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Fig. 5 in Reinstatement of Perinereis bairdii (Webster, 1884) and description of P. websteri sp. nov. from Bermuda, including the reproductive morphology of two Atlantic Perinereis species (Annelida: Errantia: Phyllodocida)

Fig. 5. Perinereis bairdii (Webster, 1884). Topotype male (USNM 1480197). A. Whole specimen, dorsal view. B. Anterior end, dorsal view. C. Same, lateral view. D. Posterior end, dorsal view. E. Pharynx dissected, ventral view. Scale bars: A–B = 1 mm; C = 0.5 mm; E = 0.2 mm.

Fig. 4 in Reinstatement of Perinereis bairdii (Webster, 1884) and description of P. websteri sp. nov. from Bermuda, including the reproductive morphology of two Atlantic Perinereis species (Annelida: Errantia: Phyllodocida)

Fig. 4. Perinereis bairdii (Webster, 1884). Topotypes (USNM 1480190). A. Anterior end, dorsal view. B. Posterior end, dorsal view. C. Supra-acicular heterogomph falciger, chaetiger 59. D. Sub-acicular heterogomph falcigers, chaetiger 59. E. Right jaw, dorsal view. F. Chaetiger 1, left parapodium. G. Chaetiger 10, left parapodium. H. Chaetiger 21, left parapodium. I. Chaetiger 41, left parapodium. J. Chaetiger 59, left parapodium. K. Chaetiger 72, left parapodium. Scale bars: A–B = 0.5 mm; C–D = 10 μm; E = 0.25 mm; F–K = 0.2 mm.

Fig. 3 in Reinstatement of Perinereis bairdii (Webster, 1884) and description of P. websteri sp. nov. from Bermuda, including the reproductive morphology of two Atlantic Perinereis species (Annelida: Errantia: Phyllodocida)

Fig. 3. Perinereis bairdii (Webster, 1884). A–C, G–J. Lectotype of Nereis bairdii (USNM 4786). D–F. Paralectotypes (USNM 1660576). A. Anterior end, dorsal view. B. Posterior end, dorsal view. C. Pharynx, ventral view. D. Left jaw, dorsal view. E. Pharynx, ventral view. F. Pharynx, lateral view. G. Chaetiger 2, right parapodium. H. Chaetiger 11, right parapodium. I. Chaetiger 34, right parapodium. J. Chaetiger 57, right parapodium. Scale bars: A–C, E–F = 0.5 mm; D, G–J = 0.1 mm.

Fig. 2. Perinereis anderssoni Kinberg, 1865 in Reinstatement of Perinereis bairdii (Webster, 1884) and description of P. websteri sp. nov. from Bermuda, including the reproductive morphology of two Atlantic Perinereis species (Annelida: Errantia: Phyllodocida)

Fig. 2. Perinereis anderssoni Kinberg, 1865. Topotype (ECOSUR P3208). A. Anterior end, dorsal view. B. Posterior end, dorsal view. C. Posterodorsal tentacular cirri. D. Left jaw, dorsal view. E. Chaetiger 1, right parapodium. F. Chaetiger 10, right parapodium. G. Chaetiger 28, right parapodium. H. Chaetiger 45, right parapodium. I. Chaetiger 62, right parapodium. J. Supra-acicular heterogomph falciger, chaetiger 62. K. Sub-acicular heterogomph falciger, chaetiger 28. Scale bars: A–C = 1 mm; D = 0.25 mm; E–I = 0.1 mm; J–K = 10 μm.

Fig. 1 in Reinstatement of Perinereis bairdii (Webster, 1884) and description of P. websteri sp. nov. from Bermuda, including the reproductive morphology of two Atlantic Perinereis species (Annelida: Errantia: Phyllodocida)

Fig. 1. Parapodial morphology of species of Perinereis Kinberg, 1865 and points used to obtain segments and length ratios of parapodial structures described in this work. Arrows and labels correspond to points used for the measuring parapodial structures as described in Material and methods section. A. Parapodium from posterior chaetiger of Perinereis floridana (Ehlers, 1868) (ECOSUR P1100). B. Parapodium from natatory region of Perinereis floridana (LACM-AHF 7376). Abbreviations: Dc = dorsal cirrus; DDoL = distal lobe of dorsal ligule; DoL = dorsal ligule; LDc = lower lamella of dorsal cirrus; LoM = lower lamella of median ligule; LVc = lower lamella of ventral cirrus; MeL = median ligule; NeL = neuroacicular ligule; PDoL = proximal lobe of dorsal ligule; PoL = neuropodial postchaetal lobe; PreL = notopodial prechaetal lobe; UDc = upper lamella of dorsal cirrus; UVc = upper lamella of ventral cirrus; Vc = ventral cirrus; VeL = ventral ligule; VeLa = ventral lamella.

