Emarginula

Emarginula
Emarginula striatula
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Vetigastropoda
Superfamily: Fissurelloidea
Family: Fissurellidae
Genus: Emarginula
Lamarck, 1801
Species

See text.
Synonyms
  • Emarginella Pilsbry in Tryon & Pilsbry, 1891
  • Emarginulus Montfort, 1810
  • Entomella Cotton, 1945
  • Notamella Cotton, 1957

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

Contents

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.[1]

Radula

The radula has a dental formula of [many].1.4.1.4.1.[many],[2] with a wide, rectangular, acuspate rachidian tooth.[3] The various genera have a few dozen rows of teeth.[4]

Species

According to the World Register of Marine Species (WoRMS), species within the genus Emarginula include:[5]

The following species is mentioned in other databases :

The Indo-Pacific Molluscan Database also mentions the following species with names in current use :[7]

  • Emarginula adamsiana Sowerby II in Adams & Sowerby II, 1863
  • Emarginula amyda Shikama, 1962
  • Emarginula choristes Dall, 1925
  • Emarginula compta Habe, 1953
  • Emarginula concinna A. Adams, 1852
  • Emarginula crassicostata Sowerby II in Adams & Sowerby II, 1863
  • Emarginula curvata Schepman, 1908
  • Emarginula dilecta A. Adams, 1852
  • Emarginula dubia Schepman, 1908
  • Emarginula fenestrella Deshayes, 1863
  • Emarginula fragilis Yokoyama, 1920
  • Emarginula fulginea A. Adams, 1851
  • Emarginula hataii Habe, 1953
  • Emarginula hosoyai Habe, 1953
  • Emarginula imaizumi Dall, 1926
  • Emarginula japonica Sowerby II in Adams & Sowerby II, 1863
  • Emarginula kashimaensis Shikama, 1962
  • Emarginula maculata A. Adams in A. Adams & Sowerby II, 1863
  • Emarginula multisquamosa Schepman, 1908
  • Emarginula paucipunctata Schepman, 1908
  • Emarginula punctata A. Adams, 1852
  • Emarginula regia Habe, 1953
  • Emarginula sublaevis Schepman, 1908
  • Emarginula teramachii Habe, 1953
  • Emarginula textilis Gould, 1859 in 1859-61
  • Emarginula tosaensis Habe, 1953
Subgenus Emarginula Lamarck, 1801
  • Emarginula agulhasensis Thiele, 1925
  • Emarginula bellula A. Adams, 1851
  • Emarginula bicancellata Montrouzier, 1860
  • Emarginula camilla Melvill & Standen, 1903
  • Emarginula candida A. Adams, 1852
  • Emarginula clathrata Pease, 1862
  • Emarginula clypea A. Adams, 1852
  • Emarginula connelli Kilburn, 1978
  • Emarginula convexa Hedley, 1907
  • Emarginula cucullata Adams, 1851
  • Emarginula curvamen Iredale, 1925
  • Emarginula eximia A. Adams, 1852
  • Emarginula fissurata A. Adams, 1851
  • Emarginula gabensis (Gabriel, 1961)
  • Emarginula harmilensis Sturany, 1903
  • Emarginula hawaiiensis Dall, 1895
  • Emarginula koon Kilburn, 1978
  • Emarginula macclurgi Kilburn, 1978
  • Emarginula micans A. Adams, 1852
  • Emarginula natalensis Barnard, 1963
  • Emarginula nigromaculata (Thiele, 1930)
  • Emarginula obovata A. Adams, 1852
  • Emarginula oppressa (Barnard, 1963)
  • Emarginula patula Cotton, 1930
  • Emarginula phrygium Herbert & Kilburn, 1985
  • Emarginula plana Schepman, 1908
  • Emarginula puncticulata Adams, 1852
  • Emarginula scabricostata A. Adams, 1851
  • Emarginula scabriuscula A. Adams, 1852
  • Emarginula scutellata Deshayes, 1863
  • Emarginula subtilitexta Verco, 1908
  • Emarginula superba Hedley, 1906
  • Emarginula thorektes Kilburn, 1978
  • Emarginula undulata Melvill & Standen, 1903
  • Emarginula velascoi Rehder, 1980
  • Emarginula viridicana Herbert & Kilburn, 1985
Subgenus Subzeidora Iredale, 1924
  • Emarginula connectens Thiele, 1915
  • Emarginula devota Thiele, 1915
  • Emarginula souverbiana Pilsbry, 1890

References

  1. ^ Tryon, George W. Jr. (1879-1898). Manual of Conchology, structural and systematic. Academy of Natural Sciences, Philadelphia. pp. 248. 
  2. ^ Torr, C.M. (1914). "Radulæ of some South Australian Gasteropoda". Transactions of the Royal Society of South Australia. 38: 362–368. http://www.samuseum.sa.gov.au/Journals/TRSSA/TRSSA_V038/TRSSA_V038_p362p368.pdf. 
  3. ^ Keen, Angeline Myra (1971-06-01). Sea shells of tropical west America: marine mollusks from Baja California to Peru. ISBN 9780804707367. http://books.google.ca/books?id=Xj-2-KxUCcYC&pg=PA310. 
  4. ^ Torr, C.M. (1914). "Radulæ of some South Australian Gasteropoda". Transactions of the Royal Society of South Australia. 38: 362–368. http://www.samuseum.sa.gov.au/Journals/TRSSA/TRSSA_V038/TRSSA_V038_p362p368.pdf. 
  5. ^ WoRMS : Emarginula; accessed : 4 October 2010
  6. ^ Gastropods.com : Emarginula striatula
  7. ^ OBIS : Emarginula