Gynodiastylidae

Taxobox
name = Gynodiastylidae


image_width =
image_caption =
regnum = Animalia
phylum = Arthropoda
subphylum = Crustacea
classis = Malacostraca
superordo = Peracarida
ordo = Cumacea
familia = Gynodiastylidae
familia_authority = Stebbing, 1912 [Stebbing, T.R.R., (1912). The Sympoda, Part 6. Annals of the South African Museum 10: 129–176.]
subdivision_ranks = Genera
subdivision =
Allodiastylis
Axiogynodiastylis

Dayus

Dicoides

Eogynodiastylis

Gynodiastylis

Haliana

Litogynodiastylis

Paradicoides

Pseudozimmeriana

Sheardia

Zimmeriana

Gynodiastylidae is one the eight most commonly recognised families of crustaceans of the order cumacea. They are especially prevalent in the Southern hemisphere, with some types described from Japan, Thailand and The Persian Gulf. Most are found at less than 100 meters depth. [Day, J, (1980). South African Cumacea, Part 4: Families Gynodiastylidae and Diastylidae. Annals of the South African Museum 82 (6): 187–292.]

Anatomy

Gynodiastylidae have a small free telson, usually lacking terminal setae, though in some cases there may be two. The interior branch (endopod) of the uropods is present on segments one through three. The number of free thoracic somites is never reduced. The first pereopods have a group of long rigid fibres (setae) on the propodus. Males have no pleopods. The flagellum of the second antenna does not reach further than the hindmost edge of the carapace. Females have a very small second antenna (much smaller than the first). They also have no exopods (outer branches) on their third maxillipeds. Because they lack exceptions to the two most important diagnostic characteristics (the lack of pleopods in males and of exopods on maxilliped 3 in females), Gynodiastylidae have a pre-eminent place among monographic descriptions.

References

External links

* [http://www.marinespecies.org/cumacea/cumacea.php?p=taxdetails&id=181392 Gynodiastylidae] on the Cumacea World Database.