PORT PHILLIP BAY


Fat-handed Snapping Shrimp 

Synalpheus tumidomanus (Paul'son, 1875)

View scientific description and taxonomy

Scientific Details

Pereopods without epipods. Pleuron of abdominal somite 6 without an articulating posterior triangular plate. Rostrum well developed. Carapace covering eyes completely in dorsal and lateral views, usually with orbital processes; pterygostomial angle produced. Chelipeds markedly asymmetrical, larger one swollen, carried extended, dactylus with plunger fitting into socket at base of fixed finger. Smaller cheliped with fingers simple.

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:
Caridea
Family:
Alpheidae
Genus:
Synalpheus
Species:
tumidomanus

General Description

Rostrum clearly longer and slightly narrower than orbital processes, not depressed, without ridge running on to carapace; very shallow grooves between. Orbitorostral process present. Large claw (chela) swollen, upper margin of sixth segment (propodus) ending in variable projection. Small claw (chela) fingers simple, each with simple apex. Fourth segment (merus) of third leg (pereopod 3) without spiniform setae on lower margin, no distal tooth; last segment (dactylus) with 2 distal claws, upper one longer than lower. Tailfan (telson) with stout dorsolateral spiniform setae. Maxilliped 3 with circlet of short apical spiniform setae and setae on inner face of terminal article. Up to 2.5 cm long.

Biology

The species is often found in male-female pairs and sometimes in larger numbers inside sponges. The fingers at the end of the larger claw are used to make a loud snapping noise to stun prey. Some species of Synalpheus are reported to have a simple sort of social behaviour and have been likened in this way to bees and ants.

Habitat

In algae, coral and sponges, to 150 m depth.

Reefs

Soft substrates

Coastal shores

Distribution guide

Circum-Australian and Indo-Pacific Oceans.

Species Group

Prawns, shrimps, lobsters Shrimps

Depth

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

Water Column

On or near sea floor

Max Size

25 mm

Diet

Organic matter

Commercial Species

No

Global Dispersal

Recorded in Australia

Species Code

MoV 1673

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, Fat-handed Snapping Shrimp, Synalpheus tumidomanus, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 25 Mar 2017, http://portphillipmarinelife.net.au:8098/species/5509

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