Borsonia

Borsonia is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.

Description
The fusiform shell has medium to small size. It has an elevated spire and a well-marked siphonal canal. The whorls of the spire are usually angulated near the middle. On this angle they show elongated nodes or axial ribs. These nodes disappear almost completely at the last section of the body whorl. The sutures are distinct. The aperture is elongate and is about half as long as the shell. The simple outer lip curves back near the top and forms a deep notch. The columella is nearly straight and has none, one or two strong plications on the upper half. The anal sinus of the outer lip is not deep The sinus area between and the strong sutural cord are well excavated. There is an opening in the infrasutural depression of the body whorl.

Distribution
At considerable depths in the subtropical and temperate waters of the Pacific Ocean and the Atlantic Ocean; in shallower boreal waters.

Species
Species within the genus Borsonia include:
 * Borsonia armata Boettger, 1895
 *  Borsonia brasiliana Tippett, 1983
 * Borsonia ceroplasta (Watson, 1881)
 * † Borsonia cliffdenensis H. Finlay, 1930
 * † Borsonia crassiaxialis Maxwell, 1992
 * Borsonia epigona Martens, 1901
 * Borsonia hirondelleae (Dautzenberg, 1891)
 * Borsonia jaffa Cotton, 1947
 * Borsonia jaya Sysoev, 1997
 * † Borsonia meridionalis Lozouet, 2017
 * † Borsonia mitromorphoides Suter, 1917
 * Borsonia ochracea Thiele, 1925
 * † Borsonia prima Bellardi, 1839
 * † Borsonia pulchra Peyrot, 1931
 * Borsonia saccoi Dall, 1908
 * Borsonia silicea (Watson, 1881)
 * Borsonia smithi Schepman, 1913
 * Borsonia symbiophora Sysoev, 1996
 * Borsonia symbiotes (Wood-Mason & Alcock, 1891)
 * Borsonia syngenes (Watson, 1881)
 * Borsonia timorensis (Schepman, 1913)
 * † Borsonia zelandica (P. Marshall, 1919)
 * Species brought into synonymy:
 * Borsonia agassizii Dall, 1908 : synonym of Borsonella agassizii (Dall, 1908)
 * Borsonia bifasciata Pease, 1860 : synonym of Kermia bifasciata (Pease, 1860)
 * † Borsonia brachyspira Suter, 1917 : synonym of † Mitromorpha brachyspira (Suter, 1917)
 * Borsonia coronadoi Dall, 1908 : synonym of Borsonella coronadoi (Dall, 1908)
 * Borsonia crassicostata Pease, 1860 : synonym of Lienardia crassicostata (Pease, 1860)
 * Borsonia diegensis Dall, 1908 : synonym of Borsonella diegensis (Dall, 1908)
 * † Borsonia inculta Moody, 1916 : synonym of Pseudotaranis strongi (Arnold, 1903)
 * Borsonia lutea Pease, 1860 : synonym of Kermia lutea (Pease, 1860)
 * Borsonia nebulosa Pease, 1860 synonym of Pseudodaphnella nebulosa (Pease, 1860)
 * Borsonia rouaultii Dall, 1889 : synonym of Cordieria rouaultii (Dall, 1889)