Ondina

Ondina is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.

Description
The thin shell has an oval shape. The whorls of the teleoconch are smooth or spirally striated. The columellar tooth is obsolete.

Species
Species within the genus Ondina include:
 * Ondina anceps (Gaglini, 1992)
 * Ondina coarctata (Sars G.O., 1878)
 * Ondina crystallina Locard, 1892
 * Ondina diaphana (Jeffreys, 1848)
 * Ondina dilucida (Monterosato, 1884)
 * Ondina divisa (Adams J., 1797)
 * Ondina elachisinoides Hori & Fukuda, 1999
 * Ondina fragilissima Peñas & Rolán, 2002
 * Ondina jansseni van Aartsen & Menkhorst, 1996
 * Ondina modiola (Monterosato, 1884)
 * Ondina mosti (van Aartsen, Gittenberger & Goud, 1998)
 * Ondina neocrystallina Gaglini, 1991
 * Ondina normani (Friele, 1886)
 * Ondina obliqua (Alder, 1844)
 * Ondina perezi (Dautzenberg & Fisher, 1925)
 * Ondina scandens (Monterosato, 1884)
 * Ondina strufaldii Peñas & Rolán, 1999
 * Ondina vitrea (Brusina, 1866)
 * Ondina warreni (Thompson W., 1845)