PORT PHILLIP BAY


Comma Shrimp 

Gynodiastylis hartmeyeri Zimmer, 1914

View scientific description and taxonomy

Scientific Details

Adult female and subadult male. Carapace smooth and unornamented. Eyelobe without lenses. Pereopod 1 propodus less than half carpus length. Pereopod 2 without fine hairlike setae. Pereopods 3?5 dactylus and terminal seta unmodified. Telson shorter than uropod peduncles, lateral margins smooth and without terminal setae. Uropod rami without fine hairlike setae. Uropod endopod triarticulate, longer than exopod. Uropod terminal simple. Body length 2.3 mm. 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:
Gynodiastylis
Species:
hartmeyeri

General Description

Carapace smooth, not covered with setae; pseudorostral lobes without carinae. Uropod rami longer than or equal to uropod peduncle; uropod endopod triarticulate. Telson more than 0.5 uropod peduncle length. Body length females up to 2.3 mm, males unknown.

Biology

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 from rock and coral sand, at depths of 8-112 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 64

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, Gynodiastylis hartmeyeri, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 23 Nov 2017, http://portphillipmarinelife.net.au:8098/species/5288

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