''Akera'' is a

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of sea hare in the family

Akeridae Akeridae is a small taxonomic family of sea snails, marine gastropod molluscs belonging to the superfamily Akeroidea, the sea hares. The family, in its original spelling "Aceridae", has previously been attributed in error to Pilsbry, 1893. Ake ...

, known from the late Callovian (Jurassic) to the recent periods.Gofas, S. (2012). Akera O.F. Müller, 1776. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137641 on 2012-03-31Sepkoski's Online Genus Database
Downloaded 14 October 2008.

Description

''Akera'' is a primitive genus. These sea hares do not fit completely in their external shell; it just covers their visceral hump which is positioned at the posterior end of their bodies. Their streamlined bodies are adapted for burrowing.

Species

* ''

Akera bayeri ''Akera'' is a marine genus of sea hare in the family Akeridae, known from the late Callovian (Jurassic) to the recent periods.Gofas, S. (2012). Akera O.F. Müller, 1776. Accessed through: World Register of Marine Species at http://www.marinespe ...

'' (Marcus & Marcus, 1967) - It can be found along the coast of

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

and

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. * ''

Akera bullata ''Akera bullata'' is a species of sea snail (or sea slug), a marine opisthobranch gastropod mollusk in the family Akeridae, a family that is related to the sea hares. This species is the only European representative of the genus ''Akera''. Di ...

'' (

O. F. Müller O is the fifteenth letter of the modern Latin alphabet. O may also refer to: Letters * Օ օ, (Unicode: U+0555, U+0585) a letter in the Armenian alphabet * Ο ο, Omicron, (Greek), a letter in the Greek alphabet * O (Cyrillic), a letter of the ...

, 1776) - type species *''

Akera julieae ''Akera'' is a marine genus of sea hare in the family Akeridae, known from the late Callovian (Jurassic) to the recent periods.Gofas, S. (2012). Akera O.F. Müller, 1776. Accessed through: World Register of Marine Species at http://www.marinespe ...

'' Valdes & Barwick, 2005 * '' Akera silbo'' Ortea & Moro, 2009 * '' Akera soluta'' (

Gmelin Gmelin may refer to: * Gmelin's test, a chemical test * Gmelin database, a German handbook/encyclopedia of inorganic compounds initiated by Leopold Gmelin People * Carl Christian Gmelin (1762–1837), German botanist, author of ''Flora Badensis ...

, 1791) - Also called the ''Solute akera'', this species can be found in the Indo-West Pacific. Little is known about this species. Its shell can grow as large as 45 mm in length. * † ''

Akera striatella ''Akera'' is a marine genus of sea hare in the family Akeridae, known from the late Callovian (Jurassic) to the recent periods.Gofas, S. (2012). Akera O.F. Müller, 1776. Accessed through: World Register of Marine Species at http://www.marinespe ...

'' Lamarck, 1804 - fossil from the

Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' ...

and

Oligocene The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the ...

. *'' Akera tasmanica'' Beddome, 1883: synonym of '' Diaphana tasmanica'' (Beddome, 1883)

References

External links

Akeroidea at Sea Slug Forum showing ''Akera soluta''

''Akera soluta'' at Sea Slug Forum

{{Taxonbar, from=Q1791144 Akeridae Callovian first appearances Extant Middle Jurassic first appearances