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Emarginula

Emarginula is a genus of small keyhole limpets, marine gastropod molluscs in the family Fissurellidae.[1]

Description

The oval shell is obliquely conical with a backward-pointing recurved apex. There is a deep incision in the anterior margin. A distinct anal fasciole extends upwards from this incision. The surface is latticed, sculptured with radial ribs. There is no septum inside.[2]

Radula

The radula has a dental formula of [many].1.4.1.4.1.[many],[3] with a wide, rectangular, acuspate rachidian tooth.[4]The various genera have a few dozen rows of teeth.[3]

Species

According to the World Register of Marine Species (WoRMS), species within the genus Emarginula include:[1]

The following species are mentioned in other databases : The Indo-Pacific Molluscan Database also mentions the following species with names in current use :[6]

Subgenus Emarginula Lamarck, 1801
Subgenus Emarginula (Subzeidora) Iredale, 1924
Species brought into synonymy
[1]

References

  1. ^ a b c Bouchet, P.; Gofas, S.; Rosenberg, G. (2012). Emarginula Lamarck, 1801. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138012 on 2013-01-13
  2. ^ Tryon, George W. Jr. (1879–1898). Manual of Conchology, structural and systematic. Academy of Natural Sciences, Philadelphia. p. 248.
  3. ^ a b Torr, Claude M. (1914). "Radulæ of some South Australian Gasteropoda". Transactions of the Royal Society of South Australia. 38: 362–368.
  4. ^ Keen, A. Myra (1971-06-01). Sea shells of tropical west America: marine mollusks from Baja California to Peru. ISBN 978-0-8047-0736-7.
  5. ^ "Emarginula striatula". Gastropods.com. Retrieved 12 January 2019.
  6. ^ OBIS : Emarginula