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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropoda
Subclassis: Vetigastropoda
Ordo: Lepetellida
Superfamilia: Fissurelloidea

Familia: Fissurellidae
Subfamilia: Zeidorinae
Genus: Hemitoma
Species (5): H. cumingii – H. imbricata – H. lamberti – H. octoradiata – H. polygonalis

Hemitoma Swainson, 1840

Typetaxon: Emarginula tricostata G. B. Sowerby I, 1823 accepted as Hemitoma octoradiata (Gmelin, 1791) (type by monotypy)


Subemarginula Gray, 1847


Hemitoma (Fissurellidae) in the World Register of Marine Species

Hemitoma is a genus of slit limpets, marine gastropod molluscs in the family Fissurellidae, the keyhole limpets and slit limpets.[1]

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 within the genus Hemitoma include:[2]

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 [3]

Hemitoma cumingii Sowerby, 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 [4]

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)


Bouchet, P.; Rosenberg, G. (2012). Hemitoma Swainson, 1840. Accessed through: World Register of Marine Species at on 2013-01-16
WoRMS : Hemitoma

OBIS : Hemitoma

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 [1]
Worms [2]

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