PORT PHILLIP BAY


Comma Shrimp 

Litogynodiastylis concava (Hale, 1946)

View scientific description and taxonomy

Scientific Details

Female and subadult male. Carapace deeply concave laterally. Pseudorostrum without carinae. Eye lobe without lenses. First antenna small to moderate. Pereopod 1 simple, relatively short. Pereopod 2 basis serrate, with few strong teeth distally. Female with fully developed exopods on pereopods 1 and 2, pereopods 3 and 4 without exopods. Telson shorter than uropod peduncles, lateral margins smooth, bearing 1 pair stout lateral setae and 1 pair stout terminal setae. Uropod endopod biarticulate, longer than exopod. Terminal setae of uropod rami simple. Adult male. Unknown.

Source: Gerken, S. (2001) The Gynodiastylidae (Crustacea: Cumacea). Memoirs of the Museum of Victoria, 59, 1-276.

Taxonomy

Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Subclass:
Eumalacostraca
Superorder:
Peracarida
Order:
Cumacea
Family:
Gynodiastylidae
Genus:
Litogynodiastylis
Species:
concava

General Description

Female and subadult male. Carapace deeply concave laterally. Pseudorostrum without carinae. Eyelobe without lenses. Pereopod 2 basis serrate, with few strong teeth distally. Telson shorter than uropod peduncles, lateral margins smooth, bearing 1 pair stout lateral setae and 1 pair stout terminal setae. Uropod endopod biarticulate, longer than exopod. Terminal setae of uropod rami simple. Adult male. Unknown.

Biology

Litogynodiastylis concava is named for the distinctive concave sides of the carapace. Cumaceans burrow into the surface of sandy and muddy sediments but can also be found in the sediment trapped among macroalgae. At night especially cumaceans can be active swimmers in the open water and this is probably where mating occurs. Females carry the eggs in a marsupium made from branches of the thoracic legs, making the front of the animal more swollen than normal. The eggs hatch as miniature adults.

Habitat

Soft bottom in silt and sand, at depths of 5-363 m.

Soft substrates

Distribution guide

Southern temperate oceans, including south-eastern Australia.

Species Group

Microcrustaceans Cumaceans

Depth

Shallow (1-30 m)
Deep ( > 30 m)

Water Column

On or near sea floor

Max Size

2.5 mm

Diet

Organic matter

Commercial Species

No

Global Dispersal

Native to Australia

Species Code

MoV 59

Conservation Status

  • DSE Advisory List : Not listed
  • EPBC Act 1999 : Not listed
  • IUCN Red List : Not listed

Author

article author Taylor, J.

Dr. Jo Taylor is the Sciences Collections Online Coordinator at Museum Victoria.

Author

article author Poore, G.C.B.

Dr. Gary Poore is Principal Curator Emeritus at Museum Victoria.

citation

Cite this page as:
Taylor, J. & Poore, G.C.B., 2011, Comma Shrimp, Litogynodiastylis concava, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 18 Aug 2017, http://portphillipmarinelife.net.au:8098/species/5291

Text: creative commons cc by licence