FIG. 4. — Nereiphylla etiennei n in New species of hesionid and phyllodocid polychaetes (Annelida, Errantia) from Clipperton Island

FIG. 4. — Nereiphylla etiennei n. sp.: A, holotype (MNHN-IA-TYPE2044), anterior region, dorsal view; B, paratype (MNHN-IA-TYPE2045), anterior region, right lateral view; C, paratype (ECOSUR 277), posterior chaetiger, posterior view; D, same, posterior region, dorsal view. Scale bars: A, B, D, 0.1 mm; C, 30 µm.

FIG. 6. — Pterocirrus bouchardi n in New species of hesionid and phyllodocid polychaetes (Annelida, Errantia) from Clipperton Island

FIG. 6. — Pterocirrus bouchardi n. sp., paratypes: A, juvenile paratype (ECOSUR 278), without posterior region; B, same, anterior region, oblique dorsal view; C, same, oblique ventral view; D, largest paratype (MNHN), mature female, anterior region, dorsal view (tentacular and parapodial cirri lost); E, same, median chaetiger, left parapodium, anterior view with many oocytes (after Methyl green). Scale bars: A, 0.6 mm; B, C, D, 0.3 mm; E, 60 µm.

FIG. 5. — Pterocirrus bouchardi n in New species of hesionid and phyllodocid polychaetes (Annelida, Errantia) from Clipperton Island

FIG. 5. — Pterocirrus bouchardi n. sp., holotype (MNHN-IA-TYPE2046): A, complete, dorsal view; B, anterior region, dorsal view; C, median chaetiger, right parapodium, without dorsal cirrus, posterior view (after Methyl green); D, posterior chaetiger, right parapodium, dorsal cirrus bent posteriorly, posterior view (after Methyl green); E, posterior region. Scale bars: A, 0.6 mm; B, 0.3 mm; C, D: 0.1 mm; E, 0.2 mm.

FIG. 3. — Anaitides albengai n in New species of hesionid and phyllodocid polychaetes (Annelida, Errantia) from Clipperton Island

FIG. 3. — Anaitides albengai n. sp., paratypes (ECOSUR 276, Sta. 26): A, shorter paratype, anterior end, oblique frontal view, pharynx partially exposed by fracture of body wall; B, same, chaetiger 33, right parapodium, posterior view (after Shirlastain-A, asterisk indicates area to be enlarged); C, same, close-up of ciliary band; D, same, chaetiger 73, right parapodium, posterior view (asterisk indicates area to be enlarged); E, same, close-up of ciliary band; F, longer paratype, anterior end and pharynx, left lateral view (left antenna lost; asterisk indicates nuchal organ). Scale bars: A, B, 0.3 mm; C, D, 0.1 mm; E, 20 µm; F, 0.2 mm.

FIG. 2. — Anaitides albengai n in New species of hesionid and phyllodocid polychaetes (Annelida, Errantia) from Clipperton Island

FIG. 2. — Anaitides albengai n. sp., holotype (MNHN-IA-TYPE2041): A, oblique lateral view of anterior region; B, anterior region, dorsal view (after Shirlastain-A); C, same, oblique lateral view; D, pharynx, anterior end, frontal view; E, chaetiger 50, left parapodium, anterior view (after Methyl green); F, chaetiger 120, left parapodium, anterior view (after Methyl green staining); G, chaetiger 220, right parapodium, anterior view (after Methyl green). Scale bars: A, 0.8 mm; B, 0.5 mm; C, E, 0.3 mm; D, 0.4 mm; F, G, 0.2 mm.

FIG. 1. — Psamathe charpyi n in New species of hesionid and phyllodocid polychaetes (Annelida, Errantia) from Clipperton Island

FIG. 1. — Psamathe charpyi n. sp., holotype (MNHN-IA-TYPE2040); A, anterior region, dorsal view (after Shirlastain-A); B, same, anterior end, dorsal view; C, same, ventral view; D, chaetiger 14, right parapodium, anterior view (insets: neurochaetal blades). Scale bars: A, 0.36 mm; B, 0.25 mm; C, 0.20 mm; D, 0.10 mm.

Fig. 2 Tomopteris pacifica. Neurogenesis. Confocal maximum projections. A in Development and structure of the anterior nervous system and sense organs in the holopelagic annelid Tomopteris spp. (Phyllodocida, Errantia)

Fig. 2 Tomopteris pacifica. Neurogenesis. Confocal maximum projections. A Early developmental stages are characterized by a large amount of yolk and a prominent prototroch (pt). B At 5 days post-fertilization (dpf), the larval stages possess four pairs of well-developed trunk appendages and a distinct prototroch (pt). Note that the anterior-most appendage (I) is uniramous while all other appendages appear biramous. C Slightly older stages show a well-developed ventral nerve cord (vnc) with outgoing parapodial neurite bundles (pn) innervating the body appendages; serotonergic somata form serial clusters along the ventral nerve cord. D A closer examination of larvae at around 6–7 dpf shows the presence of a prominent nuchal nerve (nn) innervating the nuchal organs and originating from the dorsal part of the larval brain (br). The insert shows the innervation of the nuchal organ.

