Hemitoma

Hemitoma
A shell of a Hemitoma species from New Zealand, anterior end to the bottom
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Lepetellida
Family:	Fissurellidae
Subfamily:	Hemitominae
Genus:	Hemitoma Swainson, 1840
Type species
Emarginula tricostata Sowerby, 1823
Species
See text
Synonyms
Subemarginula Gray, 1847

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

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)

References

1. 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
2. "ITIS - Report: Hemitoma".
3. WoRMS : Hemitoma
4. 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]