Neocrangon communis (Rathbun, 1899)
Common name(s): Gray shrimp, twospine crangon, common two-spined crangon
|Synonyms: Crangon communis, Sclerocrangon communis|
|Adult female Neocrangon communis from 308 m depth near the southwest coast of Kamchatka|
|(Photo by: Andrey Gontchar )|
How to Distinguish from Similar Species:
Geographical Range: Japan, Chukchi Sea, Russia, Alaska, British Columbia down to central California
Depth Range: 16 m down to at least 1537 m.
Habitat: Mud or mud and sand bottoms
Biology/Natural History: This is one of the most common subtidal shrimp in this area. It sometimes swims up into the water column, to at least 100 m off the bottom. Ovigerous females can be found in January-February and May-September. They bear about 2200 eggs.
Parasites include the branchial parasitic isopod Argeia pugettensis (especially in Puget Sound) and the rhizocephalan barnacle Mycetomorpha vancouverensis.
The genus Neocrangon is separated from Crangon by the fact that Crangon has an arthrobranch gill on the third maxilliped and one median spine, while Neocrangon does not have the arthrobranch gill on the third maxilliped but does have the single median spine. Butler (1980) notes that along our coast this species does not have the arthrobranch gill but it has two median dorsal spines instead of one. On this basis, Butler (1980) decided the separation of
genera is invalid and called this species C. communis. Lamb
and Hanby (2005) also follow this nomenclature.
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Butler, 1980 (as Crangon communis)
Lamb and Hanby, 2005 (as Crangon communis)
Ricketts et al., 1981
General Notes and Observations: Locations,
abundances, unusual behaviors:
Rosario Invertebrates web site provided courtesy of Walla Walla University