Fig. 9 in Development and structure of the anterior nervous system and sense organs in the holopelagic annelid Tomopteris spp. (Phyllodocida, Errantia)

Fig. 9 Tomopteris helgolandica. Nuchal organ, details of receptor cells, juvenile, TEM. A Outer part of the olfactory chamber (oc), showing that the epithelium is primarily formed by monociliary sensory dendrites (sd), some with basal bodies (arrows). The olfactory chamber has numerous sensory processes (spr), and vesicle-like structures appearing empty (asterisks). The apical region of dendrites often contains dense cored (arrowheads) and other vesicles. B Sensory dendrite (sd) with very short sensory cilium and shaft branches into microvillus-like structures (arrowhead). C Sensory dendrite sending out a microvillus

Fig.1 Tomopteris pacifica. Developmental stages. SEM images. A in Development and structure of the anterior nervous system and sense organs in the holopelagic annelid Tomopteris spp. (Phyllodocida, Errantia)

Fig.1 Tomopteris pacifica. Developmental stages. SEM images. A Spherical trochophore ca. 48–72-h post-fertilization. B Elongated embryo at ca. 5 days post-fertilization (dpf) with four segments and rudiments of parapodia, Roman numerals refer to segment numbers. C Dorsal view of larva/juvenile at 6–7 dpf showing parapodia formation; note first cirruslike appendage. Nuchal organs (no) visible as cilia semicircles in front of the prototroch (pt). D Ventral view of larva/juvenile at ca. 8–10 dpf. E

Fig. 5 in Development and structure of the anterior nervous system and sense organs in the holopelagic annelid Tomopteris spp. (Phyllodocida, Errantia)

Fig. 5 Tomopteris helgolandica. Tentacular cirrus of juvenile. TEM. A Longitudinal section of the intracellular skeletal element (se) with regular cross striation pattern. B Skeletal element, periodicity, and substructure of the striation pattern. C Process of rod-bearing cells reaching the epithelial surface of the epidermis (arrow). D Gland cell opening at the base of cirrus with a circle of microvilli (arrow). E Group of distal gland cell processes close to opening at the base of cirrus. F Central part of the cirrus formed by numerous neurites cov-

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Linked collectors and determiners for: Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae).

Natural history specimen data linked to collectors and determiners held within, "Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/6c3d39df-7484-4878-8952-9c6a0d926465">https://bionomia.net/dataset/6c3d39df-7484-4878-8952-9c6a0d926465</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/6c3d39df-7484-4878-8952-9c6a0d926465">https://gbif.org/dataset/6c3d39df-7484-4878-8952-9c6a0d926465</a>. Formatted as a Frictionless Data package.

Fig. 4. Neanthes helenae Kinberg, 1865. A–C, I–P in Redescriptions of Neanthes Kinberg, 1865 (Annelida: Errantia: Nereididae) species from worldwide regions

Fig. 4. Neanthes helenae Kinberg, 1865. A–C, I–P. Holotype of Nereis (Neanthes) nanciae Day, 1949 (NHMUK 1950.1.5.72-95) from Jamestown, St Helena Island, atokous. A. Entire body in dorsal view. B. Anterior end in dorsal view.C. Anterior region in ventral view, arrow indicates ventrolateral projection. I. Left parapodium from chaetiger 1 in posterior view. J. Left parapodium from chaetiger 7 in posterior view. K. Right parapodium from chaetiger 21 in anterior view. L. Left parapodium from chaetiger 30 in posterior view with ventral cirri contracted and hidden behind the neuroacicular ligule. M. Right parapodium from chaetiger 60 in anterior view. N. Heterogomph fused falciger from supracicular neurochaetae (chaetiger 30). O. Heterogomph falciger from subacicular neurochaetae (chaetiger 7). P. Heterogomph falciger from subacicular neurochaetae (chaetiger 30). — D–H, Q. Paratype of Nereis (Neanthes) nanciae Day, 1949 (NHMUK 1950.1.5.72-95) from Jamestown, St Helena Island, atokous. D. Anterior region in lateral view, arrow indicates ventrolateral projection. E. Left jaw in dorsal and ventral views, respectively. F. Inner canals of jaws in ventral view. G. Non-everted pharynx in ventral view. H. Area VI of oral ring of non-everted pharynx in ventral view, arrows indicate p-bars. Q. Posterior end in dorsal view. Roman numerals refer to the areas and Arabic numbers to chaetigers. Scale bars: A–C, Q = 1 mm; D–E, G = 0.5 mm; F, J–L = 0.2 mm; H–I, M = 0.1 mm; N–P = 20 µm.

