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365 results for “Nereididae”
FIGURE 6 in Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean
FIGURE 6. Alitta dyamusi (Izuka, 1902) n. comb., epitoke male. Non-types (NSMT 5004-5010), Hokkaido, Japan. A. Anterior region, dorsal view. B. Pharynx, dorsal (left) and ventral (right) views. C. Right jaw, ventral (left) and dorsal (right) views (arrow pointing clustered longitudinal canals). D. Dorsal ligules of anterior natatory chaetigers, dorsolateral view. E. Posterior region with regenerating pygidium, dorsal view. F. Root of aciculae (set. 100). G. Articulation of a same sesquigomph spiniger, ventral (left) and anterior (right) views (set. 15). H. Ensiform chaeta (set. 100). I. Heterogomph spiniger (set. 15). J. Heterogomph falciger (set. 15). Scale bars: A, 5 mm; B, C, E, 2 mm; D, 5 mm; F, 0.5 mm; G–J, 20 µm.
FIGURE 3. Alitta brandti Malmgren, 1865 in Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean
FIGURE 3. Alitta brandti Malmgren, 1865, epitoke male. Holotype (ZINRAS 6/9181), southwestern Sea of Okhotsk, Russia. A–G. Parapodia, posterior (left) and anterior (right) views (numbers refer to the chaetiger); ventral cirri in F, dehiscent. H. Anterior segments with bulging ventral end (pointed by arrows). Arrowheads: E, black, points used for measuring entire length of ligule; white, same but for maximum width. F, white, distal and proximal ends of upper lobe of dorsal ligule. Arrows: C, black, superior lobe; white, inferior lobe. E, black, postchaetal lobe; white, prechaetal lobe; orange, distal elongation of upper lobe. Scale bars: A, 1 mm; B–H, 2 mm.
FIGURE 2. Alitta brandti Malmgren, 1865 in Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean
FIGURE 2. Alitta brandti Malmgren, 1865, epitoke male. Holotype (ZINRAS 6/9181), southwestern Sea of Okhotsk, Russia. A. Body, dorsal view (arrow pointing first natatory chaetiger). B. Anterior region, dorsal view. C. Left jaw, dorsal (left) and ventral (right) views. D. Pharynx, ventral view (roman numerals refer to pharyngeal areas; a, left; b, right). E. Pigmented dorsolateral surface of median parapodia, dorsal view. F. Root of aciculae (set. 60). G. Articulation of same sesquigomph spiniger, ventral (left) and anterior (right) views. H. Ensiform chaeta (set. 107). I. Heterogomph falciger (set. 7). J, K. Heterogomph spinigers (set. 35 and 15, respectively). Scale bars: A, 10 mm; B–D, 5 mm; E, 2 mm; F, 0.5 mm; G–K, 20 µm.
FIGURE 1 in Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean
FIGURE 1. Schematic diagrams and terminology of atokal and epitokal parapodial features in Alitta virens species complex; line drawings from medial parapodia in frontal view. Atoke parapodia: A. Lectotype of A. williami nom. nov. (NHMUK 1860.2.29.6). B. Lectotype of A. plenidentata n. comb. (CASIZ 14013). Epitoke parapodia: C. Holotype of A. brandti, male (ZINRAS 6/9181). D. Topotype of A. plenidentata n. comb., female (LACM-AHF Poly 9321). Ensiform chaetae omitted. Terminology based on Hylleberg et al. (1986) and Bakken & Wilson (2005), but with some adaptations.
FIGURE 5 in Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean
FIGURE 5. Alitta dyamusi (Izuka, 1902) n. comb., atoke specimen. Syntype (NSMT 6115-6119), Sakhalin Island, Russia. A– G. Parapodia, posterior (left) and anterior (right) views (numbers refer to the chaetiger); ventral ligule in B anomaly bifid. H. Medial segments, ventral view. Arrows: C, orange, superior lobe; white, inferior lobe. E, black, postchaetal lobe; white, prechaetal lobe. H, bulging ventral ends. Scale bars: A, G, 0.5 mm; B–F, 2 mm; H, 2 mm.
