Hemitoma is a genus of slit limpets, marine gastropod molluscs in the family Fissurellidae, the keyhole limpets and slit limpets.Bouchet, P.; Rosenberg, G. (2012). Hemitoma Swainson, 1840. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=206771 on 2013-01-16
In this genus of fissurellid, there is an inconspicuous notch at the anterior end of the shell rather than a slit. The notch is best seen in an interior view of the shell.
Species Species within the genus Hemitoma include: Hemitoma australis (Quoy & Gaimard, 1832) Hemitoma bella Gabb, 1865
According to the World Register of Marine Species (WoRMS) the following species names have been accepted WoRMS : Hemitoma Hemitoma cumingii Sowerby II, 1863 Hemitoma imbricata (Adams, 1851) Hemitoma octoradiata (Gmelin, 1791) Hemitoma polygonalis (Adams, 1852)
The Indo-Pacific Molluscan Database also includes the following species with names in current use OBIS : Hemitoma Hemitoma arabica (Adams, 1852) Hemitoma modesta (Adams, 1872) Hemitoma subrugosa Thiele, 1916 Hemitoma simpla Christiaens, 1987 Subgenus Montfortia, Récluz, 1843 accepted as the genus Montfortia Récluz, 1843 Hemitoma cratitia (Adams, 1852) Subgenus Montfortista, Iredale, 1929 Hemitoma oldhamiana (Nevill, 1869)
Species brought into synonymy Hemitoma emarginata (Blainville, 1825): synonym of Montfortia emarginata (Blainville, 1825) Hemitoma excentrica (Iredale, 1929): synonym of Montfortista excentrica (Iredale, 1929) Hemitoma hermosa Lowe, 1935: synonym of Montfortia hermosa (Lowe, 1935) Hemitoma livescens (Reeve, 1865): synonym of Cellana livescens (Reeve, 1855) Hemitoma natlandi Durham, 1950: synonym of Octomarginula natlandi (Durham, 1950) Hemitoma panhi (Quoy & Gaimard, 1834): synonym of Montfortista panhi (Quoy & Gaimard, 1834) Hemitoma profunda (Deshayes, 1863): synonym of Eoacmaea profunda (Deshayes, 1863) Hemitoma rubida Verrill, 1850: synonym of Hemitoma octoradiata (Gmelin, 1791) Hemitoma subemarginata (Blainville, 1819): synonym of Montfortia subemarginata (Blainville, 1819) Hemitoma tricarinata (Born, 1778): synonym of Amathina tricarinata (Linnaeus, 1767)
References
Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). . XII, 195 pp. McLean J.H. (2011) Reinstatement of the fissurellid subfamily Hemitominae, with the description of new genera, and proposed evolutionary lineage, based on morphological characters of shell and radula (Gastropoda: Vetigastropoda). Malacologia 54(1-2): 407-427 ITIS Worms
nl:Emarginula