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FIGURE 5. Marphysa sessilobranchiata. A in One new species and two redescriptions of Marphysa (Eunicidae, Annelida) species of the Aenea-group from Australia

FIGURE 5. Marphysa sessilobranchiata. A. Anterior end of paratype, dorsal view. B. Anterior end of paratype, lateral view. C. Maxillary apparatus of non-type specimen, dorsal view. D. Left MxI, II, III, IV and V, dorsal view. E. Right MxI, II, IV and V, dorsal view. F. Right parapodium 4 of non-type specimen, anterior view. G. Right parapodium 7 of paratype, anterior view. H. Median parapodia, dorsolateral view. I. Right parapodium 21 of non-type specimen, anterior view. J. Right parapodium 116 of non-type specimen, anterior view, branchial stems attached to body wall. K. Left parapodium 5–6 of paratype, lateral view, neuroaciculae distributed in an oblique row. L. Compound falciger chaetae, right parapodium 7 of paratype. M. Compound falciger chaetae of paratype. N. Compound falciger chaetae serrated, parapodium 4. O. Curved thin pectinate chaetae, right parapodium 21. P. Curved thick pectinate chaeta, left parapodium 152. Q. Bidentate subacicular hook, right parapodium 76R. R. Subacicular hook bidentate, left parapodium 152. A, B, G, H, K–M, P, R. AM W.198420. C–F, I, J, N, O, Q. AM W.20292. Scale bars: A–G, I, J. 100 µm. H, K. 500 µm. L, N–R. 10 µm.

FIGURE 4 in One new species and two redescriptions of Marphysa (Eunicidae, Annelida) species of the Aenea-group from Australia

FIGURE 4. Neighbor joining tree based on cytochrome oxidase I (COI) sequences and Kimura-2-parameters model; bootstrap branch support above 70% shown on branches.

FIGURE 3. Marphysa pseudosessiloa n in One new species and two redescriptions of Marphysa (Eunicidae, Annelida) species of the Aenea-group from Australia

FIGURE 3. Marphysa pseudosessiloa n. sp. A. Anterior end of holotype, dorsal view. B. Anterior end of paratype, dorsal view. C. Anterior end of holotype, lateral view. D. Anterior end of paratype, lateral view. E. Anterior end of paratype, anterior view. F. Maxillary apparatus of paratype, dorsal view. G. Right parapodium 15 of paratype, anterior view. H. Left parapodium 31 of paratype, anterior view. I. Parapodium 3 of paratype. J. Parapodium 45 of paratype. K. Branchiae palmate, posterior view, left parapodium of chaetiger between 143 and 163 of paratype. L. Anterior parapodia, lateral view. M. Neurochaetae, acicula and subacicular hook, parapodium 185; arrow to shaft of wide pectinate chaeta. N. Compound falciger chaetae, parapodium 3. O. Compound falciger chaeta of paratype, parapodium 15. P. Compound falciger chaetae strongly serrated, parapodium 218 of paratype. Q. Neurochaetae, acicula, subacicular hook, parapodium 45 of paratype; arrow to shaft of thin pectinate chaeta. R. Thin pectinate chaeta, parapodium 81 of paratype. S. Curved thick pectinate chaetae, parapodium 218 of paratype. T. Subacicular hook bidentate, parapodium 143. A, C, L. AM W.37249. B, D, F, H–J, M, N, Q. AM W.37089. E, G, K, O, P, R- T. AM W.37250. Scale bars: A–D. 500 µm. E–L. 100 µm. M, N, P, Q, S, T. 10 µm. O, R. 2 µm. BrSt, branchial stem; NC, notopodial cirri.

FIGURE 1. Marphysa bifurcata. A in One new species and two redescriptions of Marphysa (Eunicidae, Annelida) species of the Aenea-group from Australia

FIGURE 1. Marphysa bifurcata. A. Anterior end of live specimen, lateral view. B. Anterior end of holotype, dorsal view. C. Anterior end of non-type specimen, dorsal view. D. Anterior end, lateral view, eyes between antennophore and antennal styles. E. Anterior end, ventral view. F, G. Mandibles, ventral view, arrow to medioanterior tooth. H: Maxillary apparatus of holotype, dorsal view. I: Maxillary apparatus of non-type specimen, dorsal view. J. Left Mx III and IV. K. Right Mx IV, dorsal view. A. AM W.44582. B, H, J, K. AM W.6820. C. AM W.44633. D, E. AM W.44920. F. AM W.44632. G. AM W.44982. I. AM W.44977. Scale bars: B. 1 mm. C–K. 500 µm.

