Abstract
In this study we list and figure a total of 22 species assigned to the genus Ilanga Herbert, 1987 that were collected during recent Paris Museum expeditions, of which 16 are new and described here (listed in the order they appear in the text): Ilanga herberti n. sp., I. euryomphalos n. sp., I. polygramma n. sp., I. stephanophora n. sp., I. harrytaylori n. sp., I. eurystoma n. sp., I. oxeia n. sp., I. cosmia n. sp., I. corrineae n. sp., I. comes n. sp., I. dongshaensis n. sp., I. philia n. sp., I. helicoides n. sp., I. lauensis n. sp., I. mesembrine n. sp. and I. boreia n. sp.. These species occur throughout the Indo-West Pacific, extending the known range of this genus beyond the south west Indian Ocean. We also synonymise Microgaza fulgens Dall, 1907 and Microgaza konos Vilvens, 2009 (syn. nov.) (as I. fulgens). New combinations include Ilanga fulgens and I. navakaensis.
References
Bouchet, P., Héros, V., Lozouet, P. & Maestrati, P. (2008) A quarter-century of deep-sea malacological exploration in the South and West Pacific: Where do we stand? How far to go? In: Héros, V., Cowie, R.H. & Bouchet, P. (Eds.), Tropical Deep-Sea Benthos 25. Mémoires du Muséum national d’Histoire naturelle, 196, pp. 9–40.
Dall, W.H. (1907) Descriptions of new species of shells, chiefly Buccinidae, from the dredgings of the U.S.S. «ALBATROSS» during 1906, in the northwestern Pacific, Bering, Okhotsk and Japanese seas. Smithsonian miscellaneous collections, 50 (2), 139–173.
Dall, W.H. (1925) Illustrations of unfigured types of shells in the collection of the United States National Museum. Proceedings of the United States National Museum, 66 (17), 1–41, 36 pls.
https://doi.org/10.5479/si.00963801.66-2554.1
Darriba, D., Taboada, G.L., Doallo, R. & Posada, D. (2012) jModelTest 2: more models, new heuristics and parallel computing. Nature Methods, 9, 772. https://doi.org/10.1038/nmeth.2109
Herbert, D.G. (1987) Revision of the Solariellinae in Southern Africa. Annals of the Natal Museum, 28 (2), 283–382.
Huelsenbeck, J.P. & Ronquist, F. (2001) MRBAYES: Bayesian inference of phylogeny. Bioinformatics, 17, 754–755.
https://doi.org/10.1093/bioinformatics/17.8.754
Higo, S., Callomon, P. & Goto, Y. (2001) Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan.Gastropoda, Bivalvia, Polyplacophora, Scaphopoda. Type Figures. Elle Publications, Osaka, 208 pp.
Kaicher, S.D. (1986) Card catalogue of world-wide shells. Pack No. 50. Trochidae. S.D. Kaicher, St Petersburg and Florida, ii + 43 cards. [cards i–ii + 4518–4623]
Kilburn, R.N. (1973) Notes on some benthic Mollusca from Natal and Mozambique, with descriptions of new species and subspecies of Calliostoma, Solariella, Latiaxis, Babylonia, Fusinus, Bathytoma and Conus. Annals of the Natal Museum, 21, 557–578.
Kuroda, T., Habe, T. & Oyama, K. (1971) The sea shells of Sagami Bay. Maruzen Co., Tokyo, xix + 741 pp. (Japanese text), 489 pp. (English text), 51 pp. (Index), 121 pls.
Ladd, H.S. (1982) Ceneozoic fossil mollusks from western Pacific islands; gastropods (Eulimidae and Volutidae through Terebridae). United States Geological Survey Professional Paper, 1171, 1–100.
https://doi.org/10.3133/pp1171
Marshall, B.A. (1999) A revision of the Recent Solariellinae (Gastropoda: Trochoidea) of the New Zealand region. The Nautilus, 113 (1), 4–42.
https://doi.org/10.5962/bhl.part.2016
Martens, E.von. (1881) Ueber mehrere neue Conchylien, theils aus Central-Asien, theils von S.M. Schiff Gazelle. Sitzungs- Berichte der Gesellschaft naturforschender Freunde zu Berlin, 19 April 1881, 63–67.
Martens, E.von. (1902) Einige neue Arten von Meer-Conchylien aus den Sammlungen der deutschen Tiefsee-Expedition unter der Leitung von Prof. Carl Chun, 1898–99. Sitzungs-Berichte der Gesellschaft naturforschender Freunde zu Berlin, 1902, 237–244.
Poppe, G.T., Tagaro, S.P. & Dekker, H. (2006) The Seguenziidae, Chilodontidae, Trochidae, Calliostomatidae and Solariellidae of the Philippine Islands. Visaya, Supplement 2, 1–228.
Rafinesque, C.S. (1815) Analyse de la nature,ou tableau de l’univers et des coprs organisés. Aux dépens de l’auteur, Palermo, 224 pp.
https://doi.org/10.5962/bhl.title.106607
Ronquist, F. & Huelsenbeck, J.P. (2003) MrBayes 3: Bayesian phylogenetic inference under mixed models. Bioinformatics, 19, 1572–1574.
https://doi.org/10.1093/bioinformatics/btg180
Sasaki, T. (2000) Trochidae. In: Okutani, T. (Ed.), Marine Mollusks in Japan. Tokai University Press, Tokyo, pp. 54–83.
Schepman, M.M. (1908) The Prosobranchia of the Siboga expedition, Part I: Rhipidoglossa and Docoglossa. Siboga expeditie monograph 49a. Brill, Leiden, 107 pp., 9 pls.
https://doi.org/10.5962/bhl.title.50521
Sowerby, G.B. (III) (1903) Mollusca of South Africa. Marine Investigations in South Africa, 2, 213–232.
Sumner-Rooney, L., Sigwart, J.D., McAfee, J., Smith, L. & Williams, S.T. (2016) Repeated eye reduction events reveal multiple pathways to degeneration in a family of marine snails. Evolution, 70–10, 2268–2295.
https://doi.org/10.1111/evo.13022
Thiele, J. (1925) Gastropoda der Deutschen Tiefsee-Expedition, II. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer “Valdivia”, 1898–1899, 17 (2), 35–382, pls. 13–46. [Gustav Fischer, Jena, Dual pagination;also numbered 1–348, pls. 1–34]
Vilvens, C. (2009) New species and new records of Solariellidae (Gastropoda: Trochoidea) from Indonesia and Taiwan. Novapex, 10 (3), 69–96.
Vilvens, C., Williams, S.T, & Herbert, D.G. (2014) New genus Arxellia with new species of Solariellidae (Gastropoda: Trochoidea) from New Caledonia, Papua New Guinea, Philippines, Western Australia, Vanuatu and Tonga. Zootaxa, 3826 (1), 255–281.
https://doi.org/10.11646/zootaxa.3826.1.8
Williams, S.T., Karube, S. & Ozawa, T. (2008) Molecular systematics of Vetigastropoda: Trochidae. Turbinidae and Trochoidea redefined. Zoologica Scripta, 37, 483–506.
https://doi.org/10.1111/j.1463-6409.2008.00341.x
Williams, S.T., Smith, L.M., Herbert, D.G., Marshall, B.A., Warén, A., Kiel, S., Dyal, P., Linse, K., Vilvens, C. & Kano, Y. (2013) Cenozoic climate change and diversification on the continental shelf and slope: evolution of gastropod diversity in the family Solariellidae (Trochoidea). Ecology and Evolution, 3 (4), 887–917.
https://doi.org/10.1002/ece3.513