Finella pupoides

The shell size varies between 2 mm and 4 mm. Its color varies from white to pale yellow, a few times even dark brown. The shell shows typically two indistinct brown bands below the suture and at the base. The shell is elongate, fusiform with a narrow, pointed apex. This protoconch is smooth and contains about 2.5 whorls. The whorls are rather inflated and have deeply marked sutures. The sculpture of the teleoconch has characteristic flat-topped spiral cords with rather weak axial ribs. These form a fine reticulate pattern on the upper whorls. This axial sculpture is reduced to absent on the body whorl. The aperture is semicircular. The narrow columella is curved.[3]

This species occurs in the Indian Ocean along Réunion and in the Pacific Ocean in Southeast Asia and Japan; and as non-indigenous marine species through the Suez Canal in European waters and the Mediterranean Sea

This species is found in sand or on mud in the sublittoral zone of bays at a depth of 10 m. Live species are rare and this species can be regarded as an endangered species.[3]

• Adams A. (1860) On some new genera and species of Mollusca from Japan. Annals and Magazine of Natural History, (3)5: 299-303
• Dautzenberg, Ph. (1929). Contribution à l'étude de la faune de Madagascar: Mollusca marina testacea. Faune des colonies françaises, III(fasc. 4). Société d'Editions géographiques, maritimes et coloniales: Paris. 321-636, plates IV-VII pp.
• Laseron C.F. (1956) The families Rissoinidae and Rissoidae (Mollusca) from the Solanderian and Dampierian zoogeographical provinces. Australian Journal of Marine and Freshwater Research 7(3): 384-484. [October 1956] page(s): 463
• Hasegawa K. (1998) A review of Recent Japanese species previously assigned to Eufenella and Clathrofenella (Mollusca: Gastropoda: Cerithioidea). Memoiurs of the National Science Museum, Tokyo 31: 165-186
• 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
• Streftaris, N.; Zenetos, A.; Papathanassiou, E. (2005). Globalisation in marine ecosystems: the story of non-indigenous marine species across European seas. Oceanogr. Mar. Biol. Annu. Rev. 43: 419-453

• Melvill J.C. & Standen R. (1896) Notes on a collection of shells from Lifu and Uvea, Loyalty Islands, formed by the Rev. James and Mrs. Hadfield, with list of species. Part II. Journal of Conchology 8: 273-315, page(s): 309, pl. 11 fig. 69