FIGURE 2. Marphysa bifurcata. A. Right parapodium 5, anterior view. B. Right parapodium 52, posterior view. C. Right parapodium 132, anterior view. D. Abruptly tapering semi bifurcated notopodial cirri, right parapodium. E. Median parapodia, anterior view. F. Left parapodium 12 in One new species and two redescriptions of Marphysa (Eunicidae, Annelida) species of the Aenea-group from Australia

FIGURE 2. Marphysa bifurcata. A. Right parapodium 5, anterior view. B. Right parapodium 52, posterior view. C. Right parapodium 132, anterior view. D. Abruptly tapering semi bifurcated notopodial cirri, right parapodium. E. Median parapodia, anterior view. F. Left parapodium 12, anterior view; G. Bifurcated notopodial cirri, left parapodium 71, anterior view. H. Neurochaetae, right parapodium 5, anterior view. I. Compound falciger chaetae, left parapodium 8. J. Compound falciger chaetae, left parapodium 135, anterior view. K. Thin pectinate, left parapodium 30. L. Thin pectinate, left parapodium 72. M. Thick pectinate, left parapodium 108. N. Left parapodium 90, anterior view. O. Acicula, compound falciger chaetae and subacicular hook bidentate, left parapodium 146. P. Subacicular hook bidentate, left parapodium 48. Q. Subacicular hook bidentate, right parapodium 130. R. Subacicular hook bidentate with guards, right parapodium 90. A. AM W.44633. B–D, AM W.44391. E, F, K, N, O, AM W.6820. G, I, L, P, Q. AM W.44977. H, J, M, R. AM W.44920. Scale bars: A–D, M–O. 100 µm. E. 500 µm. F. 400 µm. G. 20 µm. H, J, K, P, R. 50 µm. I, Q. 10 µm. L. 5 µm.

FIGURE 3. Marphysa bulla n in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 3. Marphysa bulla n. sp. (A–C, SEM images, D-F, light microscopy images) A. Chaetiger 71, showing 2 tiers of compound spinigers. B. 3 types of pectinate chaetae of paratypes, left parapodia 135. C. 3 types of pectinate chaetae of paratypes, right parapodium 313. D. Left parapodium 250, showing pectinate chaetae. E. Maxillae, dorsal view. F. Mandible, ventral view. A. B, C, D—MBMCA285106; E, F—AM W.49125. Abbreviations: sp1 and sp2, 2 tiers of compound spinigers, a, thin symmetrical isodont with varying numbers of teeth, b, thick asymmetrical anodont with 3–4 teeth, c, thin asymmetrical isodont with numerous teeth, sa, subacicular hooks. Scale bars: A = 100µm; B = 20 µm; C = 50 µm; D = 0.1 mm; E, F = 1 mm.

FIGURE 6. Marphysa maxidenticulata n in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 6. Marphysa maxidenticulata n. sp. (Light microscopy images) A. Compound falciger of holotype, left parapodium 10, arrow pointing to falciger. B Compound falciger of holotype, left parapodium 50, arrow pointing to falciger. A, B—AM W.49113 (paratype). Abbreviations: sp1 and sp 2, two tiers of compound spinigers. Scale bars: A, B = 500 µm.

FIGURE 2. Marphysa bulla n in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 2. Marphysa bulla n. sp. (light microscopy images). A. Anterior end of holotype, dorsal view. B. Anterior end of holotype, lateral view. C. Anterior parapodia of holotype, lateral view, showing structure of ventral cirri. D. Jaws in situ, anterior view. E. Structure of branchiae from median region of holotype. F. Pygidium of holotype. A, B, C, E, H, AM.W.49124, D, AM.W.49125. Abbreviations: p, papilla vc, ventral cirrus, I, II, III, IV, V components of maxillae. Scale bars: A, B = 2 mm; C–F = 1 mm.

FIGURE 1 in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 1. Map showing type localities (blue dots) of M. bulla n. sp., M. maxidenticulata n. sp., M. orientalis Treadwell, 1936 and M. sinensis Monro,1934.

FIGURE 5. Marphysa maxidenticulata n in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 5. Marphysa maxidenticulata n. sp. (SEM images). A. Parapodium 25, B. Parapodium 290. C. Parapodium 25 showing 2 tiers of compound spinigers, D. Parapodium 3, E. Parapodium 203 showing 3 types of pectinate chaetae. F. Parapodium 3 with thin asymmetrical isodont pectinate chaetae with 10–14 teeth. All from paratype AM W.49116. Abbreviations: sa, subacicular hooks, sp1 and sp2, 2 tiers of compound spinigers, a. thick asymmetrical anodont with 3–4 teeth, b, thin isodont symmetrical with numerous fine teeth, c, thin isodont asymmetrical with many fine teeth. Scale bars: A, B, E = 20 µm; C =100 µm; D = 200 µm; F=10 µm.

FIGURE 4. Marphysa maxidenticulata n in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 4. Marphysa maxidenticulata n. sp. (light microscopy images). A. Anterior segments of paratype, dorsal view. B. Anterior segments of paratype, lateral view. C. Left anterior parapodia of paratype, lateral view. D. Mandible, ventral view. E. Maxillary apparatus, dorsal view. F. Pygidium of paratype. A, B, C, F—AM.W.49115. D, E.—AM W.49116. Scale bars: A, B. = 2 mm; C—F. = 1 mm.

