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14 results for “Pisidium”
FIGURES 6A–G. Pisidium sterkianum, anatomy. A, B in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 6A–G. Pisidium sterkianum, anatomy. A, B. Arrangement of inner radial mantle and siphonal muscles. C. Distribution of scars of inner radial mantle muscles. D. Open nephridia, dorsal view. E. Closed nephridium, lateral view. F, G. Inner demibranchs, inner view, showing brood sac in an earlier (F) and advanced (G) stage of development. (al: ascending lamellae; as: anal siphon; bs: brood sac; dl: descending lamellae; dln: dorsal lobe of nephridium; e: embryo; irm: inner radial mantle muscles; irms: scars of inner radial mantle muscles; ll: lateral loop; pa: posterior adductor muscle; pd: pericardial duct; pl: pallial line; pss: pre-siphonal suture; sr1: anal siphon retractor; sr2: retractor muscles corresponding to lacking inhalant opening)
FIGURES 2A–G. Pisidium dorbignyi, anatomy. A. Siphonal and mantle edge musculature. B. Inner radial mantle muscles, lateral view. C in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 2A–G. Pisidium dorbignyi, anatomy. A. Siphonal and mantle edge musculature. B. Inner radial mantle muscles, lateral view. C. Distribution of scars of inner radial mantle muscles. D. Inner view of inner demibranch showing the upper position of brood sac. E–G. Nephridium (11, 13: dorsal view of left and right portions; 12: lateral view). (al: ascending lamellae; as: anal siphon; bs: brood sac; dl: descending lamellae; dln: dorsal lobe of nephridium; irm: inner radial mantle muscles; irms: inner radial mantle muscle scars; ll: lateral loop of nephridium; pa: posterior adductor muscle; pl: pallial line; pss: pre-siphonal; sr1: anal siphon retractor; sr2: retractor muscles corresponding to lacking inhalant opening).
FIGURES 5A–D in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 5A–D: Pisidium sterkianum. A, B. Syntypes (ANSP 70490). A. Right valve, lateral view. B. Posterior view. C, D. Pisidium sterkianum. Specimens from Arroyo Miguelín (MLP 5061). C. Left valve, lateral view. D. Left valve, inner view. Scale bars: A–D = 1 mm.
FIGURES 8A–F. Pisidium vile, anatomy. A, B in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 8A–F. Pisidium vile, anatomy. A, B. Lateral views of left (38) and right (39) inner mantle border showing siphonal and inner radial mantle muscles. C. Distribution of scars of inner radial mantle muscles. D. Inner view of inner demibranch showing position of developing brood sac. E. Left nephridium, dorsolateral view. F. Nephridia, dorsal view. (al: ascending lamellae; bs: brood sac; dl: descending lamellae; dln: dorsal lobe of nephridium; irm: inner radial mantle muscles; irms: scars of inner radial mantle muscles; ll: lateral loop of nephridium; pa: posterior adductor muscle; pl: pallial line; sr1: anal siphon retractor; sr2: retractor muscles corresponding to the lacking inhalant opening).
FIGURES 1A–F. Pisidium dorbignyi. A in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 1A–F. Pisidium dorbignyi. A. Neotype (MHNM 15544), right valve, outer view. B–F. P. dorbignyi (MLP 10497). B. Posterior view. C. Detail of the escutcheon. D. Left valve, inner view. E. Dorsal view. F. Right valve, inner view. Scale bars: A, B, D–F. = 500 μm; C = 200 μm.
FIGURES 7A–F. Pisidium vile. A, B in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 7A–F. Pisidium vile. A, B. Syntypes (ANSP 70489). A. Right valve, lateral view. B. Posterior view. C–F. Specimens from Arroyo Miguelín (MLP 5665). C. Posterolateral view, detail of escutcheon. D. Right valve, lateral view. E. Left valve, inner view. F. Right valve, inner view. Scale bars: A, B, D–F = 500 µm; C = 200 µm.
FIGURES 4A–D. Pisidium lebruni, anatomy. A. Gross anatomy. B in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 4A–D. Pisidium lebruni, anatomy. A. Gross anatomy. B. Left nephridium in dorsal view. C. Nephridia in lateral view, open type at left, closed type at right. D. Inner view of inner demibranch showing the position of brood sac in early stage of development. (aa. anterior adductor muscle; al: ascending lamellae; as: anal siphon; bs: brood; dl: descending lamellae; dln: dorsal lobe of nephridium; f. foot; h: heart; irm: inner radial mantle muscles; ld: left demibranch; ll: lateral loop of nephridium; n: nephridium; pa: posterior adductor muscle; pd: pericardial duct; pr: pedal retractor muscle; rd: right demibranch).
FIGURES 3A–C. Pisidium lebruni. A in Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America
FIGURES 3A–C. Pisidium lebruni. A. Lectotype (MNHN, Paris), outer lateral view of right valve. B, C. Paralectotypes (MNHN, Paris). B. Right valve, inner view. C. Left valve, outer view. Scale bars: A–C = 1 mm.
Figure 5 from: Rassam H, Moutaouakil S, Benaissa H, Albrecht C, Ghamizi M (2020) First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave. Subterranean Biology 34: 99-108. https://doi.org/10.3897/subtbiol.34.50916
Figure 5 Position and shapes of cardinal teeth and ligament pits in left (a) and right valve (b). c: cardinal teeth.
Figure 4 from: Rassam H, Moutaouakil S, Benaissa H, Albrecht C, Ghamizi M (2020) First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave. Subterranean Biology 34: 99-108. https://doi.org/10.3897/subtbiol.34.50916
Figure 4 Mean overall shell outline shape of the four adult specimens of P. subtruncatum. The mean shape was generated from semilandmarks coordinates of the right valves using the tpsRelw.
Figure 3 from: Rassam H, Moutaouakil S, Benaissa H, Albrecht C, Ghamizi M (2020) First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave. Subterranean Biology 34: 99-108. https://doi.org/10.3897/subtbiol.34.50916
Figure 3 Two specimens of P. subtruncatum from Ait M'hamed cave a, d external view of the shell of the left and right sides of both specimens b, e dorsal view of both specimens c, f internal view of left and right valves of both specimens.
Figure 2 from: Rassam H, Moutaouakil S, Benaissa H, Albrecht C, Ghamizi M (2020) First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave. Subterranean Biology 34: 99-108. https://doi.org/10.3897/subtbiol.34.50916
Figure 2 Cave topography. Red points: Sampling localities (green crosses included), green crosses: P. subtruncatum occurence.
Figure 1 from: Rassam H, Moutaouakil S, Benaissa H, Albrecht C, Ghamizi M (2020) First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave. Subterranean Biology 34: 99-108. https://doi.org/10.3897/subtbiol.34.50916
Figure 1 Study area Ait M'hamed cave a The cave entrance b the sampling and c the inside of the cave (Moutaouakil 2019).
Figure 6 from: Rassam H, Moutaouakil S, Benaissa H, Albrecht C, Ghamizi M (2020) First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave. Subterranean Biology 34: 99-108. https://doi.org/10.3897/subtbiol.34.50916
Figure 6 Map of occurrence localities of Pisidium subtruncatum from this paper and previous record (red triangles).
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