PORT PHILLIP BAY


Ridged Swimming Crab 

Liocarcinus corrugatus (Pennant, 1777)

View scientific description and taxonomy

Scientific Details

Carapace wider than long; front with 3 lobes; dorsal margin of orbit with 2 closed incisions; 5 anterolateral teeth. Basal antennal article anterolateral angle produced into a lobule. Cheliped merus without distal tooth on inner border; carpus with strong tooth on inner angle, generally lacking outer tooth; chela dactylus with 3 dorsal ridges. Walking legs 1-3 each with 1 ventral ridge; walking leg 5 dactylus lanceolate. Abdominal somites 3-5 fused in males.

Source: Poore, G.C.B. (2004) Marine decapod Crustacea of southern Australia. A guide to identification (with chapter on Stomatopoda by Shane Ahyong). CSIRO Publishing, Melbourne, 574 pp.

Taxonomy

Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Subclass:
Eumalacostraca
Superorder:
Eucarida
Order:
Decapoda
Suborder:
Pleocyemata
Infraorder:
Brachyura
Family:
Portunidae
Subfamily:
Polybiinae
Genus:
Liocarcinus
Species:
corrugatus

General Description

Carapace wider than long with ridges; front with 3 lobes, with five anterolateral teeth. Fifth segment (merus) of claw (cheliped) without distal tooth on inner border; sixth segment (carpus) with strong tooth on inner angle, generally lacking outer tooth; last segment of claw (dactylus) with 3 dorsal ridges. With a broad sharp last segment on the swimming leg (half as wide as long). Up to 26 mm wide.

Biology

Swimming crabs swim only poorly and some never swim at all. The most accomplished swimming crabs have broad paddle-like last legs that get them off the bottom where they spend most of their time buried in the sand. Many swimming crabs are active and aggressive. Some taxonomists believe that several species masquerade under this name and that the true corrugatus may not live in Australia.

Habitat

Intertidal, to 147 m depth.

Soft substrates

Reefs

Distribution guide

Atlantic-Indo-west Pacific Oceans including southern Australia.

Species Group

Crabs and allies Crabs

Depth

Shore (0-1 m)
Shallow (1-30 m)
Deep ( > 30 m)

Water Column

On or near sea floor

Max Size

26 mm

Diet

Organic matter

Harmful

Not harmful but a nip from large claws could be painful

Commercial Species

No

Global Dispersal

Recorded in Australia

Species Code

MoV 707

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, Ridged Swimming Crab, Liocarcinus corrugatus, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 24 May 2017, http://portphillipmarinelife.net.au:8098/species/5499

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