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FIG. 13 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 13. — Drawing of H. orstomi n. sp. reproductive morphology. Abbreviations: am, ampulla; bc, bursa copulatrix; ej, ejaculatory duct; fgm, female gland mass; gap, genital atrium pigment; p, penis; pr, prostate; rs, receptaculum seminis; v, vagina; vs, vaginal sphincter. Scale: 20 ×.

FIG. 15 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 15. — Electron micrographs of radula, deep-sea Halgerda brunneomaculata (MNHN CP1364); A, outer lateral teeth; B, outer lateral teeth; C, inner lateral teeth; D, middle lateral teeth. Scale bars: A, 25 µm; B, 15 µm; C, 75 µm; D, 60 µm.

FIG. 11. — Halgerda orstomi n in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 11. — Halgerda orstomi n. sp., preserved specimen (MNHN MUSORSTOM 8 CP1140); A, dorsal view; B, ventral view. Scale bar: 2.5 mm.

FIG. 12 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 12. — Electron micrographs of H. orstomi n. sp. (MNHN MUSORSTOM 8 CP1140), radular morphology; A, outer lateral teeth; B, outer lateral teeth; C, inner lateral; D, middle lateral teeth. Scale bars: A, C, 30 µm; B, 20 µm; D, 43 µm.

FIG. 10 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 10. — Drawing of H. azteca n. sp. reproductive morphology. Abbreviations: am, ampulla; bc, bursa copulatrix; ej, ejaculatory duct; fgm, female gland mass; ga, genital atrium; p, penis; pr, prostate; rs, receptaculum seminis; v, vagina; vs, vaginal sphincter. Scale: 10 ×.

FIG. 9 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 9. — Electron micrographs of H. azteca n. sp. (MNHN SMIB 8 DW182-184), radular morphology; A, outer lateral teeth; B, inner lateral teeth; C, middle lateral teeth; D, middle lateral teeth. Scale bars: A, B, 60 µm; C, D, 150 µm.

FIG. 8. — Halgerda azteca n in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 8. — Halgerda azteca n. sp., preserved specimen (MNHN SMIB 8 DW182-184); A, dorsal view; B, ventral view. Scale bar: 3 mm.

FIG. 7 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 7. — Drawing of H. abyssicola n. sp., reproductive morphology. Abbreviations: am, ampulla; bc, bursa copulatrix; ej, ejaculatory duct; fgm, female gland mass; ga, genital atrium; p, penis; pr, prostate; rs, receptaculum seminis; v, vagina. Scale: 7.5 ×.

FIG. 4 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 4. — Drawing of H. fibra n. sp., reproductive morphology. Abbreviations: am, ampulla; bc, bursa copulatrix; ej, ejaculatory duct; fgm, female gland mass; ga, genital aperture; p, penis; pr, prostate; rs, receptaculum seminis; v, vaginal sphincter. Scale: 7.5 ×.

FIG. 5. — Halgerda abyssicola n in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 5. — Halgerda abyssicola n. sp., preserved animal, (MNHN MUSORSTOM 8 CP1132); A, dorsal view; B, ventral view. Scale bar: 4 mm.

FIG. 6 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 6. — Electron micrographs of H. abyssicola n. sp. (MNHN MUSORSTOM 8 CP1084), radular morphology; A, outer lateral teeth; B, inner lateral teeth; C, middle lateral teeth; D, middle lateral teeth. Scale bars: A, 75 µm; B, 150 µm; C, 75 µm; D, 100 µm.

FIG. 3 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 3. — Electron micrographs of H. fibra n. sp. (MNHN MUSORSTOM 3 CP134) radular morphology; A, outer lateral teeth; B, inner lateral teeth; C, middle lateral teeth; D, middle lateral teeth. Scale bars: A, 43 µm; B, C, 100 µm; D, 150 µm.

FIG. 1 in New records of Halgerda Bergh, 1880 (Opisthobranchia, Nudibranchia) from the deep western Pacific Ocean, with descriptions of four new species

FIG. 1. — Photos of new Halgerda species from the deep sea; A, Halgerda fibra n. sp., living animal, dorsal view (MNHN BATHUS 3); B, Halgerda fibra n. sp., preserved animal, ventral view (MNHN BATHUS 3); C, Halgerda fibra n. sp., living animal, dorsal view (MNHN CHALCAL 2 CP20); D, Halgerda abyssicola n. sp., living animal, dorsal view (MNHN MUSORSTOM 8 CP1132). Scale bar: A, B, 5 mm; C, 2 mm; D, 3 mm.

FIG. 118. — A in Ascidians from the tropical western Pacific

FIG. 118. — A, Eudistoma sp.; B, Polycitor giganteus (Herdman, 1899); C, Polycitor translucidus Kott, 1957; D, Polycitorella coronaria Monniot F., 1988; E, Polycitorella mariae Michaelsen, 1924; F, Polycitorella stellifera n. sp.

FIG. 126. — A in Ascidians from the tropical western Pacific

FIG. 126. — A,?Phallusia obesa (Herdman, 1880); B, Phallusia philippinensis Millar, 1975; C, Phallusia sp.; D, Botryllus perspicuus (Herdman, 1886); E, Botryllus tyreus (Herdman, 1886); F, Eusynstyela hartmeyeri Michaelsen, 1904.

FIG. 116. — A in Ascidians from the tropical western Pacific

FIG. 116. — A, Clavelina robusta Kott, 1990; B, Citorclinum laboutei Monniot F. & Millar, 1988; C, Cystodytes hapu Monniot C. & Monniot F., 1987; D, Eudistoma album Monniot F., 1988; E, Eudistoma fluorescens n. sp.; F, Eudistoma fucatum n. sp.

FIG. 128. — A in Ascidians from the tropical western Pacific

FIG. 128. — A, Polycarpa argentata (Sluiter, 1890); B, Polycarpa camptos n. sp. covered by a black didemnid; C, Polycarpa captiosa (Sluiter, 1885); D, Polycarpa cryptocarpa (Sluiter, 1885); E, Polycarpa nigerrima n. sp.; F, Polycarpa papillata (Sluiter, 1885).

FIG. 110. — Microcosmus vesiculosus n in Ascidians from the tropical western Pacific

FIG. 110. — Microcosmus vesiculosus n. sp.; A, B, left and right sides of the body; C, body ventrally opened. Scale bars: 1 cm.

FIG. 109. — Microcosmus pacificus n in Ascidians from the tropical western Pacific

FIG. 109. — Microcosmus pacificus n. sp.; A, B, left and right sides of the body; C, body ventrally opened; D, dorsal tubercle; E, gonad. Scale bars: A, B, 1 cm; C, 5 mm; D, E, 2 mm.

FIG. 112. — A, Aplidium breviventer n in Ascidians from the tropical western Pacific

FIG. 112. — A, Aplidium breviventer n. sp.; B, Aplidium cerebrum n. sp.; C, Aplidium intextum n. sp.; D, Aplidium longithorax Monniot F., 1987; E, Aplidium macrolobatum Kott, 1992; F, Aplidium nadaense (Nishikawa, 1980).