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Fig. 13 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. 13. Arrangement of paragnaths in the ridge and furrow regions of areas VII–VIII in species of Perinereis Kinberg, 1865. Filled figures with solid edges represent paragnaths observed in all specimens examined, no-filled figures with dashed edges represent paragnaths observed in some specimens only.
Fig. 12 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. 12. Perinereis cariboea De León-González & Solís-Weiss, 1998. Non-types (ECOSUR P3209). A. Whole specimen, dorsal view. B. Anterior end, dorsal view. C. Anterior end, dorsal view. D. Same, ventral view. E. Chaetiger 2, right parapodium. F. Chaetiger 6, right parapodium. G. Chaetiger 12, right parapodium. H. Chaetiger 14, right parapodium. I. Chaetiger 18, right parapodium. J. Chaetiger 35, right parapodium in anterior (left) and posterior (right) views. Scale bars: A = 5 mm; B–D = 1 mm; E = 0.25 mm; F–J = 0.5 mm.
Fig. 11 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. 11. Perinereis floridana (Ehlers, 1868). Non-types (ECOSUR P1100). A. Anterior end, dorsal view. B. Posterior end, dorsal view. C. Chaetiger 2, right parapodium. D. Chaetiger 10, right parapodium. E. Chaetiger 28, right parapodium. F. Chaetiger 61, right parapodium. G. Chaetiger 91, right parapodium. H. Left jaw, dorsal view. I. Supra-acicular heterogomph falciger, chaetiger 61. J. Subacicular heterogomph falciger, chaetiger 61. K. Sub-acicular heterogomph spiniger, chaetiger 61. L. Supra-acicular homogomph spiniger, chaetiger 61. Scale bars: A–B = 1 mm; C–H = 0.25 mm; I–J = 10 μm; K–L = 50 μm.
Fig. 10 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. 10. Perinereis floridana (Ehlers, 1868). Syntypes of Nereis floridana (MCZ ANNa-119). A. Whole specimen, dorsal view. B. Anterior end, dorsal view. C. Pharynx, dorsal view. D. Pharynx, ventral view. E. Supra-acicular heterogomph falciger, chaetiger 6. F. Supra-acicular heterogomph falciger, chaetiger 17. G. Sub-acicular heterogomph falciger, chaetiger 6. H. Sub-acicular heterogomph falciger, chaetiger 17. I. Chaetiger 2, right parapodium. J. Chaetiger 6, right parapodium. K. Chaetiger 10, right parapodium. L. Chaetiger 17, right parapodium. M. Chaetiger 18, right parapodium. N. Chaetiger 40, right parapodium. O. Chaetiger 95, right parapodium. Scale bars: A = 2 mm; B = 1 mm; C–D = 0.5 mm; E–H = 10 μm; I–O = 0.2 mm.
Fig. 9 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. 9. Perinereis websteri sp. nov. A–G, I–N. Holotype (USNM 1490807). H. Paratype (USNM 1490809). A. Chaetiger 2, right parapodium. B. Chaetiger 10, right parapodium. C. Chaetiger 31, right parapodium. D. Chaetiger 50, right parapodium. E. Chaetiger 70, right parapodium. F. Chaetiger 75, right parapodium. G. Chaetiger 82, right parapodium. H. Chaetiger 100, right parapodium. I. Right jaw, dorsal view. J. Supra-acicular heterogomph falciger, chaetiger 31. K. Supra-acicular heterogomph falciger, chaetiger 75. L. Sub-acicular heterogomph falciger, chaetiger 31. M. Sub-acicular heterogomph falciger, chaetiger 75. N. Sub-acicular heterogomph falciger, chaetiger 82. Scale bars: A–F, H = 0.2 mm; G, I = 0.1 mm; J–N = 10 μm.
Fig. 8 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. 8. Perinereis websteri sp. nov. A, F–G. Holotype (USNM 1490807). B–C, H. Paratype (USNM 1490809). D–E. Non-type (USNM 14900805). A. Whole specimen, dorsal view. B. Pharynx, dorsal view. C. Same, ventral view. D. Pharynx, dorsal view. E. Same, ventral view. F. Anterior end, dorsal view. G. Posterior end, dorsal view. H. Pharynx, ventral view. Scale bars: A = 1.5 mm; B–H = 1 mm.