FIGURE 4 in Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean
FIGURE 4. Alitta dyamusi (Izuka, 1902) n. comb., atoke specimen. Syntype (NSMT 6115-6119), Sakhalin Island, Russia. A. Anterior region, dorsal view. B. Left jaw, dorsal (left) and ventral (right) views (arrow pointing clustered canals). C. Pharynx, ventral view (roman numerals refer to pharyngeal areas; a, left; b, right). D. Posterior parapodia, dorsolateral view. E. Posterior region, dorsal view. F. Root of aciculae (set. 62). G. Articulation of a same homogomph spiniger, ventral (left) and anterior (right) views (set. 25). H. Heterogomph spiniger (set. 25; inset: basal teeth). I. Heterogomph falciger (set. 25). Scale bars: A, 5 mm; B–D, 1 mm; E, 2 mm; F, 0.5 mm; G–I, 20 µm.
FIGURE 10 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 10. Pseudonereis variegata (Grube & Kröyer in Grube, 1858). Topotype A–B, I–J (USNM 176578); topotype C– H (USNM 176579). A, anterior end, dorsal view. B, posterior end, dorsal view. C, anterior end, dorsal view (insert: close-up of chaetigers 20–22). D, pharynx, dorsal view. E, same, ventral view. F, chaetiger 1, right parapodium. G, chaetiger 13, right parapodium. H, chaetiger 41, right parapodium. I, chaetiger 56, right parapodium. J, sub-acicular heterogomph falciger, chaetiger 56. Scale bars: A–C, 1 mm; D, E, 0.5 mm; F–I, 0.1 mm; J, 10 µm.
FIGURE 9. Pseudonereis gallapagensis Kinberg, 1865. Non-types A–B, E–K in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 9. Pseudonereis gallapagensis Kinberg, 1865. Non-types A–B, E–K (USNM 24265), non-type C–D (USNM 24266). A, anterior end, dorsal view. B, posterior end, dorsal view. C, pharynx, dorsal view. D, same, ventral view. E, subacicular heterogomph falcigers, chaetiger 12. F, supra-acicular heterogomph falciger, chaetiger 40. G, sub-acicular heterogomph falciger, chaetiger 40. H, chaetiger 2, right parapodium. I, chaetiger 12, right parapodium. J, chaetiger 30, right parapodium. K, chaetiger 73, right parapodium. Scale bars: A–D, 1 mm; E–G, 10 µm; H–K, 0.2 mm.
FIGURE 6 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 6. Pseudonereis brunnea sp. n. Holotype A–H (ECOSUR 0191); paratypes I–O (ECOSUR 0192). A, anterior end, dorsal view. B, posterior end, dorsal view. C, chaetiger 2, right parapodium. D, chaetiger 10, right parapodium. E, Chaetiger 26, right parapodium. F, chaetiger 46, right parapodium. G, chaetiger 65, right parapodium. H, close up of anterior end. I, maxillary ring, frontal view. J, oral ring, frontal view. K, supra-acicular heterogomph falciger, chaetiger 55. L, sub-acicular heterogomph falciger, chaetiger 55. M, sub-acicular heterogomph spiniger, chaetiger 55. N, notopodial homogomph spiniger, chaetiger 55. O, sub-acicular heterogomph spiniger, chaetiger 55. Black triangles= points used for length measurement. Scale bars: A, B, 1 mm; C–G, 0.2 mm; H–J, 0.5 mm; K–M, 10 µm; N, O, 30 µm.
FIGURE 5 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 5. Classification of some rectangular-base paragnaths. A, shield-shaped bars. B, crescent-shaped bars. C and D, pointed bars (P-bars). Drawings show the tip (dark brown) and base (light brown) of paragnaths, in both anterior and superior views; each drawing is accompanied with a picture of the same paragnath and at the same view. Green arrowheads point toward the anterior end of the body, showing the relative position of the paragnaths in relation to the pharynx axis. Blue vertical triangles point to the distal tip of the paragnaths; red triangles point the midpoint of the bases, and white dotted lines represent the bases' altitude lines. A, D, Pseudonereis brunnea sp. n. (ECOSUR P2926); B, Perinereis floridana (ECOSUR P1100); C, Nereis garwoodi (ECOSUR P2831).
