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FIG. 54 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 54. — Hesione splendida Savigny in Lamarck, 1818, non-type specimen, UF 46: A, anterior region, dorsal view; B, prostomium, dorsal view (arrows point to antennae); C, chaetiger 2, right parapodium, anterior view, an oocyte released (inset: acicular lobe); D, chaetiger 6, right parapodium, anterior view, oocytes inside parapodial coelom (inset: acicular lobe); E, neurochaetal blades, left one from chaetiger 2, others from chaetiger 6 (insets: close-up of tips); F, posterior region, dorsal view. Scale bars: A, 2 mm; B, 0.3 mm; C, 0.4 mm; D, 0.7 mm; E, 60 µm; F, 0.5 mm.

FIG. 53 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 53. — Hesione splendida Savigny in Lamarck, 1818, syntypes of H. ehlersi Gravier,1900, MNHN-IA-TYPE0287: A, largest syntype, anterior region, dorsal view; B, same, anterior end, dorsal view; C, second largest syntype, anterior region, dorsal view; D, same, anterior end, dorsal view; E, largest syntype, chaetiger 9, left parapodium, anterior view (inset: acicular lobe); F, same, chaetiger 10, left parapodium, anterior view (inset: acicular lobe, folded); G, same, neurochaetae (insets: blade tips). Scale bars: A, 1 mm; B, D, E, 0.5 mm; C, 1.4 mm; F, 0.3 mm; G, 0.2 mm.

FIG. 52 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 52. — Hesione splendida Savigny in Lamarck, 1818, lectotype, MNHN-IA-TYPE-140: A, dorsal view, note the longitudinal eccentric dissection; B, anterior region, dorsal view; C, chaetiger 8, right parapodium, anterior view (insets: close-ups of acicular lobe and tips of blades); D, posterior region, oblique dorsal view. Scale bars: A, 2.3 mm; B, 1.7 mm; C, 0.2 mm; D, 1 mm.

FIG. 48 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 48. — Hesione sicula delle Chiaje, 1830, reinst., neotype, ZMB 7529: A, anterior region, dorsal view; B, prostomium and everted pharynx, dorsal view (arrow points to right lateral antenna); C, chaetiger 9, left parapodium, anterior view (inset: acicular lobe); D, same, lower half of neurochaetal bundle (insets: blades); E, posterior region, dorsal view. Scale bars: A, E, 1.8 mm; B, 0.9 mm; C, 0.5 mm; D, 80 µm.

FIG. 46 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 46. — Hesione praetexta Ehlers, 1887: A, parapodium from a middle-body segment; B, same, tip of neurochaetal tip (modif. after Ehlers, 1887, scale bars missing in original).

FIG. 51 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 51. — Hesione sicula delle Chiaje, 1830, reinst., non-type specimens, MNHN IA-PNT-106 (formerly jar de Saint-Joseph 20): A, complete, oblique dorsal view; B, anterior region, pharynx exposed, dorsal view; C, prostomium and base of pharynx, dorsal view (arrows point to left lateral antennae, asterisk indicates dorsal papilla); D, another specimen, prostomium and base of pharynx, dorsal view (asterisk indicates dorsal papilla); E, another specimen, posterior region, dorsal view. Scale bars: A, 4 mm; B, 2.4 mm; C, 0.5 mm; D, 0.4 mm; E, 1.8 mm.

FIG. 41 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 41. — Hesione picta Müller, 1858, non-type specimen, ECOSUR OH 468: A, anterior region, dorsal view; B, posterior region, dorsal view; C, head, close-up, dorsal view; D, pygidium, close-up, dorsal view; E, anterior region, ventral view; F, chaetiger 8, left parapodium, anterior view (insets upper and lower neurochaetal blades). Scale bars: A, 1.5 mm; B, 2 mm; C, D, 0.6 mm; E, 1.1 mm; F, 0.7 mm.

FIG. 55. — Hesione uchidai n in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 55. — Hesione uchidai n. sp., holotype, UF 4384: A, alive, dorsal view; B, anterior body half, dorsal view, pharynx exposed; C, prostomium and basal pharynx ring, prostomium slightly oblique, bent dorsally (arrows point to antennae, asterisk indicates dorsal papilla); D, chaetiger 7, left parapodium, anterior view (inset: acicular lobe); E, same, neurochaetae (insets: blades); F, chaetiger 12, left parapodium, anterior view; G, same, neurochaetae (insets: blades). Scale bars: A, 2.2 mm, B, 2 mm; C, D, 0.3 mm; E, 150 µm; F, 0.5 mm; G, 230 µm.

FIG. 38. — Hesione paulayi n in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 38. — Hesione paulayi n. sp., anterior region of three different specimens, arranged in a progressive reduction of the discontinuous band in chaetiger 3: A, paratype, Papua New Guinea, UF 5845; B, non-type specimen, Society Islands, Moorea, UF 887; C, non-type specimen, Eastern Australia, AMNH 31859. Scale bars: A, 1.1 mm; B, 0.8 mm; C, 1.2 mm.

FIG. 30 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 30. — Hesione pacifica McIntosh, 1885, holotype, BMNH 85.12.1.136: A, anterior region, dorsal view; B, prostomium, dorsal view (arrows point to antennae); C, chaetiger 15, right parapodium, anterior view (inset: neurochaetal remains); D, posterior region, dorsal view; E, same, close-up of pygidium. Scale bars: A, 1 mm; B, 0.2 mm; C, E, 0.3 mm; D, 0.9 mm.

