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48 results for “spionids”
Figure 4. Scolelepis juvenile and adult morphology. A, S in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 4. Scolelepis juvenile and adult morphology. A, S. goodbodyi, anterior end of a 40-chaetiger juvenile, leħ lateral view, showing pointed peristomial process basally enveloped by prostomium in a tube-like manner; arrow ring indicates directions of encasement that occurred during individual seưlement and metamorphosis. B, S. goodbodyi, anterior end of a 60-chaetiger adult, leħ frontolateral view. C, S. aff. squamata, anterior end, dorsal view, both palps regenerating. D, same, leħ lateral view. E, S. cf. texana, anterior end, ventral view, showing small mouth bordered laterally by two lateral peristomial lips and ventrally by anterior extensions of segments 1 and 2. F, same, leħ lateral view, palps missing. Abbreviations: la, ciliated lateral organ; lp, lateral peristomial lip; nt, nototroch; nu, nuchal organ; pp, pointed peristomial process; pr, prostomium; sh, basal sheath on palp; s1, segment 1; s2, segment 2; arrows show boundary between the pointed peristomial process and the prostomium. Scale bars: A, B, D, 50 µm; C, E, F, 100 µm. A, B, São Sebastião, São Paulo, Brazil (MZUSP 251). C–F, Carrie Bow Cay, Caribbean Sea, Belize.
Figure 3. Scolelepis metamorphosis. A in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 3. Scolelepis metamorphosis. A, anterior end of a 25-chaetiger larva, pressed dorso-ventrally, showing two median peristomial processes situated in line below the conical prostomium, ventrolateral view. B, same, showing cilia tuħ retracted by fibres inside the medioventral peristomial process. C, anterior end of a 26-chaetiger larva, ventral view, showing cilia tuħ protruding outside the medioventral peristomial process. D, anterior end of a 32-chaetiger larva, ventral view, showing solid medioventral peristomial process without fibres inside. E, same, leħ lateral view. F, anterior end of a 38-chaetiger male, dorsal view. Abbreviations: bo, boss with non-motile cilia within the patch of motile nuchal cilia; ci, cilia tuħ; fi, internal fibres; lp, lateral peristomial lip; pa, palp; ph, palpophore; pp, medioventral peristomial process; pr, prostomium; pt, prototroch; vp, ventral peristomial lip; arrows show boundary between the pointed peristomial rostrum and the prostomium. Scale bars: A, C–F, 20 µm; B, 10 µm. A–F, S. goodbodyi, São Sebastião, São Paulo, Brazil.
Figure 2. Scolelepis larval morphology. A, 25 in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 2. Scolelepis larval morphology. A, 25-chaetiger larva of Scolelepis sp., leħ lateral view. B, anterior end, leħ lateral view. C, D, same, dorsal view. E, same, ventral view. F, same, fronto-ventral view. Abbreviations: br, provisional serrated bristles; ca, caruncle; cp, ciliated pit; ga, gastrotrochs; lp, lateral peristomial lip; mo, mouth; ne, neurotroch; nu, nuchal organ; pa, palp; pp, medioventral peristomial process; pr, prostomium; pt, prototroch, py, pygidium; te, telotroch. Scale bars: A, C, E, F, 100 µm; B, D, 50 µm. A–F, Carrie Bow Cay, Belize, Caribbean Sea (USNM 1459502).
Figure 7 in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 7. Schematic presentation of head composition in Spionidae. A–E, Scolelepis sp.: A, 2-chaetiger larva; B, 3-chaetiger larva; C; developed 25-chaetiger larva; D, newly seưled juvenile; E, adult. F, Polydora sp. 3-chaetiger larva. G, Polydora sp. developed larva. H, Spio sp. adult. I, Polydora sp. adult. J, Aonides sp. adult. All objects in ventral view. Lateral peristomial lips of larvae and derivatives of these larval lips in adults are marked with grey.
Figure 10. Spionidae head composition. A, B in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 10. Spionidae head composition. A, B, Paraprionospio sp., anterior ends, leħ lateral view. C, Aonides mayaguezensis Foster 1969, anterior end, ventral view. D, same, leħ lateral view, palps missing. E, F, Poecilochaetus trilobatus Imajima 1989, anterior end, fronto-ventral view, palps missing. Abbreviations: do, dorsal ciliated fold; lp, lateral peristomial lip; pa, palp; pr, prostomium; sh, basal sheath on palp; s1, s2, segments 1, 2; tu, prostomial tubercle; vp, ventral peristomial lip. Scale bars: A, B, E, F, 100 µm; C, D, 50 µm. A, B, North Carolina, USA (USNM 64109). C, D, Carrie Bow Cay, Caribbean Sea, Belize (USNM 1459211). E, F, Peter the Great Bay, Sea of Japan, Russia (USNM 1022171).
Figure 6. Scolelepis larval morphology. A, B, 25 in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 6. Scolelepis larval morphology. A, B, 25-chaetiger larva of Scolelepis sp., anterior chaetigers, leħ ventrolateral view. Abbreviations: br, provisional serrated bristles; ca, caruncle; la, ciliated lateral organ; ne, neuropodial postchaetal lamella; no, notopodial postchaetal lamella; nu, nuchal organ; pa, palp; ph, palpophore; pt, prototroch; s1, s2, segments 1, 2. Scale bars: A, B, 50 µm. A, B, Carrie Bow Cay, Belize, Caribbean Sea (USNM 1459502).
Figure 9. Spionidae head composition. A in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)
Figure 9. Spionidae head composition. A, Microspio microcera (Dorsey 1977), anterior end, ventral view. B, same, leħ lateral view, palps missing. C, Boccardia sp., anterior end, ventral view. D, Boccardia perata (Chlebovitsch 1959), anterior end, ventral view. E, Polydora rickettsi, anterior end, ventral view. F, Polydora ecuadoriana Blake 1983, leħ lateral view, palps missing. Abbreviations: do, dorsal ciliated fold; lp, lateral peristomial lip; pa, palp scar; pr, prostomium; s1, segment 1; vp, ventral peristomial lip. Scale bars: A, B, 50 µm; C, D, 200 µm; E, F, 100 µm. A, B, Carrie Bow Cay, Caribbean Sea, Belize (USNM 1459275). C, Rashua Is., Middle Kuriles, Russia (MIMB). D, Shikotan Is., South Kurile Is., Russia (USNM 183472). E, Coquimbo, Tongoy Bay, Chile (SMF 13491). F, Paranaguá Bay, Paraná, Brazil (USNM 1022185).
FIGURE 1 in Two new species of spionids from the genera Apoprionospio Foster, 1969 and Prionospio Malmgren, 1867 (Annelida: Spionidae) from the Colombian Caribbean
FIGURE 1. World distribution of the Prionospio species with five pairs of branchiae.
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