FIGURE 8. Marphysa orientalis holotype USNM 20144 in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 8. Marphysa orientalis holotype USNM 20144 (light microscopy images) A. Pygidium. B. Compound falcigers, parapodium 130. C. Bidentate subacicular hook from posterior parapodium, arrow pointing to hook. D. Two types of pectinate chaetae with 14 or 18 teeth from parapodium 193. E. Thick asymmetrical anodont pectinate chaetae with coarse teeth from parapodium 256, indicated by arrows. F. Thin asymmetrical isodont pectinate chaetae with numerous teeth, from parapodium 256. Scale bars: A= 0.5 mm; B- F = 0.1 mm.

FIGURE 7. Marphysa orientalis holotype USNM 20144 in Two new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern coast of China and redescription for Marphysa orientalis Treadwell, 1936

FIGURE 7. Marphysa orientalis holotype USNM 20144 (light microscopy images) A. Anterior dorsal view of holotype. B. Lateral view of anterior parapodia. C. Lateral view of branchiae from middle region. D. Maxillae I & II, ventral view. E. Maxillae II & III, lateral view. F. Maxillary apparatus, dorsal view. Abbreviations: I, II, III, IV- maxillae I, II, III, IV Scale bars: A, F = 2 mm; B, C = 1 mm; D, E = 0.5 mm.

FIGURE 77 in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 77. Paucibranchia totospinata (Lu & Fauchald, 1998) n. comb., holotype NMWZ 1988.069.84. A. Maxillary apparatus, dorsal view; B. Left MI-II-III-IV-V, dorsal view; C. Right MI-II-IV-V, dorsal view; D. Mandibles. Scale bars: A, B, 0.35 mm; C, 0.25 mm; D, 0.4 mm.

FIGURE 79 in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 79. Paucibranchia totospinata (Lu & Fauchald, 1998) n. comb., non-type ECOSUR-P 2172. A. Isodonts pectinate narrow with long and slender teeth, chaetiger 26; B. Isodonts pectinate narrow with short and slender teeth, chaetiger 132; C. Compound spiniger, long blade, chaetiger 10; D. Compound spiniger, median blade, chaetiger 143; E. Compound falciger, long blade, chaetiger 12; F. Compound falciger, median blade, chaetiger 12; G. Compound falciger, short blade, chaetiger 224; H. Subacicular hook, chaetiger 132. Scale bars: A, 8.4 µm; B. 7 µm; C, D, 2.4 µm; E, 31 µm; F, 27 µm; G, 20 µm; H, 30 µm.

FIGURE 78 in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 78. Paucibranchia totospinata (Lu & Fauchald, 1998) n. comb., holotype NMWZ 1988.069.84. A, Parapodium 3; B. Parapodium 11; C. Parapodium 28; D. Parapodium 60; E. Parapodium 237; F. Parapodium 316. All in anterior view. Scale bars: A, E, F, 0.13 mm; B, D, 0.18 mm; C, 0.38 mm.

FIGURE 69 in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 69. Paucibranchia sp. 1., specimen ECOSUR-P2937. A. Parapodium 3; B. Parapodium 12; C. Parapodium 24; D. Compound spiniger, chaetiger 6; E. Compound falciger, long blade, chaetiger 12; F. Compound falciger, short blade, chaetiger 25; G. Subacicular hook, chaetiger 25; H. Isodonts pectinate, chaetiger 6. Parapodia in anterior view. Scale bars: A, 0.15 mm; B, 0.22 mm; C, 69 µm; D, 7 µm; E, 35 µm; F, 20 µm; G, 10.5 µm; H, 7.7 µm.

FIGURE 65 in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 65. Paucibranchia sinensis (Monro, 1934) n. comb., topotype USNM 22516. A. Parapodium 3; B. Parapodium 12, dorsal cirri broken; C. Parapodium 25; D. Parapodium 42; E. Parapodium 55. All in anterior view. Scale bars: A, B, 0.1 mm; C– E, 0.2 mm.

FIGURE 76 in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 76. Paucibranchia totospinata (Lu & Fauchald, 1998) n. comb., holotype NMWZ 1988.069.84. A. Anterior end, dorsal view; B. Anterior end, ventral view; C. Anterior end with branchiae, dorsal view; D. Pygidium, ventral view. Scale bars: A–C, 2 mm; D, 1 mm.

FIGURE 58. Paucibranchia patriciae n in Morphological revision of the Subgroup 1 Fauchald, 1970 of Marphysa de Quatrefages, 1865 (Eunicidae: Polychaeta)

FIGURE 58. Paucibranchia patriciae n. sp., holotype USNM 90030. A. Parapodium 4; B. Parapodium 10; C. Parapodium 22; D. Parapodium 63; E. Parapodium 89, dorsal cirri broken. All in anterior view. Scale bars: A–D, 0.1 mm; E, 0.07 mm.