left valve. Scale bar = 2 mm. K. Interior of right valve. L. Interior of left valve. Scale bar (K, L) = 2 mm. M. Close up of surface sculpture. Scale bar = 1 mm.
FIGURE 4. A in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 4. A. Cryptomya (Cryptomya) busoensis Yokoyama, 1922 (from Xu, 1987: fig. 1c). Scale bar = 5 mm. B–O. Cryptomya (Venatomya) elliptica (A. Adams, 1851). B–E. MBM264725, length = 11.4 mm. B. Exterior of right valve. C. Exterior of left valve. D. Interior of right valve. E. Interior of left valve. Scale bar (B–E) = 5 mm. F–I. MBM264726, length = 14.9 mm. F. Exterior of right valve. G. Exterior of left valve. H. Interior of right valve. I. Interior of left valve. Scale bar (F–I) = 5 mm. J–O. MBM264727, length = 23.3 mm. J. Exterior of right valve. K. Exterior of left valve. L. Interior of right valve. M. Interior of left valve. Scale bar (J–M) = 5 mm. H. Hinge of left valve. Scale bar = 5 mm. O. Close up of surface sculpture. Scale bar = 5 mm.
FIGURE 3. A–O. Mya arenaria Linnaeus, 1758. A–F, MBM264720 in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 3. A–O. Mya arenaria Linnaeus, 1758. A–F, MBM264720, length = 101.3 mm. A. Exterior of right valve. B. Exterior of left valve. Scale bar (A, B) = 20 mm. C. Close up of chondrophore of left valve. Scale bar = 10 mm. D. Interior of right valve. E. Interior of left valve. Scale bar (D, E) = 20 mm. F. Close up of surface sculpture. Scale bar = 5 mm. G–I, MBM264731, length = 29.7 mm. G. Exterior of right valve. H. Exterior of left valve. Scale bar (G, H) = 5 mm. I. Close up of chondrophore on left valve. Scale bar = 2 mm. J–L. MBM119742, length = 96.6 mm. J. Exterior of right valve. K. Exterior of left valve. Scale bar (J, K) = 20 mm. L. Close up of chondrophore of left valve. Scale bar = 10 mm. M–O. MBM119743, length = 63.0 mm. M. Exterior of right valve. N. Exterior of left valve. Scale bar (M, N) = 10 mm. O. Close up of chondrophore of left valve. Scale bar = 5 mm.
FIGURE 2 in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 2. Map of China seas and adjacent waters. Solid lines indicate ocean currents (after Zheng et al. 2006: fig. 1, with permission from author). Abbreviations: KS, Kuroshio Warm Current; NEC, North Equatorial Current; SCC, South China Sea Warm Current; TC, Taiwan Warm Current; TSC, Tsushima Warm Current; YSC, Yellow Sea Warm Current. 1, Changjiang River (Yangtze) estuary; 2, Jiaozhou Bay; 3, Peter the Great Bay.
FIGURE 1 in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species
FIGURE 1. Shell nomenclature used in this study. A. Exterior of right valve. B. Interior of left valve. C. Dorsal view of both valves joined. D. Hinge of left valve. E. Hinge of right valve.
Figure 10 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 10 Specimens of Indospheniakayalum. a–c holotype d–i paratypes showing size series and variations j, k interior and exterior of cleaned shells.
Figure 3 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 3 Scanning electron micrographs of hinges of myids and Potamocorbula. Left hand series are right valves, left hand series are left valves with the chondrophore viewed from above. aMyaarenariabMyatruncatacSpheniabinghamidIndospheniakayalumePotamocorbulaamurensis. Scale bar: 500 µm. Abbreviations: as, anterior socket. at, anterior tooth. fl, posterior flange. lg, ligament plate. ps, posterior socket. pst, pseudotooth. r, ridge. rs, resilifer.
Figure 7 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 7 Scanning electron micrographs of the hinges of Indosphenia species. a chondrophore of I.abbreviata typical form from Port Canning b as a but from narrow form c as a but from distorted form d chondrophore of syntype of Cuspidariaannandaleie chondrophore of I.sowerbyi from Adyar f as e but from Cooum g right valve pseudo tooth in I.abbreviatah right valve pseudotooth in syntype of Cuspidariaannandaleii right valve pseudotooth in I.sowerbyij–k chondrophores in small and large specimens of I.kayaluml–m right valve pseudo tooth small and large specimens of I.kayalumn–o chondrophore and right valve pseudo tooth of I.cochinensis. Scale bar: 5 mm.