Fig. 5 in Redescriptions of Neanthes Kinberg, 1865 (Annelida: Errantia: Nereididae) species from worldwide regions

Fig. 5. Neanthes mossambica (Day, 1957). Holotype (NHMUK 1961.16.22) from Morrumbene, Mozambique, atokous female. A. Entire body in dorsal view. B. Anterior end in dorsal view. C. Noneverted pharynx in ventral view (arrow indicates p-bar). D. Area VI of non-everted pharynx in ventral view (arrow pointing anteriorly). E. Left parapodium from chaetiger 1 in posterior view. F. Right parapodium from chaetiger 9 in anterior view. G. Left parapodium from chaetiger 21 in posterior view. H. Right parapodium from chaetiger 40 in anterior view. I. Right parapodium from chaetiger 63 in anterior view with ventral cirri contracted and hidden behind the neuroacicular ligule. J. Homogomph spiniger from notochaetae (chaetiger 9). K. Heterogomph spiniger from subacicular neurochaetae (chaetiger 9). L. Heterogomph falciger from supracicular neurochaetae (chaetiger 9). M. Heterogomph falciger from subacicular neurochaetae (chaetiger 9). Roman numerals refer to the areas and Arabic numbers to chaetigers. Scale bars: A = 2 mm; B = 1 mm; C = 0.5 mm; D = 0.1 mm; E–I = 0.2 mm; J–M = 20 µm.

Fig. 1 in Redescriptions of Neanthes Kinberg, 1865 (Annelida: Errantia: Nereididae) species from worldwide regions

Fig. 1. Neanthes chilkaensis (Southern, 1921). Lectotype (NHMUK 1938.5.7.27) from Chilika Lake, Orissa, India, atokous. A. Entire body in dorsal view (inset: approach of pygidium). B. Anterior end in dorsal view. C. Non-everted pharynx in ventral view. D. Dorsum of oral ring of non-everted pharynx in ventral view. E. Left parapodium from chaetiger 2 in posterior view. F. Left parapodium from chaetiger 13 in posterior view. G. Right parapodium from chaetiger 26 in anterior view. H. Right parapodium from chaetiger 38 in anterior view with ventral cirri contracted and hidden behind the neuroacicular ligule. I. Parapodium from chaetiger 52 in anterior view. J. Homogomph spiniger from notochaetae (chaetiger 13). K. Homogomph spiniger from supracicular neurochaetae (chaetiger 13). L. Heterogomph spiniger from subacicular neurochaetae (chaetiger 2). M. Heterogomph falciger from subacicular neurochaetae (chaetiger 13). Roman numerals refer to the areas and Arabic numbers to chaetigers. Scale bars: A = 3 mm; B = 1 mm; C = 0.5 mm; D–I = 0.2 mm; J–M = 20 µm.

Fig. 3. Neanthes helenae Kinberg, 1865. A–B, E–Q in Redescriptions of Neanthes Kinberg, 1865 (Annelida: Errantia: Nereididae) species from worldwide regions

Fig. 3. Neanthes helenae Kinberg, 1865. A–B, E–Q. Complete syntype (SMNH Type-457) from Jamestown, St Helena Island, atokous. C–D. Incomplete syntype (SMNH Type-457) from Jamestown, St Helena Island, atokous. A. Entire body in dorsal view. B. Anterior end in dorsal view. C. Everted pharynx in dorsal view. D. Everted pharynx in ventral view. E. Right parapodium from chaetiger 1 in anterior view with ventral cirri missing. F. Right parapodium from chaetiger 8 in anterior view. G. Right parapodium from chaetiger 27 in anterior view. H. Right parapodium from chaetiger 42 in anterior view with ventral cirri missing. I. Right parapodium from chaetiger 60 in anterior view. J. Homogomph spiniger from notochaetae (chaetiger 27). K. Heterogomph spiniger from subacicular neurochaetae (chaetiger 1). L. Heterogomph falciger from subacicular neurochaetae (chaetiger 1). M. Heterogomph, fused falciger from supracicular neurochaetae (chaetiger 42). N. Heterogomph falciger from supracicular neurochaetae (chaetiger 60). O. Heterogomph falciger from subacicular neurochaetae (chaetiger 13). P. Heterogomph falciger from subacicular neurochaetae (chaetiger 60). Q. Posterior end in dorsal view. A–D, Q: stained with Shirlastain A. Roman numerals refer to the areas and Arabic numbers to chaetigers. Scale bars: A–B = 1 mm; C–D, Q = 0.5 mm; E–I = 0.1 mm; J–P = 20 µm.