FIG. 20. — Hesione helenensis n in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 20. — Hesione helenensis n. sp., holotype, USNM 33148: A, anterior region, dorsal view, pharynx partially exposed; B, prostomium, dorsal view (arrow points to left antenna); C, chaetiger 9, left parapodium, anterior view (insets: acicular lobe and bases of cirrostyles); D, same, neurochaetae (insets: blades); E, posterior region, dorsal view. Scale bars: A, 1.7 mm; B, 0.2 mm; C, 0.5 mm; D, 160 µm; E, 1.8 mm.

FIG. 1 in Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae)

FIG. 1. — Range variation of neurochaetal blades length: width ratios in three chaetigers (3, 7, 9), observed in two different Hesione Savigny in Lamarck, 1818 species: A, H. picta Müller, 1858 from Florida (18 mm: UF 825, 26 mm: UF 826, 32 mm: UF 1593); B, H. praetexta Ehlers, 1887 from Florida (22 mm: UF 1060, 32 mm: UF 1064, 54 mm: UF 2574).

FIGURE 1 in Does polyxenous symbiosis promote sympatric divergence? A morphometric and phylogeographic approach based on Oxydromus okupa (Annelida, Polychaeta, Hesionidae)

FIGURE 1 Sampled localities of the host bivalves harbouring Oxydromus okupa in the Gulf of Cadiz region: (CI) Cádiz Intertidal (Scrobicularia plana); (CS) Cádiz Subtidal (Macomopsis pellucida); (CH) Chipiona intertidal (M. pellucida). Images obtained from Google Earth v. 7.3, © Google 2018.

FIGURE 6 in Does polyxenous symbiosis promote sympatric divergence? A morphometric and phylogeographic approach based on Oxydromus okupa (Annelida, Polychaeta, Hesionidae)

FIGURE 6 Maximum-likelihood tree of 16S haplotype data. Bootstrap values for node support>75 are represent- ed on the corresponding branches.

FIGURE 3 Principal Component Analyses plots. A in Does polyxenous symbiosis promote sympatric divergence? A morphometric and phylogeographic approach based on Oxydromus okupa (Annelida, Polychaeta, Hesionidae)

FIGURE 3 Principal Component Analyses plots. A: Based on size independent data. B: Based on character proportions. CI: Cadiz Intertidal (Scrobicularia plana); CS: Cadiz Subtidal (Macomopsis pellucida); CH: Chipiona intertidal (M. pellucida). Character abbreviations as in fig. 2.

FIGURE 8 in Does polyxenous symbiosis promote sympatric divergence? A morphometric and phylogeographic approach based on Oxydromus okupa (Annelida, Polychaeta, Hesionidae)

FIGURE 8 Juvenile phases of Oxydromus okupa. A: The smallest exemplar collected in the study (0.96 mm long) at CH. B: A juvenile (1.10 mm long) found at CI. C: A juvenile (1.54 mm long) collected at CH.

Fig. 4. Leocratides filamentosus Ehlers, 1908 in Leocratides (Annelida: Hesionidae) from the Pacific Coast of Middle Honshu, Japan, with a Description of Leocratides kimuraorum sp. nov.

Fig. 4. Leocratides filamentosus Ehlers, 1908. Right parapodium of chaetiger 10, NSMT-Pol 113219. A, General appearance of parapodium, posterior view; B, cirrophore; C, ventral cirrus; D, acicular lobe; E, bundle of neurochaetae; F, blade of neurochaeta. Scale bars: A, 1 mm; B–E, 300 µm; F, 100 µm.

Fig. 1 in Leocratides (Annelida: Hesionidae) from the Pacific Coast of Middle Honshu, Japan, with a Description of Leocratides kimuraorum sp. nov.

Fig. 1. Leocratides kimuraorum sp. nov., holotype, NSMT-Pol H-622. A, Live specimen, dorsal view; B, same, ventral view; C, integument and lateral cushions in chaetigers 4–5, dorsal view; D, prostomium, dorsal view; E, pharynx and peristomium, ventral view, showing facial tubercle (white arrow), cushion-shaped appendages (black arrows), and dorsal jaw plates (arrowheads); F, pharynx with terminal papillae, ventral view. Scale of the ruler: A, B, 1 mm. Scale bars: C–F, 1 mm.

Fig. 2 in Leocratides (Annelida: Hesionidae) from the Pacific Coast of Middle Honshu, Japan, with a Description of Leocratides kimuraorum sp. nov.

Fig. 2. Leocratides kimuraorum sp. nov., right parapodium of chaetiger 5, holotype, NSMT-Pol H-622. A, General appearance of parapodium, anterior view; B, cirrophore; C, ventral cirrus; D, acicular lobe, arrow indicating its tip, the base side of photo is the parapodial tip; E, bundle of neurochaetae; F, blade of neurochaeta. Scale bars: A, 2 mm; B–E, 300 µm; F, 50 µm.

Fig. 3. Leocratides filamentosus Ehlers, 1908. A, B, F in Leocratides (Annelida: Hesionidae) from the Pacific Coast of Middle Honshu, Japan, with a Description of Leocratides kimuraorum sp. nov.

Fig. 3. Leocratides filamentosus Ehlers, 1908. A, B, F; NSMT-Pol 113220, C–E; NSMT-Pol 113219. A, Live specimen inside a fragment of an Aphrocallistes sp. hexactinellid sponge, dorsal view; B, same specimen, ventral view; C, integument and lateral cushions in chaetigers 2–4, dorsal view; D, prostomium, dorsal view; E, pharynx and peristomium, ventral view, showing facial tubercle (white arrow) and papillose peristomial membrane (black arrows); F, pharynx with terminal papillae, ventral view. Scale bars: A, B, 10 mm; C–F, 1 mm.