Paradoris erythraeensis

Dayrat, Benoît, 2006, A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina), Zoological Journal of the Linnean Society 147 (2), pp. 125-238 : 155-157

PARADORIS ERYTHRAEENSIS ( FIGS 17A–C, 18–33 )

Discodoris erythraeensis Vayssière, 1912: 23–24 , figs 150–152. – Gohar & Abul-Ela, 1959: 52–59, plate I, fig. 3, plate III, figs 1–3.

Discodoris sp. 1 Gosliner, 1987: 64 , fig. 75.

Type material: Holotype, by monotypy: [Gulf of Aden], Djibouti, Baie de Tadjourah, [6 February 1904], one specimen 35/ 25 mm preserved, [leg. mission Charles Gravier] ( MNHN, no catalogue number). Vayssière dissected the type. Other malacologists may have reexamined it too. The radula is missing and probably lost. No slide was found at the MNHN. The reproductive system is present but in poor condition. In particular, it had been separated from the body wall and its distal part (with the accessory glands) was damaged.

Additional material dissected: South Africa, eastern side of the Cape Peninsula, Venus Pool , 6 January 1980, one specimen approximately 17/ 10 mm preserved, identified as Discodoris sp. by T. M. Gosliner ( SAM A32370) [this specimen is the voucher of Discodoris sp. 1 Gosliner, 1987 ; it was dissected prior to the present study; the radula and the jaws were mounted on two permanent slides available with the specimen; however, the slides have dried and are not fully informative]; TANZANIA, off Dar-es-Salaam, Mbudya , 7 September 1977, two specimens 14/9 (#1) and 8/4 (#2) mm preserved, [leg. unknown], identified as Discodoris by T. M. Gosliner ( CASIZ 074477 ) ; Tanzania, Mtwara Region, Msimbati , 30 m depth, 1 November 1994, one specimen 14/ 9 mm, leg. T. M. Gosliner, identified as Discodoris by T. M. Gosliner ( CASIZ 099390 ) ; PHILIPPINES, Luzon, Batangas Province, Maricaban Island, Bethlehem , 8 May 2001, 10 m depth, one specimen 20/ 11 mm preserved, leg. T. M. Gosliner, identified as Discodoris by T. M. Gosliner ( CASIZ 157029 ) .

Questionable and immature additional material dissected: [SUEZ CANAL], lac Amer , [collecting date unknown], two specimens 17/11 (#1) and 10/8 (#2) mm preserved, leg. Gruvel, identified as D. erythraeensis by A. Pruvot-Fol ( MNHN, no catalogue number) [the largest specimen (#1) was entirely dissected prior to the present study; no internal organs remain in the jar except for some pieces of the reproductive system – the prostate, part of the female gland mass, and the spermatic pouches are missing; the small specimen (#2) was also dissected prior to the present study; its reproductive system, either naturally absent or extracted by a previous worker, could not be found; I refer to these specimens as MNHN-Amer in order to avoid confusion with the holotype, also held by the MNHN]; THAILAND, Gulf of Thailand, Ko-Sichang, Hin- Tasan , 17 August 1966, one specimen 14/ 7 mm preserved, leg. F. B. Steiner, identified as Discodoris by T. M. Gosliner ( CASIZ 081807 ) ; INDONESIA, Malay Archipelago, Lesser Sunda Islands, Adonara Island , south end of island, 28 November 1995, one specimen 15/ 7 mm preserved, leg. Pauline Fiene, identified as Discodoris by T. M. Gosliner ( CASIZ 109846 ) .

Figures

Figure 17. Live animals (except for D). A, Paradoris erythraeensis, CASIZ 157029, total length (preserved) = 20 mm. B, P. erythraeensis, SAM A32370, total length (preserved) = 17 mm. C, P. erythraeensis, CASIZ 099390, total length (preserved) = 14 mm. D, P. liturata, dorsal view of the holotype, after Bergh (1905: plate XIV, fig. 15), total length (preserved) = 14 mm. E, P. liturata, CASIZ 097595 (probably #2), total length (preserved) = 27 (#2) mm. F, P. liturata, CASIZ 069612, total length (preserved) = 12 mm. G, P. liturata, CASIZ 113658, total length (preserved) = 16 mm. H, P. liturata, picture from CASIZ slide collection (specimen not found). Colour pictures by T.M. Gosliner.

Figure 18. Paradoris erythraeensis, holotype, MNHN. A, general view of the reproductive system, scale = 3 mm. B, distal part of the reproductive system with two accessory glands and one stylet sac, scale = 1.4 mm. C, one lateral jaw plate and the ventral jaw plate (the second lateral plate was missing), scale = 1.4 mm. D, mantle holes, scale = 0.7 mm.

Figure 19. Paradoris erythraeensis. A, anterior, ventral view, CASIZ 157029, scale = 3.4 mm. B, mantle holes, CASIZ 157029, scale = 0.7 mm. C, dorsal view, CASIZ 157029, scale = 5 mm. D, mantle holes, MNHN-Amer #1, scale = 0.9 mm. E, mantle holes and minute pigmentation, CASIZ 074477 #1, scale = 1.2 mm.

Figure 20. Paradoris erythraeensis. A, dorsal notum, SAM A32370, scale = 100 µm. B, dorsal notum, CASIZ 074477 #1, scale = 100 µm. C, dorsal notum, CASIZ 157029, scale = 100 µm. D, dorsal notum, CASIZ 099390, scale = 100 µm. E, dorsal notum, CASIZ 099390, scale = 20 µm. F, surface of a branchial plume, CASIZ 099390, scale = 20 µm. G, copulatory organ, CASIZ 099390, scale = 20 µm.

