PORT PHILLIP BAY


Striated Hermit Crab 

Dardanus arrosor (Herbst, 1796)

View scientific description and taxonomy

Scientific Details

Rostrum absent. Eyestalks shorter than antennule peduncle. Ocular scales short with oblique and denticulate distal border. Mesogastric region with forked grooves; transverse cardiac line sometimes present. Both chelipeds with strong corneous claws, left cheliped much larger than right; chelipeds and pereopods 2 and 3 with outer faces ornamented with transverse striae fringed with short setae. Left uropod much stronger than right. Both sexes with 4 biramous pleopods on left, in female pleopods 2-4 endopods bifurcate (whole apparently trifurcate). Pleurobranch on thoracic somite 8. Maxilla 1 without lateral flagellum on endopod. Red and white rings around eyes, red and white stripes on carapace and legs; chelipeds with blue-purple stripes.

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:
Anomura
Family:
Diogenidae
Genus:
Dardanus
Species:
arrosor

General Description

Left claw (cheliped) much larger than right. Claws (chelipeds) and first and second walking legs (pereopods 2 and 3) with outer faces ornamented with transverse striae fringed with short setae. Red and white rings around eyes, red and white stripes on carapace and legs. Claws with blue-purple stripes. Up to 14 cm total length.

Biology

Hermit crabs are scavengers on dead shells and fishes but may be able to catch and feed on crabs and other living animals. They can find food using chemical stimuli. The antennae have "smell detectors" which detect chemicals that stimulate food searching behaviour. When similar detectors on the legs contact food the claws quickly grasp it and pass it into the mouth.

Habitat

Low intertidal, to depths of 200 m.

Reefs

Soft substrates

Distribution guide

Mediterranean and Red Seas, Indo-West Pacific including Japan and New Zealand, and Australia.

Species Group

Hermit Crabs

Depth

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

Water Column

On or near sea floor

Max Size

14 cm

Diet

Organic matter

Commercial Species

No

Global Dispersal

Recorded in Australia

Species Code

MoV 1709

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, Striated Hermit Crab, Dardanus arrosor, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 23 Sep 2017, http://portphillipmarinelife.net.au:8098/species/5458

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