Munida quadrispina Benedict, 1902
Common name(s): Squat lobster
|Munida quadrispina from 100 m depth, San Juan Channel|
|(Photo by: Dave Cowles, July 2000)|
How to Distinguish from Similar Species: Munidopsis quadrata's eyes are not pigmented plus it lives only in very deep water.
Geographical Range: Sitka, Alaska to Los Coronados, Baja California
Depth Range: 12-1463 m depth
Habitat: Rock faces or cobble in low current, slightly silty areas.
in areas with low oxygen. Eats detritus, carrion, small plankton.
This crustacean can actively swim. They are one of the main species
observed on the surfaces of deep-sea sponges off British Columbia.
They are predators on other benthic shrimp.
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Lamb and Hanby, 2005
Antonsen, Brian L. and Dorothy H. Paul, 2000. The Leg Depressor and Levator Muscles in the Squat Lobster Munida quadrispina (Galatheidae) and the Crayfish Procambarus clarkii (Astacidae) Have Multiple Heads with Potentially Different Functions. Brain, Behavior and Evolution 56:63-85 (DOI: 10.1159/000006678) (Link)
Antonsen, B.L. D.H. Paul, 2001. Serotonergic and octopaminergic systems in the squat lobster Munida quadrispina (Anomura, Galatheidae). J Comp Neurol. 2001 Oct 29;439(4):450-68 (PubMed)
Burd, B.J. 1983. The distribution, respiration and gills of a low oxygen tolerant crab, Munida quadrispina (Benedict, 1902) (Galatheidae, Decapoda) in an intermittently anoxic fjord. M.Sc. Thesis, University of Victoria, Victoria, B.C.
Burd, B.J. 1985. Respiration of a low oxygen tolerant galatheid crab, Munida quadrispina (Benedict, 1902). Canadian Journal of Zoology 63: 2538-2542.
Burd, B.J. and R.O. Brinkhurst. 1984. The distribution of the Galatheid crab Munida Quadrispina (Benedict 1902) in relation to oxygen concentrations in British Columbia fjords. Journal of Experimental Marine Biology and Ecology 81: 1-20.
Wallis, E., D. Paul, B. Antonsen, and R. Hollenberg, 1995. Variations
on a segmental theme: muscle receptor organs and extensor neuromusculature
in the squat lobster Munida quadrispina (Anomura, Galatheidae).
Journal of Experimental Biology 198: 12 2453-2463
A view of another individual, captured at 100-120 m depth in the San Juan Channel. Carapace length of this individual is 2.5 cm to orbit; width is 2.0 cm. Photo by Dave Cowles, August 2015
A view of the chelae.
A view of the abdomen. Note that the abdomen has ridges and setae but not spines.