Hyala

(Original description) The head of the animal is elongated and emarginate at the tip, forming two distinct lobes. The tentacles are flattened, lacking a club-shaped tip, and possess fine setae at their extremities. The eyes are sessile and located centrally on the base of each tentacle. The foot is simple posteriorly. The opercular lobe lacks a caudal cirrus. The shell is hyaline (transparent). ^[2]

They are subsurface deposit feeders.

Species within the genus Hyala include:

• Hyala adamsi Golikov & Kussakin in Golikov & Scarlato, 1971
• Hyala bella (A. Adams, 1853)
• † Hyala fragila Dockery, 1993
• Hyala vitrea (Montagu, 1803)

Species brought into synonymy

• † Hyala laevigatoidea Gründel, 1993: synonym ofs † Usedomella laevigatoidea (Gründel, 1993 (superseded combination)
• Hyala mediterranea F. Nordsieck, 1972: synonym of Hyala vitrea (Montagu, 1803)
• Hyala pumila A. Adams, 1870: synonym of Microdryas pumila (A. Adams, 1870) (superseded combination)

• Ponder W. F. (1984) A review of the genera of the Iravadiidae (Gastropoda: Rissoacea) with an assessment of the relationships of the family. Malacologia 25(1): 21-71. page(s): 51-52
• Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). ISBN 0-915826-22-4. XII, 195 pp.
• Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213

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