Fig. 6 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. 6. Perinereis bairdii (Webster, 1884). Topotype male (USNM 1480197). A. Right jaw, dorsal view. B. Chaetiger 2, left parapodium. C. Chaetiger 3, left parapodium. D. Chaetiger 7, left parapodium. E. Chaetiger 10, left parapodium. F. Chaetiger 14, left parapodium. G. Chaetiger 15, left parapodium. H. Chaetiger 30, left parapodium. I. Chaetiger 50, left parapodium. J. Chaetiger 72, left parapodium. Scale bars: A–B, J = 0.1 mm; C–I = 0.2 mm.
Fig. 7 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. 7. Perinereis websteri sp. nov. Non-types (USNM 1660577, from syntype series of Nereis bairdii Webster, 1884). A. Anterior end, dorsal view. B. Anterior end, dorsal view. C. Pharynx, dorsal view. D. Same, ventral view. E. Chaetiger 10, left parapodium. F. Chaetiger 43, left parapodium. G. Chaetiger 69, left parapodium. H. Chaetiger 84, left parapodium. Scale bars: A–B = 1 mm; C–D = 0.5 mm; E–G = 0.2 mm; H = 0.1 mm.
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.
Figure 6. A–F in Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations
Figure 6. A–F: Arichlidon gathofi, 7-segmented larva, Carolina, West Atlantic, USNM 186017. A, Entire larva, dorsal view; B, ventral view of A; C, notopodium segment IV; D, notopodium segment VI (figs A, C, after Watson Russell, 1987: Figs 28.4, 6: as 'new genus 1'). E, A. gathofi, adult, mid-body notopodium, detail median fascicle; F, mid-body neuropodium with epitokous swimming neurochaetae (figs E, F after Watson Russell, 2000: Figs 1D, 5A). Scalebars: A, 200µm; B, 350µm; C-E, 40 µm; F, 100µm.
Figure 5. A–F in Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations
Figure 5. A–F: Arichlidon reyssi 6-segmented larva, Arcachon, NE Atlantic, NTM 25385; A, D–F: slide preparations. A, Entire larva, dorsal view; B, anterior end, dorsal, left side detail (transitory chaetae drawn in part); C, anterior end, ventral view, left side detail; D, detail of anterior end of fig. 5A; E, notopodium segment IV; F, neuropodia segments IV and V. Scalebars: A, 50µm; B-C, 100µm; D-F, 10 µm.
Figure 4. A–B in Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations
Figure 4. A–B: Arichlidon reyssi, adult, Senghor Seamount, NMS.Z.2013.160.09, slide preparations. A, Anterior end; B, mid-body notopodium from anterior end. Scalebars: A, 100 µm; B, 50µm.
Figure 2. A–D in Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations
Figure 2. A–D: Thrausmatos senghorensis sp. nov., Senghor Seamount, SMF 22963. A, Anterior end, dorsal view, slide preparation; B, anterior end, dorsal view; C, mid-body parapodium, slide preparation; D, detail of superior-most neurochaeta (asterisked in fig. 2C). Scalebars: A-C, 100 µm; D, 10µm.
Figure 3. A–B in Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations
Figure 3. A–B: Dysponetus caecus, Senghor Seamount, SMF 22964. A, Anterior end, dorsal view, slide preparation; B, neuropodium XII with superior swimming neurochaetae. Scalebars: A-B, 100µm.
Figure 1. A in Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations
Figure 1. A, Map of Senghor Seamount, located in the Cape Verde Archipelago, NE Atlantic. Data extracted from Smith and Sandwell (1997); dataset created by A. Dale (SAMS). B, Senghor Seamount with the location of transects. Data and map created by Thor Hansteen and Alexander Schmidt, GEOMAR. (A, B, reproduced from Chivers et al., 2013.)
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.
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