PORT PHILLIP BAY


Beaded Hairy Crab 

Pilumnus monilifer Haswell, 1881

View scientific description and taxonomy

Scientific Details

Carapace with clubbed setae, at least close to anterior and anterolateral margins, plus few scattered clusters of 2-3 longer soft hairs elsewhere; carapace with group of 3-12 tubercles on a curved ridge near anterolateral margin (obscured ridge or small tubercles only on small individuals). Male gonopod 1 with hooked tip, less bent in juveniles, with long setae at right angle near tip.

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:
Pilumnidae
Subfamily:
Pilumninae
Genus:
Pilumnus
Species:
monilifer

General Description

Carapace with clubbed setae, at least close to anterior and anterolateral margins, plus few scattered clusters of 2-3 longer soft hairs elsewhere; carapace with group of 3-12 tubercles on a curved ridge near anterolateral margin. Male gonopod 1 with hooked tip, less bent in juveniles, with long setae at right angle near tip. Up to 2 cm wide.

Biology

This is the most common species of Pilumnus in Bass Strait, recognisable from the mat of short clubbed hairs and scattered longer hairs, plus the curved row of short tubercles protruding through this mat. The curved row of tubercles of larger specimens is represented in juveniles simply as a low ridge buried in the soft velvety fur.

Habitat

In sponges, bryozoans, and algae, intertidal to 70 m depth.

Soft substrates

Reefs

Coastal shores

Distribution guide

Southern temperate oceans, including south-eastern 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

2 cm

Diet

Organic matter

Harmful

Not harmful but a nip from claws could be painful.

Commercial Species

No

Global Dispersal

Native to Australia

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, Beaded Hairy Crab, Pilumnus monilifer, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 18 Oct 2017, http://portphillipmarinelife.net.au:8098/species/5494

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