FIGURE 3 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 3. Transversal distribution of paragnaths in the furrow and ridge regions. A, Alitta succinea (ECOSUR P2729), five rows in two bands. B, distances among rows in region A of A. succinea, showing the gap between the bands. C, Nereis garwoodi (ECOSUR P2831), two rows in two bands. D, distances among rows in region A of N. garwoodi, showing the gap between the bands. E, Hediste cf. diversicolor (USNM 58131), three rows in two bands. F, distances among rows in region Br of H. cf. diversicolor, showing the gap between the bands. G, Perinereis floridana (ECOSUR P1100), three rows in two bands. H, distances among rows in region A of P. floridana, showing the gap between the bands. I, Pseudonereis gallapagensis (USNM 24266), two rows and one band. J. Platynereis magalhaensis (ECOSUR P2935), two rows and one band.
FIGURE 8 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 8. Pseudonereis fauveli sp. n. Holotype A–M (USNM 1494007). A, anterior end, dorsal view. B, posterior end, dorsal view. C, chaetiger 2, right parapodium. D, chaetiger 13, right parapodium. E, chaetiger 32, right parapodium. F, chaetiger 50, right parapodium. G, chaetiger 67, right parapodium. H, right jaw in lateral (left) and dorsal (right) view. I, supraacicular homogomph spiniger, chaetiger 13. J, supra-acicular heterogomph falciger, chaetiger 13. K, sub-acicular heterogomph falciger, chaetiger 13. L, supra-acicular heterogomph falciger, chaetiger 67. M, sub-acicular heterogomph falciger, chaetiger 67. Scale bars: A, 1 mm; B–H, 0.2 mm; I–M, 10 µm.
FIGURE 2 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 2. The midventral pharynx area in some nereidid genera. A, midventral area in Alitta succinea (ECOSUR P2729). B, midventral area in Pseudonereis gallapagensis (USNM 24266). C, midventral area in Nereis garwoodi (ECOSUR P2831). D, midventral area in Perinereis floridana (ECOSUR P1100). E, midventral area in Hediste cf. diversicolor (USNM 58131). F, midventral area in Kainonereis polaris (USNM 55514). G, midventral area in Platynereis magalhaensis (ECOSUR P2935). A– B and E–F show pharynges fully everted; C–D show pharynges partially everted; G shows a pharynx dorsally dissected. The midventral area in all drawings is highlighted in white.
FIGURE 7 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 7. Pseudonereis citrina sp. n. Holotype A–C, F–P (ECOSUR 0194); paratypes D (ECOSUR 0195) and E (ECOSUR 0196). A, anterior end, dorsal view. B, posterior end, dorsal view (insert: close-up of glandular masses in notopodial ligules). C, left jaw, dorsal view. D and E, pharynx areas V and VI. F, chaetiger 2, right parapodium. G, chaetiger 10, right parapodium. H, chaetiger 24, right parapodium. I, chaetiger 38, right parapodium. J, chaetiger 56, right parapodium. K, sub-acicular heterogomph spiniger, chaetiger 56. L, supra-acicular heterogomph falciger, chaetiger 56. M, sub-acicular heterogomph falciger, chaetiger 56. N, sub-acicular heterogomph falciger, chaetiger 38. O, notopodial homogomph spiniger, chaetiger 38. P, sub-acicular heterogomph spiniger, chaetiger 56. Scale bars: A, B, 1 mm; C, 0.3mm; D, E, 0.1 mm; F–J, 0.2 mm; K–N, 10 µm; O, P, 30 µm.
FIGURE 1 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 1. Proposal of division of pharyngeal midventral area. A, Kinberg's drawings of ventral pharynx of Perinereis novaehollandiae (9C.) and Mastigonereis spinosa (10C.), showing the area VII and VIII as originally was intended; gray areas are intended to highlight midventral area in white. B, midventral area, composed of the areas III, VII and four subareas of area VIII; areas VII and VIII subdivided in furrow (lowercase letters) and ridge (uppercase letters) regions from both left (suffix l) and right (suffix r). A redrawn from Kinberg (1910).
FIGURE 4 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 4. Longitudinal distribution of paragnaths in the furrow and ridge regions. A, Neanthes cf. acuminata (ECOSUR P2936), showing the longitudinal alignment of paragnaths. B, same, diagram of the distribution of paragnaths in a pharynx fully everted. C, Nereis pelagica (ECOSUR P2840), showing the irregular distribution of paragnaths. D, same, diagram showing the paragnaths longitudinally aligned, paragnaths of the same color belong to the same longitudinal row. E, same, diagram showing longitudinal rows obtained when connecting the dots (paragnaths) of the same row.
