title: Ondina
text: # 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 The columellar tooth is obsolete.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)
  