Figure 1 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 1 Map of India showing locations of sample sites. Insert showing detailed location of type locality of Indospheniakayalum within the Cochin Backwater.
Figure 6 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 6 Variations of Indospheniaabbreviata all from Port Canning. a, b narrow form , NHMUK 20170343 d–ftumescence form NHMUK 88.12.4.703 e Scanning electron micrograph of interior of d showing radial ridges gintumescence form NHMUK 91.9.19.20. Scale bar: 5 mm.
Figure 2 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 2 Phylogram showing Maximum Likelihood method based on the Hasegawa-Kishino-Yano model. The tree with the highest log likelihood (- 2576.44) is shown. The percentage of trees in which the associated taxa clustered together is shown next to the branches where such values exceed 95%. Initial tree(s) for the heuristic search were obtained automatically by applying Neighbor-Join and BioNJ algorithms to a matrix of pairwise distances estimated using the Maximum Composite Likelihood (MCL) approach, and then selecting the topology with superior log likelihood value. Grey area indicates Myidae.
Figure 5 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 5 Shell variation in Indospheniaabbreviata. a–d typical form from Port Canning, NHMUK 20170342 e, f distorted varieties from Port Canning, NHMUK 20170342 g, h syntype of Corbulaalcocki Port Canning, NHMUK 1909.8.18.33 i, j syntype of Corbulagracilis , Port Canning NHMUK 1909.8.18.32 k–m syntype of Cuspidariaannandalei NMW1955.158.18922. Scale bar: 5 mm.
Figure 13 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 13 Box plots of the ratios of four parameters for shell shape in five populations of Indosphenia. a length to height b posterior length to anterior length c length to tumidity d height to tumidity. Abbreviations: abb, typical I.abbreviata in lot NHMUK 20170342. abb var, I.abbreviata variations in lots NHMUK20170343, NHMUK 91.9.19.20.& NHMUK 88.12.4.703. kayal, I.kayalum. sow ad, I.sowerbyi from Adyar. sow co, I.sowerbyi from Cooum.
Figure 4 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 4 Comparison of shells of three species of epibyssate nestling species of Sphenia. a–cSpheniabinghami, British Isle. d–jSpheniaperversa, Kungkraben Bay, Thailand m–nSpheniaruepellii, Yemen, Arabian Sea.
Figure 11 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 11 a–d Gross anatomy of Indospheniakayaluma left side after removal of the shell b left side after removal of shell and mantle c exterior view of the siphonal apertures d interior view of the siphonal apertures e Gross anatomy of Spheniabinghami from the left side after removal of the shell and anterior mantle. Abbreviations: aa, anterior adductor muscle. exh, exhalant siphon. ft, foot. id, inner demibranch. inh, inhalant siphon. irt, inner ring of tentacles. lp, labial palps. od, outer demibranch. ort, outer ring of tentacles. pa, posterior adductor muscle. per, periostracum. pg, pedal gape. ppr, posterior pedal retractor muscle. rod, reflected portion of outer demibranch. sph, siphons. sphm, siphonal muscles.
Figure 9 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 9 Scanning electron micrographs of the prodissoconchs of Indosphenia species. aI.abbreviata elongate form bI.abbreviata typical form cI.sowerbyidI.kayalum.
Figure 8 from: Oliver PG, Hallan A, Jayachandran PR, Joseph P, Sanu VF, Bijoy Nandan S (2018) Taxonomy of myid bivalves from fragmented brackish-water habitats in India, with a description of a new genus Indosphenia (Myidae, Myoidea, Myidae). ZooKeys 799: 21-46. https://doi.org/10.3897/zookeys.799.25843
Figure 8 Variations of Indospheniasowerbyi. a–c typical form from Adyar river d–e internal views of cleaned valves from Adyar river, pallial line false colour added d. f specimen with epifauna attached to posterior end, from Adyar river g–h specimen from Cooum river j internal showing blotched pattern on dry mantle tissue k posterior sculptured variety from Cooum river l–n Syntype of Spheniasowerbyi from Ariancoupan, Pudicherry NHMUK 1893.3.16.6-7. Scale bar: 5 mm.
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