Akera

Akera is a marine genus of sea hare in the family Akeridae, known from the late Callovian (Jurassic) to the recent periods.[2][3]

Akera
Temporal range: Callovian–recent
shells of Akera bullata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Clade: Euopisthobranchia
Clade: Anaspidea
Superfamily: Akeroidea
Family: Akeridae
Genus: Akera
O. F. Müller, 1776[1]
Species

See text

Synonyms[2]
  • Acera Jeffreys, 1867 (unjustified emendation of Akera Müller, 1776)
  • Aceras Locard, 1886 (unjustified emendation of Akera)
  • Eucampe Leach, 1847
  • Vitrella Swainson, 1840

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 (Marcus & Marcus, 1967) - It can be found along the coast of Colombia and Brazil.
  • Akera bullata (O. F. Müller, 1776) - type species
  • Akera julieae Valdes & Barwick, 2005
  • Akera silbo Ortea & Moro, 2009
  • Akera soluta (Gmelin, 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 Lamarck, 1804 - fossil from the Eocene and Oligocene.
  • Akera tasmanica Beddome, 1883:[4] synonym of Diaphana tasmanica (Beddome, 1883)
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References
  1. Müller O. F. (1776). Zoologiæ Danicæ prodromus, seu animalium Daniæ et Norvegiæ indigenarum characteres, nomina, et synonyma imprimis popularium. pp. I-XXXII [= 1-32], 1-274. Havniæ. (Hallager). page 242.
  2. 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 2012-03-31
  3. Sepkoski's Online Genus Database. Downloaded 14 October 2008.
  4. Schiøtte T. (1998). "A taxonomic revision of the genus Diaphana Brown, 1827, including a discussion of the phylogeny and zoogeography of the genus (Mollusca: Opisthobranchia)". Steenstrupia. 24: 77–140.
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