From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

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

See text

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

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 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.



  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. ^ a b 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.

External links[edit]