Phyllidia coelestis
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Familia: Phyllidiidae
Genus: Phyllidia
Name
Phyllidia coelestis Bergh, 1905 – Wikispecies link – Pensoft Profile
- Phyllidia coelestis. – Yonow et al. 2002[1]: 862, fig. 16b (Chagos) and references therein; Apte 2009[2]: 171, fig. 2r (Laccadive Islands).
- Phyllidia elegans. – Edmunds 1972[3]: 82, fig. 4b (Seychelles) (non Phyllidia elegans Bergh).
- Phyllidia varicosa. – Gosliner 1987[4]: 90, fig. 152 (South Africa) (non Phyllidia varicosa Lamarck).
- Phyllidia alia Yonow, 1984: 224 figs. 6C, D, 7A, 8F, G (Sri Lanka).
Material
Madagascar: 65 × 25 mm (PK-C), Ampangorina, Nosy Komba, 1 m depth on Acropora, 30 January 1992, leg. P Kemp. – Tanzania: photographs of two individuals, Mafia Island, shallow water, 15 January 2005 and 04 July 2005, A de Villiers. – Seychelles: 32 × 12 mm (PK-FF), Lilôt, NW Mahé, 15 m on encrusted coral, 26 April 1992, leg. P Kemp; 32 × 15 mm preserved (NHMUK acc. no. 2222), slightly curled, east side of East Channel, Aldabra, 1 m depth in coral, 25 September 1967, leg. JD Taylor; 49 × 15 mm preserved (NHMUK acc. no. 2222), Passe Femme, Aldabra, in shallow water beneath coral, 29 November 1967, leg. JD Taylor. – Maldives: 23 × 11 mm preserved (NHMUK ref. M/02/B/42), Gan, 04 September 1964, PSD Maldive Islands Expedition. – La Réunion and Mayotte: numerous individuals photographed, 20-45 mm in length http://seaslugs.free.fr/nudibranche/a_intro.htm.
Description
Ground colour granular blue-white with three black lines: median line containing orange-tipped tubercles, two smooth lateral lines. Lateral lines normally meet anteriorly, and extend to margin usually as U-shape, but remain separated posteriorly. Outside the black lines, mantle bears tubercles, black flecks, and smaller scattered pustules toward edge; larger tubercles may have orange tips. Rhinophores bright orange, up to 16 lamellae; row of orange tubercles originates behind each rhinophore. Ventrally, propodium notched or deeply concave; all specimens have long tapering oral tentacles, grooved laterally and bearing black pigment on dorsal surfaces extending ventrally onto bases.
Distribution/Remarks
These specimens and photographed individuals belong to the typical form of Phyllidia coelestis, a commonly recorded species in the western Indian Ocean and occurring as far south as South Africa. Another group of specimens also identified as Phyllidia coelestis (Brunckhorst 1989[5], 1993[6]; Yonow 2011[7] as dark form) has a central oval region where the ground colour is black and only a marginal band around it is blue-white. The edge of the central black area is irregular and may form short rays extending a little way into the blue-white margin, identical to that of Phyllidia (Fryeria) picta (p. 56), but this form has not been found in the western Indian Ocean.
Taxon Treatment
- Yonow, N; 2012: Opisthobranchs from the western Indian Ocean, with descriptions of two new species and ten new records (Mollusca, Gastropoda) ZooKeys, 197: 1-130. doi
Other References
- ↑ Yonow N, Anderson R, Buttress S (2002) Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean. Journal of Natural History 36: 831-882. doi: 10.1080/00222930110039161
- ↑ Apte D (2009) Opisthobranch fauna of Lakshadweep Islands, India, with 52 new records to Lakshadweep and 40 new records to India: part 1. Journal Bombay Natural History Society 106 (2): 162-175.
- ↑ Edmunds M (1972) Opisthobranchiate Mollusca from the Seychelles, Tanzania, and the Congo, now in the Tervuren Museum. Revue Zoologie Botanie Africaines 85(1–2): 67-92.
- ↑ Gosliner T (1987) Nudibranchs of Southern Africa. A guide to Opisthobranch molluscs of Southern Africa. EJ Brill, Leiden, Netherlands, 136 pp.
- ↑ Brunckhorst D (1989) Redescription of Phyllidia coelestis Bergh, 1905 (Opisthobranchia: Nudibranchia: Doridoidea). Journal of the Malacological Society of Australia 10: 35-45.
- ↑ Brunckhorst D (1993) The systematics and phylogeny of phyllidiid nudibranchs (Doridoidea). Records Australian Museum suppl. 16: 1-107.
- ↑ Yonow N (2011) Results of the Rumphius Biohistorical Expedition to Ambon (1990) Part 15. The sub-order Doridina (Mollusca, Gastropoda, Opisthobranchia, Nudibranchia). Zoologische Mededelingen, Leiden 85: 905–956. http://www.zoologischemededelingen.nl/85/nr04/a17
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