Marine Species Traits - Omalogyra Jeffreys, 1859

WoRMS taxon details

Omalogyra Jeffreys, 1859

Omalogyra atomus (Philippi, 1841)
Specimen from La Goulette, Tunisia (among algae 0-1 m, 19.09.2008), actual size 0.7 mm.

AphiaID

138276 (urn:lsid:marinespecies.org:taxname:138276)

Classification

Status

accepted

Rank

Genus

Type taxon

Truncatella atomus R. A. Philippi, 1841 accepted as Omalogyra atomus (R. A. Philippi, 1841) (type by subsequent designation)

Parent

Omalogyridae G. O. Sars, 1878

Original name

Euomphalus (Omalogyra) Jeffreys, 1859

Synonymised names

Ammonicerina O. G. Costa, 1861 · unaccepted

Euomphalus (Omalogyra) Jeffreys, 1859 · unaccepted (original rank)

Helisalia Laseron, 1954 · unaccepted

Homalogyra Jeffreys, 1867 · unaccepted (unjustified emendation)

Direct children (25)

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Species Omalogyra ammonitoides (A. W. B. Powell, 1940)
Species Omalogyra antarctica Egorova, 1991
Species Omalogyra atomus (R. A. Philippi, 1841)
Species Omalogyra burdwoodiana Strebel, 1908
Species Omalogyra disculus Palazzi, 1988
Species Omalogyra fusca Suter, 1908
Species Omalogyra fuscopardalis Rolán, 1992
Species Omalogyra liliputia (Laseron, 1954)
Species Omalogyra simplex (O. G. Costa, 1861)
Species Omalogyra taludana Castellanos, 1989
Species Omalogyra undosa Palazzi, 1988
Species Omalogyra zebrina Rolán, 1992
Subgenus Omalogyra (Ammonicera) Vayssière, 1893 accepted as Ammonicera Vayssière, 1893
1. Species Omalogyra (Ammonicera) planorbis (Dall, 1927) accepted as Palazzia planorbis (Dall, 1927)
2. Species Omalogyra (Ammonicera) rota (Forbes & Hanley, 1850) accepted as Ammonicera rota (Forbes & Hanley, 1850)
Subgenus Omalogyra (Omalogyrina) Magne & Vergneau-Saubade, 1973 † accepted as Orbitestella Iredale, 1917 (navailable name: no diagnosis, no type species designation)
1. Species Omalogyra (Omalogyrina) enjalberti Magne & Vergneau-Saubade, 1973 † accepted as Orbitestella plicatella (Cossmann, 1888) †
Species Omalogyra atomus (R. A. Philippi, 1841) sensu Arnaud, 1972 accepted as Omalogyra antarctica Egorova, 1991 (unaccepted > misapplication)
Species Omalogyra ausonia Palazzi, 1988 accepted as Palazzia ausonia (Palazzi, 1988) (superseded combination)
Species Omalogyra bicarinata Suter, 1908 accepted as Zerotula bicarinata (Suter, 1908) (superseded combination)
Species Omalogyra discula Palazzi, 1988 accepted as Omalogyra disculus Palazzi, 1988 (Spelling variation)
Species Omalogyra nodicarinata Sleurs, 1985 accepted as Ammonicera nodicarinata (Sleurs, 1985) (original combination)
Species Omalogyra planorbis (Dall, 1927) accepted as Palazzia planorbis (Dall, 1927) (unaccepted > superseded combination)
Species Omalogyra pulcherrima Brazier, 1894 accepted as Liotella pulcherrima (Brazier, 1894)
Species Omalogyra vangoethemi Sleurs, 1985 accepted as Ammonicera vangoethemi (Sleurs, 1985) (original combination)

Environment

marine, ~~fresh~~, ~~terrestrial~~

Grammatical gender

feminine

Original description

(of Euomphalus (Omalogyra) Jeffreys, 1859) Jeffreys, J. G. (1859). Additional gleanings in British Conchology. Annals and Magazine of Natural History. (3) 4: 189-201., available online at http://biodiversitylibrary.org/page/2356324
page(s): 197 [details]

Taxonomic citation

MolluscaBase eds. (2025). MolluscaBase. Omalogyra Jeffreys, 1859. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=138276 on 2025-05-20

Taxonomic edit history

Date

action

2004-12-21 15:54:05Z

created

Gofas, Serge

2011-08-08 20:32:27Z

changed

Bouchet, Philippe

2012-12-27 11:15:59Z

changed

Bouchet, Philippe

2014-12-20 16:56:35Z

changed

Gofas, Serge

2014-12-24 08:38:32Z

changed

Gofas, Serge

2017-01-24 00:42:23Z

changed

Marshall, Bruce

2020-01-25 19:05:51Z

changed

Marshall, Bruce

2022-08-10 05:11:10Z

changed

Bouchet, Philippe

2022-08-10 11:23:38Z

changed

Bouchet, Philippe

Licensing

The webpage text is licensed under a Creative Commons Attribution 4.0 License

[taxonomic tree]

Nomenclature

original description (of Ammonicerina O. G. Costa, 1861) Costa, O. G. (1861). Microdoride mediterranea; o, Descrizione de poco ben conosciuti od affatto ignoti viventi minuti e micoscropici del Meditterraneo, pel professore O. G. Costa. Tomo primo. Con tredici tavole. i-xviii, 1-80. Stamperia dell'Iride, Napoli., available online at http://biodiversitylibrary.org/item/47094
page(s): 67 [details]

original description (of Homalogyra Jeffreys, 1867) Jeffreys, J. G. (1867). British Conchology, or an Account of the Mollusca which now Inhabit the British Isles and Surrounding Seas. Vol. 4. John Van Voorst, London. 486 pp., 8 pls.
page(s): 67; note: emended from "formerly Omalogyra" [details]

original description (of Helisalia Laseron, 1954) Laseron, C. F. (1954). Revision of the Liotiidae of New South Wales. The Australian Zoologist. 12 (1): 1-25., available online at https://www.biodiversitylibrary.org/page/38912930
page(s): 16 [details]

original description (of Euomphalus (Omalogyra) Jeffreys, 1859) Jeffreys, J. G. (1859). Additional gleanings in British Conchology. Annals and Magazine of Natural History. (3) 4: 189-201., available online at http://biodiversitylibrary.org/page/2356324
page(s): 197 [details]

Other

additional source Bieler, R. & Mikkelsen, P. M. (1998). Ammonicera in Florida: Notes on the smallest living gastropod in the United States and comments on other species of Omalogyridae (Heterobranchia). The Nautilus. 111 (1): 1–12., available online at http://biodiversitylibrary.org/page/8273723
page(s): 5-6; note: type species discussed [details]

subsequent type designation Coan E.V. & Kabat A.R. (2012) The malacological works and taxa of Sylvanius Hanley (1819-1899). Malacologia 55(2): 285-359.
page(s): 334; note: Truncatella atomus designated type species under Art. 70.3 [details]

subsequent type designation Tate, R. (1868). Appendix to the Manual of the Mollusca of S.P. Woodward, A. L. S. London, Virtue & Co., 86 pp., available online at https://www.biodiversitylibrary.org/page/12171914
page(s): 31 [details]

Present

Inaccurate

Introduced: alien

Containing type locality

Definitions

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To European Nucleotide Archive, ENA (Omalogyra)
To Genbank
To ITIS

From editor or global species database

Omalogyra atomus (Philippi, 1841)
Specimen from La Goulette, Tunisia (among algae 0-1 m, 19.09.2008), actual size 0.7 mm.

Image from typetaxon