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Fig. 4 in Distribution and diversity of the Opheliidae (Annelida, Polychaeta) on the continental shelf and slope of Iceland, with a review of the genus Ophelina in northeast Atlantic waters and description of two new species

Fig. 4 Ophelina abranchiata (Støp-Bowitz) (IMNH 24328, BIOICE sample 3219). a Mid-body chaetiger. b Anterior end, lateral view; arrows mark positions of lateral organs of first achaetigerous segments. c Lateral organ of an achaetigerous anterior segment. d Detail of lateral organ. e Nuchal organ. f Anal tube; arrow shows breakline; insert: detail of posterior end without anal tube. Scale bars: (a) 20 μm; (b) 600 μm; (c, e) 10 μm; (d) 5 μm; (f) 900 μm

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Fig. 3 in Distribution and diversity of the Opheliidae (Annelida, Polychaeta) on the continental shelf and slope of Iceland, with a review of the genus Ophelina in northeast Atlantic waters and description of two new species

Fig. 3 Ammotrypanella cf. arctica McIntosh (IMNH 24327, BIOICE sample 3648). a Anterior end, dorsal view. b Detail of prostomium and first chaetiger. c First and second chaetigers. d Chaetigers 14–16; arrow points to posterior. e Posterior end, lateral view, anal cirrus lost; shape of arrow reflects typical S shape of posterior body region. f Anal tube, dorsal view, arrow: anal cirrus. Scale bars: (a) 800 μm; (b, d) 100 μm; (c) 500 μm; (e) 300 μm; (f) 200 μm

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Fig. 2 in Distribution and diversity of the Opheliidae (Annelida, Polychaeta) on the continental shelf and slope of Iceland, with a review of the genus Ophelina in northeast Atlantic waters and description of two new species

Fig. 2 Ammotrypanella cf. arctica McIntosh (IMNH 24326). a Anterior end, dorsal view. b Posterior end, lateral view. Scale bar: 0.5 mm

Fig. 11 in Intraspecific variations in species of Ophiuroidea (Echinodermata) from the Tropical Southwest Atlantic, Northeast Brazil

Fig. 11 Amphipholis squamata (Delle Chiaje, 1828). Early stage: a–b lateral arm plates; d–e oral plate. Intermediate stage: c, f–g lateral arm plates; h–i oral plate. Adult specimen: j–l lateral arm plates; m–n oral plate. Abbreviations: abaa, abradial articulation area; abmaa, abradial

Fig. 4 in Intraspecific variations in species of Ophiuroidea (Echinodermata) from the Tropical Southwest Atlantic, Northeast Brazil

Fig. 4 Ophionereis reticulata (Say, 1825). Early stage: a dental plate; b vertebrae dorsal; c vertebrae ventral; d vertebrae distal. Intermediate stage: e dental plate; f vertebrae dorsal; g vertebrae ventral; h vertebrae distal; i vertebrae proximal. Adult specimen: j dental plate; k vertebrae dorsal; l vertebrae ventral; m vertebrae distal; n vertebrae proxi-

Fig. 5 Ophionereis squamulosa Koehler, 1914 in Intraspecific variations in species of Ophiuroidea (Echinodermata) from the Tropical Southwest Atlantic, Northeast Brazil

Fig. 5 Ophionereis squamulosa Koehler, 1914. Early stage: a dorsal disc; b radial shield; c ventral disc; d jaw. Intermediate stage: e dorsal disc; f radial shield; g ventral disc; h jaw. Adult specimen: i dorsal disc; j radial shield; k ventral disc; l jaw. Abbreviations: ads, adoral

Fig. 10 in Intraspecific variations in species of Ophiuroidea (Echinodermata) from the Tropical Southwest Atlantic, Northeast Brazil

Fig. 10 Amphipholis squamata (Delle Chiaje, 1828). Early stage: a dorsal arm; b ventral arm; c dorsal arm plate; d ventral arm plate; e arm spine. Intermediate stage: f dorsal arm; g ventral arm; h dorsal arm plate; i ventral arm plate; j arm spine; k genital plate. Adult specimen:

Fig. 14 in Intraspecific variations in species of Ophiuroidea (Echinodermata) from the Tropical Southwest Atlantic, Northeast Brazil

Fig. 14 Frequency of occurrence according to disc size classes of Amphipholis squamata (Delle Chiaje, 1828)

