“Akera”的意思、由来-开放百科全书

词条

Akera

释义

Description
Species
References
External links

{{Automatic taxobox
| name = Akera
| fossil_range= {{fossil range|Callovian|recent}}
| image = Akera bullata shell.jpg
| image_caption = shells of Akera bullata
| taxon = Akera
| authority = O. F. Müller, 1776^[1]
| synonyms_ref= ^[2]
| synonyms=

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

| subdivision_ranks = Species
| subdivision = See text
}}Akera is a marine genus of sea hare in the family Akeridae, known from the late Callovian (Jurassic) to the recent periods.^[2]^[3]

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)

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. ^¹Gofas, 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. ^{{cite journal | author=Schiøtte T.| title=A taxonomic revision of the genus Diaphana Brown, 1827, including a discussion of the phylogeny and zoogeography of the genus (Mollusca: Opisthobranchia)| journal=Steenstrupia| year=1998| volume=24| pages=77–140}}

External links

[https://web.archive.org/web/20090102040416/http://www.seaslugforum.net/factsheet.cfm?base=akeroidea Akeroidea at Sea Slug Forum showing Akera soluta]
[https://web.archive.org/web/20071023055224/http://www.seaslugforum.net/factsheet.cfm?base=akersolu Akera soluta at Sea Slug Forum]
Akera bullata

3 : Akeridae|Callovian first appearances|Extant Middle Jurassic first appearances

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