Spirontocaris lamellicornis (Dana, 1852)
Common name(s): Dana's blade shrimp, Dana's bladed shrimp
|Synonyms: Hippolyte lamellicornis|
Family Thoridae (formerly assigned to Hippolytidae)
|Spirontocaris lamellicornis, captured from 60-100 m depth in San Juan Channel.|
|(Photo by: Dave Cowles, July 2010)|
Recently members of family Hippolytidae which have seven articles in the carpus of the 2nd pereopod have been reassigned to family Thoridae.
How to Distinguish from Similar Species: Spirontocaris prionota has small spines on the anterior margins of its mid-dorsal carapace teeth. Spirontocaris ochotensis, S. truncata, S. arcuata, S. spina, and S. snyderi have bifid tips on the dactyls of pereopods 3-5.
Geographical Range: Bering Sea to Santa Monica Bay, CA. Mostly north of Point Conception, CA but some have been found in canyons in Santa Monica Bay.
Depth Range: Subtidal, 3-192 m.
Habitat: Mostly on sand and mud, some in rocky areas.
Biology/Natural History: This species is often found symbiotically with sea anemones including Cribrinopsis fernaldi and Urticina columbiana. In the Salish Sea and coastal British Columbia the species is often infested by the branchial isopod Bopyroides hippolytes.
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Lamb and Hanby, 2005
General Notes and Observations: Locations, abundances, unusual behaviors:
This is frozen specimen about 6 cm long. Found by Hilary Lease near Friday Harbor.
This closer view of the carapace and rostrum shows how deep the rostrum is and the large mid-dorsal teeth. A frozen individual.
The two supraorbital spines are visible in this photograph. A frozen individual.
The dactyls of pereopods 3-5 have simple but curved tips. Photo of live individual by Dave Cowles, July 2010
The uropods and telson are often banded with lighter colors. A frozen individual.
This photo of a live individual also shows the banded telson, plus the red color of the sixth abdominal segment.
Rosario Invertebrates web site provided courtesy of Walla Walla University