Hemitoma is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of slit limpet

Limpet

Limpet is a common name for a number of different kinds of saltwater and freshwater snails ; it is applied to those snails that have a simple shell which is more or less conical in shape, and either is not spirally coiled, or appears not to be coiled in the adult snails.The name limpet is most...

s, marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 gastropod molluscs in the family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Fissurellidae, the keyhole limpets and slit limpets.

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 and Gaimard, 1832)
• Hemitoma bella Gabb, 1865

According to the World Register of Marine Species

World Register of Marine Species

The World Register of Marine Species is a database that hopes to provide an authoritative and comprehensive list of names of marine organisms. The content of the registry is edited and maintained by scientific specialists on each group of organism. These taxonomists control the quality of the...

 (WoRMS) the following species names have been accepted

• Hemitoma cumingii
  Hemitoma cumingii
  Hemitoma cumingii is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets....
  
  G.B. Sowerby II, 1863
• Hemitoma emarginata
  Hemitoma emarginata
  Hemitoma emarginata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets....
  
  (Blainville, 1825)
• Hemitoma imbricata
  Hemitoma imbricata
  Hemitoma imbricata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets....
  
  (A. Adams, 1851)
• Hemitoma livescens
  Hemitoma livescens
  Hemitoma livescens is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.-Distribution:...
  
  (Reeve, 1865)
• Hemitoma octoradiata
  Hemitoma octoradiata
  Hemitoma octoradiata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets....
  
  (Gmelin, 1791)
• Hemitoma profunda
  Hemitoma profunda
  Hemitoma profunda is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets....
  
  (Deshayes, 1863)
• Hemitoma tricarinata
  Hemitoma tricarinata
  Hemitoma tricarinata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets....
  
  (Born, 1778)

The Indo-Pacific Molluscan Database also includes the following species with names in current use

• Hemitoma arabica (A. Adams, 1852)
• Hemitoma modesta (H. Adams, 1872)
• Hemitoma subrugosa Thiele, 1916
• Hemitoma simpla Christiaens, 1987

Subgenus Montfortia, Récluz, 1843

• Hemitoma subemarginata (Blainville, 1819)
• Hemitoma cratitia (A. Adams, 1852)

Subgenus Montfortista, Iredale, 1929

• Hemitoma panhi (Quoy & Gaimard, 1834)
• Hemitoma oldhamiana (Nevill, 1869)
• Hemitoma excentrica (Iredale, 1929)