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18 results for “Mactroidea”
Figure 18 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 18. The anatomy of Paphies elongata (a and b) compared with that of Donax hanleyanus (c and d), both drawn to the same relative scale (for actual scales see the earlier illustrations). (a) and (c) are views of the apertures of the inhalant siphons; (b) and (d) are the internal organs of the mantle cavity showing the visceral mass and foot, the musculature, the orientation of the ctenidia and labial palps and the simplified intestine. (c) is re-drawn after Luzzatto and Penchaszadeh (2001, fig. 1); (d) is a compendium of re-drawn figures from Narchi (1978). (See previous illustrations for interpretations of structure).
Figure 15 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 15. Paphies elongata. The course of the intestine in the visceral mass as seen from the right side. AA(1), anterior adductor muscle(1); AN, anus; APR, anterior pedal retractor muscle; CSS, crystalline style sac; DD, digestive diverticulae; DEF, dorsal extension of the foot; EMG, expanded region of the mid gut; F, foot; G, gonad; H, heart; HF, heel of the foot; HG, hind gut; M, mouth; MG, mid gut; PA, posterior adductor muscle; PPR, posterior pedal retractor muscle; R, rectum.
Figure 11. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 11. Paphies elongata. A more detailed illustration of the anterior adductor muscle complex. AA(1), anterior adductor muscle (1); AA(2), anterior adductor muscle (2); APEM, anterior pedal elevator muscles; APP, anterior pedal protractor muscle; APR, anterior pedal retractor muscle scar; VM, visceral mass.
Figure 9 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 9. Paphies elongata. (a) the organs of the mantle cavity as seen from the left side after removal of the left shell valve and mantle lobe. (b) A diagrammatic transverse section through the left ctenidium showing the ciliary currents. AA(1), anterior adductor muscle(1); APR, anterior pedal retractor muscle; CA, ctenidial axis; DEF, dorsal extension of the foot; ES, exhalant siphon; FMM, fused mantle margin; HF, heel of the foot; ID, inner demibranch; IS, inhalant siphon; F, foot; OD, outer demibranch; OLP, outer labial palp; PA, posterior adductor muscle; PPR, posterior pedal retractor muscle; PR, prodissoconch; SAE, supra-axial extension of the outer demibranch; VMFG, ventral margin food groove of the inner demibranch.
Figure 5. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 5. Paphies elongata. A more detailed view of the hinge plate of the right valve showing the structure of the ligament. ACT, anterior cardinal tooth; ALT, anterior lateral tooth; AOLL, anterior outer ligament layer; ILL, inner ligament layer; P, periostracum; PCT, posterior cardinal tooth; PLT?, possible posterior lateral tooth; POLL, posterior outer ligament layer; PR, prodissoconch; RE, resilifer; S, socket.
Figure 4 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 4. Paphies elongata. Internal views of (a) the left and (b) the right hinge plates. ACT, anterior cardinal tooth; ALT, anterior lateral tooth; L, ligament; PCT, posterior cardinal tooth; PLT?, possible posterior lateral tooth; S, socket.
Figure 3 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 3. Paphies elongata. An internal view of the right shell valve showing the hinge plate and the muscle scars. The black dot indicates the position of the only naticid drill hole found in any of the empty valves collected. AA(1), anterior adductor muscle scar(1); AA(2), anterior adductor muscle scar (2); APP, anterior pedal protractor muscle scar; APR, anterior pedal retractor muscle scar; PA, posterior adductor muscle scar; PG, pedal gape sinus scar; PL, pallial line scar; PPR, posterior pedal retractor muscle scar; PS, pallial sinus; U, umbo.
Figure 13 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 13. Paphies elongata. The ciliary currents of the left mantle lobe. AA(1), anterior adductor muscle(1); AA(2), anterior adductor muscle(2); APR, anterior pedal retractor muscle; PA, posterior adductor muscle; PGS, pedal gape sinus scar; PL, pallial line; PPR, posterior pedal retractor muscle; PR, prodissoconch; PS, pallial sinus.
Figure 1. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 1. Paphies elongata. A living individual in its life position in the sediment. Closed arrow represents the inhalant stream, open arrows the exhalant.