Fig. 13 in Intraspecific variations in species of Ophiuroidea (Echinodermata) from the Tropical Southwest Atlantic, Northeast Brazil

Fig. 13 Amphipholis squamata (Delle Chiaje, 1828). Vertebrae closest to the mandible of the adult specimen: a vertebrae dorsal; c vertebrae ventral; e vertebrae proximal; f vertebrae distal. Intermediate stage: b vertebrae dorsal; d vertebrae ventral

FIGURE 33 in Revision of the genus Harmothoe Kinberg, 1856 (Polychaeta: Polynoidae) in the Northeast Atlantic

FIGURE 33. Harmothoe viridis (holotype, SMNH-Type-3171). (A) anterior end; left palp bent downwards, right palp missing, styles of right dorsal tentacular cirrus and left dorsal cirrus missing; (B) right anterior elytron from unknown segment, free in vial; (C) detail of posterior margin of same; (D) left cirrigerous parapodium from segment 14, posterior view, style of dorsal cirrus missing; (E) long notochaeta; (F) tip of same; (G) middle neurochaeta; (H) tip of same; (I) tip of lower neurochaeta. (Scales: A, B = 2 mm; C, F, H, I = 100 µm; E, G = 250 µm).

FIGURE 29 in Revision of the genus Harmothoe Kinberg, 1856 (Polychaeta: Polynoidae) in the Northeast Atlantic

FIGURE 29. Harmothoe rarispina (large syntype, ZMO C3157a). (A) anterior end; (B) left anterior elytron from unknown segment, free in vial; (C) detail of posterior margin of same; (D) right cirrigerous parapodium from unknown segment, free in vial, posterior view; (E) distal part of long notochaeta; (F) distal part of middle, bidentate neurochaeta; (G) tip of upper neurochaeta; (H) tip of middle, unidentate neurochaeta; (I) tip of lower neurochaeta. (Scales: A, B = 2 mm; C = 500 µm; D = 1 mm; E–I = 250 µm).

FIGURE 18 in Revision of the genus Harmothoe Kinberg, 1856 (Polychaeta: Polynoidae) in the Northeast Atlantic

FIGURE 18. Harmothoe fraserthomsoni (additional specimens, SMF 12470: small spm., Fig. 18A; large spm., Figs. 18B–J). (A) anterior end; (B) left elytron from unknown segment; (C) detail of posterior margin of same; (D) right cirrigerous parapodium from segment 12, posterior view, style of dorsal cirrus not figured; (E) long notochaeta; (F) tip of same; (G) middle neurochaeta; (H) tip of same; (I) tip of upper neurochaeta; (J) tip of lower neurochaeta. (Scale: A = 1 mm; B = 2 mm; C = 250 µm; D = 500 µm; E, G = 250 µm; F, H–J = 100 µm).

FIGURE 10 in Revision of the genus Harmothoe Kinberg, 1856 (Polychaeta: Polynoidae) in the Northeast Atlantic

FIGURE 10. Harmothoe aspera (small syntype, ZMBN 2000). (A) anterior end, palps and style of median antenna missing, left dorsal tentacular cirrus regenerating; (B) right anterior elytron from unknown segment; (C) detail of posterior margin of same; (D) right cirrigerous parapodium from unknown segment, posterior view, style of dorsal cirrus missing; (E) short notochaeta; (F) long notochaeta; (G) tip of same; (H) middle neurochaeta; (I) tip of same; (J) distal part of upper neurochaeta; (K) lower neurochaeta. (Scale: A, B = 2 mm; C, E, F, H, J, K = 250 µm; D = 1 mm; G = 50 µm; I = 100 µm).

FIGURE 14 in Revision of the genus Harmothoe Kinberg, 1856 (Polychaeta: Polynoidae) in the Northeast Atlantic

FIGURE 14. Harmothoe evei (holotype, BMNH ZB 1983.1767). (A) anterior end; palps and styles of median antenna, left tentacular cirrus, and left dorsal cirrus missing; (B) left middle or posterior elytron from unknown segment, free in vial; (C) detail of lateral margin of same; (D) right elytragerous parapodium from segment 13, posterior view, style of dorsal cirrus missing; (E) distal part of long notochaeta; (F) tip of upper neurochaeta; (G) tip of middle neurochaeta; (H) tip of lower neurochaeta. (Scales: A = 2 mm; B, D = 1 mm; C = 250 µm; E = 100 µm, F–H = 50 µm).