FIGURE 11 in New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology
FIGURE 11. Paragnaths arrangement in Perinereis cariboea de León-González & Solís-Weiss, 1998. A, dissected pharynx of the holotype (USNM 180694). B, pharynx of non-type specimen (ECOSUR 2934), ventral view. C, pharynx partially everted of non-type specimen (ECOSUR 2933), ventral view; arrows point to the paragnaths of the second band. Scale bars: A, 0.1 mm; B, C, 0.5 mm.
FIGURE 3 in Re-evaluation of the morphology of the monotypic genera Lycastonereis Rao, 1981 and Ganganereis Misra, 1999 (Annelida, Phyllodocida, Nereididae)
FIGURE 3. Paraleonnates sootai (Misra, 1999) n. comb. A, anterior end, dorsal view. B, pharynx, dorsal view. C, pharynx, ventral view. D, chaetiger 2, left parapodium, anterior view. E, chaetiger 5, left parapodium, anterior view. F, chaetiger 5, right parapodium, posterior view. G, chaetiger 120, left parapodium, anterior view. H, notopodial homogomph spiniger. I, subacicular heterogomph spiniger. J, supra-acicular sesquigomph spiniger. Scale bars: A–C, 1 mm; D–G, 0.25 mm; H–J, 10 µm. (Redrawn from Misra 1999, Figs. 9 and 10; A, D–J from holotype, B–C from paratype). Abbreviations: Dc, dorsal cirrus; InL, inferior lobe (neuroacicular ligule); LDc, lobe above dorsal cirrus; Mr, maxillary ring; NeV, neuropodial ventral ligule; NoD, notopodial dorsal ligule; NoV, notopodial ventral ligule; Or, oral ring; PoL, neuropodial postchaetal lobe; SpL, superior lobe (neuroacicular ligule); Vc, ventral cirrus.
FIGURE 2. Lycastonereis indica Rao, 1981. Non-type specimens A–J in Re-evaluation of the morphology of the monotypic genera Lycastonereis Rao, 1981 and Ganganereis Misra, 1999 (Annelida, Phyllodocida, Nereididae)
FIGURE 2. Lycastonereis indica Rao, 1981. Non-type specimens A–J (USNM 62013). A, anterior end, dorsal view. B, anterior end, dorsal view. C, pharynx, dorsal view (An: antennae; Roman numerals represent pharyngeal areas). D, anterior end, lateral view (Roman numerals represent pharyngeal areas). E, sub-acicular sesquigomph falciger, chaetiger 41. F, subacicular homogomph spiniger, chaetiger 41. G, chaetiger 1, right parapodium. H, chaetiger 3, right parapodium (neuropodial ventral ligule overlapped). I, chaetiger 18, right parapodium. J, chaetiger 41, right parapodium. Scale bars: A–B, 1 mm; C–D, 0.2 mm; E–F, 10 µm; G–J, 0.1 mm.
FIGURE 7. Nectoneanthes c.f. uchiwa Sato, 2013 in First records of Composetia, Eunereis and Nectoneanthes (Annelida: Nereididae) from Taiwan, with descriptions of two new species
FIGURE 7. Nectoneanthes c.f. uchiwa Sato, 2013; A, B, E, F (NMNS 7898-013); C, D (NMNS 7898-014); G, H (NMNS 7898-008). A, eversible pharynx, dorsal view; B, eversible pharynx, ventral view; C, eversible pharynx, dorsal view; D, eversible pharynx, ventral view; E, right parapodium, chaetiger 9, anterior view; F, right parapodium, chaetiger 9, anterior view; G, left parapodium, chaetiger 14, posterior view; H, left parapodium, chaetiger 33, anterior view. Abbreviations: DC, dorsal cirrus; IL, inferior lobe; NePL, neuropodial postchaetal lobe; NeVL, neuropodial ventral ligule; NoDL, notopodial dorsal ligule; NoPL, notopodial prechaetal lobe; NoVL, notopodial ventral ligule; OL, ovoid lobe; SL, superior lobe; VC, ventral cirrus. Roman numeric numbers: Areas of the pharynx. Scale: A–D, 1.0 mm; E–H, 0.5 mm.
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