{{Short description|Genus of gastropods}} {{Automatic taxobox | image = Hemitoma.jpg | image_caption = A shell of a ''Hemitoma'' species from New Zealand, anterior end to the bottom | taxon = Hemitoma | authority = Swainson, 1840 | subdivision_ranks = Species | subdivision = See text | synonyms = ''Subemarginula'' <small>Gray, 1847</small> | type_species= ''Emarginula tricostata'' <small>Sowerby I, 1823</small> }}
'''''Hemitoma''''' is a genus of slit limpets, marine gastropod molluscs in the family Fissurellidae, the keyhole limpets and slit limpets.<ref name="WoRMS">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</ref>
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:<ref>{{Cite web | url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=69618 | title=ITIS - Report: Hemitoma }}</ref> * ''Hemitoma australis'' <small>(Quoy & Gaimard, 1832)</small> * ''Hemitoma bella'' <small>Gabb, 1865</small>
According to the World Register of Marine Species (WoRMS) the following species names have been accepted <ref>[http://www.marinespecies.org/aphia.php?p=taxlist WoRMS : Hemitoma]</ref> * ''Hemitoma cumingii'' <small>Sowerby II, 1863</small> * ''Hemitoma imbricata'' <small>(Adams, 1851)</small> * ''Hemitoma octoradiata'' <small>(Gmelin, 1791)</small> * ''Hemitoma polygonalis'' <small>(Adams, 1852)</small>
The Indo-Pacific Molluscan Database also includes the following species with names in current use <ref>[http://clade.ansp.org/obis/search.php/5891 OBIS : Hemitoma]</ref> * ''Hemitoma arabica'' <small>(Adams, 1852)</small> * ''Hemitoma modesta'' <small>(Adams, 1872)</small> * ''Hemitoma subrugosa'' <small>Thiele, 1916</small> * ''Hemitoma simpla'' <small>Christiaens, 1987</small> ;Subgenus ''Montfortia'', <small>Récluz, 1843</small>: accepted as the genus ''Montfortia'' <small>Récluz, 1843</small> * ''Hemitoma cratitia'' <small>(Adams, 1852)</small> ; Subgenus ''Montfortista'', <small>Iredale, 1929</small> * ''Hemitoma oldhamiana'' <small>(Nevill, 1869)</small>
;Species brought into synonymy: * ''Hemitoma emarginata'' <small>(Blainville, 1825)</small>: synonym of ''Montfortia emarginata'' <small>(Blainville, 1825)</small> * ''Hemitoma excentrica'' <small>(Iredale, 1929)</small>: synonym of ''Montfortista excentrica'' <small>(Iredale, 1929)</small> * ''Hemitoma hermosa'' <small>Lowe, 1935</small>: synonym of ''Montfortia hermosa'' <small>(Lowe, 1935)</small> * ''Hemitoma livescens'' <small>(Reeve, 1865)</small>: synonym of ''Cellana livescens'' <small>(Reeve, 1855)</small> * ''Hemitoma natlandi'' <small>Durham, 1950</small>: synonym of ''Octomarginula natlandi'' (<small>Durham, 1950)</small> * ''Hemitoma panhi'' <small>(Quoy & Gaimard, 1834)</small>: synonym of ''Montfortista panhi'' <small>(Quoy & Gaimard, 1834)</small> * ''Hemitoma profunda'' <small>(Deshayes, 1863)</small>: synonym of ''Eoacmaea profunda'' <small>(Deshayes, 1863)</small> * ''Hemitoma rubida'' <small>Verrill, 1850</small>: synonym of ''Hemitoma octoradiata'' <small>(Gmelin, 1791)</small> * ''Hemitoma subemarginata'' <small>(Blainville, 1819)</small>: synonym of ''Montfortia subemarginata'' (<small>Blainville, 1819)</small> *'' Hemitoma tricarinata'' <small>(Born, 1778)</small>: synonym of ''Amathina tricarinata'' <small>(Linnaeus, 1767)</small>
==References== {{Commons category|Hemitoma}} {{Reflist}} * Vaught, K.C. (1989). ''A classification of the living Mollusca''. American Malacologists: Melbourne, FL (USA). {{ISBN|0-915826-22-4}}. 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 [https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=69618] * Worms [http://www.marinespecies.org/aphia.php?p=taxdetails&id=215221]
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Category:Fissurellidae