Figure 14 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 14. Paphies elongata. An interior view of the fused ventral mantle margin posterior to the pedal gape and showing the rejectory tract. This figure also illustrates the posterior adductor muscle and the visceral ganglia beneath it. AN, anus; AVG, accessory visceral ganglia; FIMF(2), fused inner mantle folds (outer component); IMF(1), inner mantle fold (inner component); IS, inhalant siphon; PA (1), posterior adductor muscle (anterior component); PA(2), posterior adductor muscle (posterior component); PGA, pedal gape; R, rectum; RT, rejectory tract; SN, siphonal nerve; SRM, siphonal retractor muscles; VG, visceral ganglia; VG-AVG-CONN, visceral ganglia-accessory visceral ganglia connective.
Figure 7. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 7. Paphies elongata. A transverse section through the right ventral mantle margin of the pedal gape. IMF(1), inner mantle fold (inner component); IMF(2), inner mantle fold (outer component); MMF, middle mantle fold; OMF, outer mantle fold; P, periostracum; PN, pallial nerve; PRM, pallial retractor muscle; RT, rejectory tract.
Figure 17 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 17. Paphies elongata. The organs of the pericardium as seen from the right side. AN, anus; AU, auricle; CA, ctenidial axis; DD, digestive diverticulae; G, gonad; GA, gonadial aperture; K, kidney; PA, posterior adductor muscle; PALID, point of attachment of the ascending lamella of the inner demibranch to the visceral mass; PALOD, point of attachment of the ascending lamella of the outer demibranch to the mantle; PG, pericardial gland; PPR, posterior pedal retractor muscle; PR, prodissoconch; R, rectum; RA, renal aperture; R-PA, reno-pericardial aperture; V, ventricle; VM, visceral mass.
Figure 10. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 10. Paphies elongata. A more detailed view of the ciliary currents of the ctenidium and the ctenidial-labial palp junction, as seen from the right side. AA(1), anterior adductor muscle(1); APR, anterior pedal retractor muscle; CA, ctenidial axis; ID, inner demibranch; ILP, inner labial palp; M, mouth; OD, outer demibranch; OLP, outer labial palp; PA, posterior adductor muscle; PALOD, point of attachment of the ascending lamella of the outer demibranch to the mantle; PPR, posterior pedal retractor muscle; SAE, supra-axial extension of the outer demibranch; VM, visceral mass; VMFG, ventral margin food groove of the inner demibranch.
Figure 6 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 6. Paphies elongata. (a) The siphons as seen from the posterior aspect. More detailed views from the lateral aspect of (b), the inhalant and (c) the exhalant siphons. (d) One of the eight largest inhalant siphonal tentacles shown in greater detail. ES, exhalant siphon; MMF, middle mantle fold; IS, inhalant siphon.
Figure 2 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 2. Paphies elongata. (a) Lateral and (b) posterior views of the left shell valve. Also illustrated in (c) and (d) are the same views of Donax columbella drawn to approximately the same scale. a–b, the dorsoventral axis of the shell; x–y, the greatest shell width; small arrow indicates the position of the umbones; the angles suggest that the posterior face of the shell of P. elongata is slightly more elongate than in D. columbella. L, ligament of D. columbella.
Figure 16 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 16. Paphies elongata. (a) A transverse section through the pedal ganglia showing the position of two putative statocysts. (b) A single putative statocyst illustrated in greater detail. C-P-CONN, cerebro-pleural-visceral ganglia-connective; PEG, pedal ganglia; PEN, pedal nerve; STA, statolith; STC, statocyst.
Figure 12 in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 12. Paphies elongata. The ciliary currents of the visceral mass as seen from the left side. AA (1), anterior adductor muscle(1); AA(2), anterior adductor muscle(2); APR, anterior pedal retractor muscle; DEF, dorsal extension of the foot; F, foot; HF, heel of the foot; PA, posterior adductor muscle; PPR, posterior pedal retractor muscle; PR, prodissoconch; PS, pallial sinus; VM, visceral mass.
Figure 8. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)
Figure 8. Paphies elongata. A transverse section through the fused ventral mantle margin posterior to the pedal gape. FIMF(2), fused inner mantle folds (outer component); FRT, fused rejectory tracts; IMF(1), inner mantle fold (inner component); MMF, middle mantle fold; OMF, outer mantle fold; P, periostracum; PRM, pallial retractor muscle; SC, secretory cells; TC, transverse connective.
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