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FIGURE 6 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 6. Anterior elytra of Lepidonotus aff. crosslandi peruana Hartmann-Schröder, 1962 (specimen MUSM Nº 4590) with their respective illustration of ornamentation distribution. A) 1st right elytron; B) 2nd right elytron; C) 3rd right elytron. Scale bars: A–C) 1 mm.

FIGURE 14 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 14. Posterior elytra of Halosydna parva Kinberg, 1856 (Specimen MUSM Nº 4647) with their respective illustration of ornamentation distribution. A) 16th right elytron; B) 17th right elytron; C) 18th right elytron. Scale bars: A–C) 1 mm.

FIGURE 15 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 15. Distinct degrees of development of conical macrotubercles (arrows) in Halosydna parva Kinberg, 1856 (specimen MUSM Nº 4648b). A–B) 3rd pair of elytra; C–D) 16th pair of elytra; E–F) 18th pair of elytra. Scale bars: 40 µm.

FIGURE 11 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 11. Elytral ornamentations of Halosydna parva Kinberg, 1856 (Specimen MUSM Nº 4647). A) Conical microtubercles with swollen, wrinkled, bifid tips (arrows); B) Conical macrotubercles with wrinkled tips; C) Same, with wide internal concavities (arrows); D) Truncate microtubercles; E) Rounded papillae with narrow bases (arrows); F) Flattened microtubercles (arrows). Illustration of ornamentations and designation of symbols. G) Conical microtubercles with swollen, wrinkled, bifid tips as green circles; H) Conical macrotubercles with narrow and wide internal concavities as red circles; I) Truncate microtubercles as blue circles; (J) Rounded papillae with narrow bases as black tiny circles; K) Flattened microtubercles as yellow circles. Scale bars: 20 µm.

FIGURE 7 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 7. Posterior elytra of Lepidonotus aff. crosslandi peruana Hartmann-Schröder, 1962 (specimen MUSM Nº 4590) with their respective illustration of ornamentation distribution. A) 10th right elytron; B) 11th right elytron; C) 12th right elytron. Scale bars: A–C) 1 mm.

FIGURE 8 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 8. Pharynx and jaws of Lepidonotus aff. crosslandi peruana Hartmann-Schröder, 1962. A) Frontal view of pharynx. B) Dorsal jaws seen from the pharyngeal lumen. C) Ventral jaws seen from the pharyngeal lumen. Scale bars: A) 1 mm; B–C) 400 µm.

FIGURE 3 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 3. Lepidonotus aff. crosslandi peruana Hartmann-Schröder, 1962. A) Dorsal view of the body with elytra (specimen MUSM Nº 4591a); B) Dorsal view of the body, without elytra (specimen MUSM Nº 4590); C) Anterior region of specimen MUSM Nº 4590. Scale bars: A–B) 5mm; C) 1 mm.

FIGURE 4 in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 4. Parapodia, notochaetae and neurochaetae of Lepidonotus aff. crosslandi peruana Hartmann-Schröder, 1962 (specimen MUSM Nº 4590). A) 2nd left parapodium; B) 3rd left parapodium; C) 13th left parapodium; D) Superior notochaeta; E) Inferior notochaeta; F) Superior neurochaeta from the 2nd left parapodium; G) Inferior neurochaeta from the 2nd left parapodium; H) Superior neurochaeta from the 3rd left parapodium; I) Inferior neurochaeta from the 3rd left parapodium; J) Superior neurochaeta from the 13th left parapodium; K) Inferior neurochaeta from the 13th left parapodium. Scale bars: A–C) 1 mm; D–K) 20 µm.

FIGURE 9. Halosydna parva Kinberg, 1856. A in Scale-bearing beauty: Intertidal scale-worms (Polychaeta: Polynoidae) from Punta Blanca (Arequipa, Peru)

FIGURE 9. Halosydna parva Kinberg, 1856. A) Dorsal view of specimen MUSM Nº 4647 after elytra detachment; B) Dorsal view of specimen MUSM Nº 4648b; C) Prostomium of specimen MUSM Nº 4647. Scale bars: A–B) 5 mm; C) 1 mm.

FIGURE 6. Leptoecia benthaliana. A–C in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 6. Leptoecia benthaliana. A–C, anterior falcigers (the black arrows indicate subdistal reduction in the diameter of the falciger, modified from Orensanz 1990); Leptoecia midatlantica sp. nov. D, E, simple unidentate falcigers from chaetiger 1; F, G, simple bidentate falcigers from chaetiger 1; H, simple bidentate hook from chaetiger 35.