Figure 21. Paradoris erythraeensis. A, general, internal anatomy, CASIZ 157029, scale = 2 mm. B, part of the digestive system, SAM A32370, scale = 5 mm. C, three jaw plates, CASIZ 074477 #1, scale = 1 mm. D, three jaw plates, SAM A32370, scale = 0.9 mm. E, three jaw plates, CASIZ 157029, scale = 0.7 mm. F, central nervous system, dorsal view, CASIZ 157029, scale = 0.6 mm. G, central nervous system, dorsal view, CASIZ 099390, scale = 0.5 mm.

Figure 22. Paradoris erythraeensis, jaws and jaw rodlets. A, lateral jaw plate, CASIZ 099390, scale = 100 µm. B, CASIZ 099390, scale = 10 µm. C, CASIZ 099390, scale = 10 µm. D, CASIZ 074477 #1, scale = 20 µm. E, CASIZ 074477 #2, scale = 10 µm. F, CASIZ 074477 #2, scale = 10 µm.

Figure 23. Paradoris erythraeensis, jaws and jaw rodlets. A, lateral jaw plate, MNHN-Amer #2, scale = 100 µm. B, median, jaw plate, MNHN-Amer #2, scale = 100 µm. C, MNHN-Amer #2, scale = 20 µm. D, MNHN-Amer #2, scale = 10 µm. E, lateral jaw plate, CASIZ 157029, scale = 100 µm. F, CASIZ 157029, scale = 20 µm.

Figure 24. Paradoris erythraeensis. A, radular rows, CASIZ 074477 #1, scale = 100 µm. B, innermost radular teeth, CASIZ 074477 #1, scale = 30 µm. C, radular rows, CASIZ 074477 #2, scale = 20 µm. D, right, outermost teeth, CASIZ 074477 #2, scale = 20 µm. E, left, outermost teeth, CASIZ 074477 #2, scale = 10 µm. F, left, lateral teeth, CASIZ 074477 #2, scale = 10 µm.

Figure 25. Paradoris erythraeensis. A, left, outermost teeth, MNHN-Amer #2, scale = 20 µm. B, right rows, CASIZ 099390, scale = 20 µm. C, left, outermost teeth, CASIZ 099390, scale = 10 µm. D, right, outermost teeth, CASIZ 099390, scale = 20 µm. E, right, innermost teeth, CASIZ 157029, scale = 10 µm. F, right rows, CASIZ 157029, scale = 30 µm.

Figure 26. Paradoris erythraeensis, reproductive system. A, general view (fgm not represented entirely), SAM A32370, scale = 1 mm. B, general view, CASIZ 157029, scale = 1.6 mm. C, distal part of the reproductive system with two stylet sacs and two accessory glands, CASIZ 157029, scale = 0.6 mm. D, receptaculum seminis and spermatic ducts, CASIZ 157029, scale = 1.4 mm.

Figure 27. Paradoris erythraeensis, reproductive system. A, general view, CASIZ 099390, scale = 1 mm. B, distal part with two accessory glands and two stylet sacs, CASIZ 099390, scale = 0.45 mm. C, spermatic pouches and ducts, CASIZ 099390, scale = 0.9 mm. D, distal part with two possible stylet sacs (only one sac visible on this side), CASIZ 074477 #2, scale = 0.6 mm. E, distal part with two possible stylet sacs, CASIZ 074477 #2, scale = 0.6 mm. F, general view (only one stylet sac visible), CASIZ 074477 #1, scale = 1.5 mm. G, distal part with two accessory glands and two stylet sacs, CASIZ 074477 #1, scale = 0.9 mm.

Figure 28. Paradoris erythraeensis, CASIZ 109846. A, dorsal notum, scale = 100 µm. B, dorsal notum, scale = 20 µm. C, wide hole, scale = 10 µm. D, median jaw, scale = 100 µm. E, jaw rodlets, scale = 10 µm. F, jaw rodlets, scale = 20 µm.

Figure 29. Paradoris erythraeensis, CASIZ 081807. A, jaw rodlets, scale = 20 µm. B, jaw rodlets, scale = 10 µm. C, dorsal notum, scale = 20 µm. D, right, outermost teeth, scale = 20 µm. E, left rows, scale = 30 µm. F, right rows, scale = 20 µm.

Figure 30. Paradoris erythraeensis, radula, CASIZ 109846. A, radular rows, scale = 100 µm. B, right rows, scale = 20 µm. C, left, outermost tooth, scale = 10 µm. D, left, outermost tooth, scale = 10 µm.

Figure 31. Paradoris erythraeensis, CASIZ 081807. A, three jaw plates, scale = 1 mm. B, general view of the reproductive system, scale = 1.1 mm. C, general view of the reproductive system, scale = 1 mm. D, spermatic pouches and ducts, scale = 0.45 mm. E, mantle holes, scale = 0.5 mm.

Figure 32. Paradoris erythraeensis, reproductive system, CASIZ 109846. A, general view (rs moved), scale = 1 mm. B, general view, scale = 1 mm.

Figure 33. Paradoris erythraeensis, reproductive system, MNHN-Amer #1. A, distal part (the rest was missing), scale = 1 mm. B, two accessory glands and two stylet sacs (just one sac visible on this side), scale = 1.1 mm. C, two accessory glands and two stylet sacs (just one sac visible on this side), scale = 0.9 mm.