Petalifera

Taxobox
name = "Petalifera"
status = secure


image_width = 200px
image_caption = "Petalifera petalifera"
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
subclassis = Orthogastropoda
superordo = Heterobranchia
ordo = Opisthobranchia
subordo = Anaspidea
superfamilia = Aplysioidea
familia = Aplysiidae
genus = "Petalifera"
genus_authority = Gray, 1847
subdivision_ranks = Species
subdivision = See text.

"Petalifera" is a genus of sea slug, a sea hare, a marine gastropod mollusk belonging to the family Aplysiidae, the sea hares.

Some authors place this genus in a separate family Dolabriferidae. A new study, published in September 2004, cite journal | author=Annette Klussmann-Kolb| title= Phylogeny of the Aplysiidae (Gastropoda, Opisthobranchia) with new aspects of the evolution of seahares| journal=Zoologica Scripta| year=2004| volume=33| issue=5| url=http://www.ingentaconnect.com/content/bsc/zsc/2004/00000033/00000005/art00004| pages=439–462| doi= 10.1111/j.0300-3256.2004.00158.x] has shown that the genus "Petalifera" is paraphyletic.

(Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the on-going changes, different reliable sources can yield very different classifications.)

A more general description can be found on the page of the superfamily Aplysioidea.

Description

The parapodia (fleshy winglike outgrowths), as can be seen in photos of "Petalifera petalifera", are almost completely fused. The pair of small rounded flaps form the parapodial cavity over the mantle cavity and the vestigial shell. These sea hares swim by coiling and uncoiling the body.

pecies

*"Petalifera albomaculata" Farran, 1905
*"Petalifera habei" Eales, 1960 (synonym of "Petalifera ramosa")
*"Petalifera krusadalai" O’Donoghue, 1930
*"Petalifera petalifera" Rang, 1828
**Distribution : Cosmopolitan.
**Length : 2 to 4 cm
**Color : grayish to brown, with white longitudinal bands; almost translucent.
**Description : rather flat body; their color camouflages them when they are grazing on the brown alga "Padina".
*"Petalifera punctulata" Tapparone-Canefri, 1874
**Distribution : Japan
*"Petalifera qingdaonensis" Lin, 1990
*"Petalifera ramosa" Baba, 1959
**Distribution : Western Pacific, Atlantic.
**Length : 5 to 7 cm
**Color : pink to pale brownish, with white rings over the body; almost translucent.
**Description : mantle covered with firm conical tubercles; the larger tubercles have terminal papillae with retractable filamentous branches; difficult to find, mostly hidden under the leaves of green alga "Caulerpa".

Footnotes

External links and references

* Martinez, E., 1996. "On "Petalifera petalifera" (Rang, 1928) (Gastropoda: Opisthobranchia): new anatomical and geographical data". "J. Moll. Stud." 62: 243-250.
* Baba, K. 1959. "The Genus "Petalifera" and a new species, "P. ramosa", from Japan". "Publ. Seto Mar. Biol. Lab." VII (3): 41-43.
* [http://www.seaslugforum.net/petapeta.htm Photo of "Petalifera petalifera"]
* [http://www.philippine-sea-slugs.com/ANASPIDEA/Petalifera_ramosa_01.htm Photo of "Petalifera ramosa"]