FIGURE 4 in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 4. Leptoecia midatlantica sp. nov. A, parapodium of chaetiger 1, anterior view; B, same, posterior view; C, parapodium of chaetiger 2, anterior view; D, parapodium of chaetiger 3, anterior view; E, parapodium of chaetiger 6, posterior view; F, parapodium of chaetiger 12, anterior view; G, parapodium of chaetiger 33, anterior view; H, parapodium of chaetiger 34, anterior view; I, parapodium of chaetiger 35, anterior view; J, parapodium of chaetiger 66, anterior view.

FIGURE 3 in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 3. Leptoecia midatlantica sp. nov. A, C, anterior region of the body, ventral view; B, same, dorsal view; D, F prostomium and peristomium, ventral view; E, same, dorsal view; G, sensory organs on prostomium, dorsal view; H, posterior region of the body, ventral view; I, pygidium, dorsal view; J pygidial glandular buds; K, posterior chaetigers, dorsal view. ac—anal cirrus, dc—dorsal cirrus, fl—frontal lip, la—lateral antenna, ll—lower lip, ma—median antenna, mnd—mandibles, p—palp, per—peristomium, pg—pygidium, pl—postchaetal lobe, prl—prechaetal lobe, ul—upper lip, vc—ventral cirrus.

FIGURE 5 in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 5. Leptoecia midatlantica sp. nov. A, parapodium of chaetiger 2, ventral view; B, parapodium of chaetiger 3, ventral view; C, parapodia of chaetigers 8–10, dorsal view; D–G, simple bidentate falcigers from chaetiger 1; H, simple unidentate falciger from chaetiger 1; I, limbate chaetae; J–L, pectinate chaetae; M, N, simple subacicular hooks from anterior region of the body; O, simple subacicular hooks from the posterior region of the body; P, compound subacicular hook from the last chaetiger. dc—dorsal cirrus, pl—postchaetal lobe, vgp—ventral glandular pad, vc—ventral cirrus.

FIGURE 7 in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 7. Leptoecia midatlantica sp. nov. A, relationship between body width of specimens (N = 67) and origin of subacicular hooks; B, average body width of specimens with bilobed and conical prostomia.

FIGURE 1 in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 1. Distribution of Leptoecia midatlantica sp. nov. The black arrow indicates the type location; 2500 m, 3000 m and 4500 m isobaths shown.

FIGURE 2 in Leptoecia midatlantica, a new species of the deep-sea quill-worms (Polychaeta: Onuphidae: Hyalinoeciinae) from the Mid-Atlantic Ridge

FIGURE 2. Leptoecia midatlantica sp. nov. A, anterior region of the holotype, ventral view; B, same, dorsal view; C–E shape of the prostomium, ventral view; F, maxillae; G, mandibles; H, pygidium of the holotype, ventral view; I, same, dorsal view; J– L, pygidia, dorsal view.

FIGURE 6. A–B. Lithacrosiphon cristatus. A in Peanut worms of the phylum Sipuncula from the Nha Trang Bay (South China Sea) with a key to species

FIGURE 6. A–B. Lithacrosiphon cristatus. A) lateral view, introvert everted; B) hooks. C–D. Cloesiphon aspergillus. C) lateral view, introvert retracted; D) hook. Scale bars: A, 5 mm; B, 20 µm; C, 2 mm; D, 20 µm.

FIGURE 4. A in Peanut worms of the phylum Sipuncula from the Nha Trang Bay (South China Sea) with a key to species

FIGURE 4. A. Antillesoma antillarum, lateral view, introvert everted. B–D. Apionsoma misakianum. B) lateral view, introvert everted; C) lateral view, introvert retracted; D) hook. E–F. A. trichocephalus. E) head (white arrowhead - rudimental tentacle on dorsal arc.); F) hook. Scale bars: A–B, 5 mm; C, 2 mm; D, 20 µm; E, 100 µm; F, 20 µm.

FIGURE 2. A–B. Nephasoma pellucidum. A in Peanut worms of the phylum Sipuncula from the Nha Trang Bay (South China Sea) with a key to species

FIGURE 2. A–B. Nephasoma pellucidum. A) lateral view, introvert everted; B) hook. C) Thysanocardia catharinae, lateral view, introvert everted. D) Themiste cymodoceae, dorsal view, introvert everted. Scale bars: A, 5 mm; B, 100 µm; C–D, 2.5 mm.

FIGURE 1. A in Peanut worms of the phylum Sipuncula from the Nha Trang Bay (South China Sea) with a key to species

FIGURE 1. A. Sipunculus nudus, dorsal view, introvert everted. B–D. Siphonosoma australe. B) lateral view, introvert retracted; C) head with tentacular apparatus; D) hooks. Scale bars: A–B, 10 mm; C, 3 mm; D, 0.3 mm.