This Majid crab has a
long rostrum (over 1/2 as long as the rest of the carapace) composed of
2 slender, spinelike processes (photo).
The processes are diverged from one another throughout most of their
There is no promenent spine projecting laterally behind each eye (photo),
though there is is smaller spine forming the back half of the eye orbit
and a forward-projecting spine in front of the eye at the base of the
The carapace is pear-shaped, white with orange spines, with a width to
4.5 cm. The legs are long, fairly smooth, red with white
rounded in cross-section. There are 2 white bands on the
1 each on the carpus and on the propodus. The first walking
longer than the chelipeds.
Chorilia longipes Dana, 1851
Common name(s): Longhorn decorator crab
|Chorilia longipes from 100 m
San Juan Channel.
The carapace of this individual is 2.5 cm wide and 4.5 cm long,
rostrum. The total leg span in a normal stance is 14 cm.
|(Photo by: Dave
How to Distinguish
gracilis has rostral spines which are nearly
parallel at least
proximally, it has a prominent spine projecting laterally behind each
and it does not
have spines on the dorsal carapace.
to Cortez Bank, Mexico; Japan.
subtidal, 9-1190 m
Rocks and boulders, gravel,
shelly, and muddy bottoms.
often decorates. The individual above has several sponges on
Berke, Sarah K. and Sarah A.
Behavioral and morphological aspects of decorating in Oregonia
(Brachyura Majoidea). Invertebrate Biology 128:2 pp 172-181
General Notes and
abundances, unusual behaviors:
Though there are many bumps and small spines on this species' carapace,
it does not have the prominent, laterally-directed spines behind the
The long spines which make up the rostrum can be clearly seen from
|Chorilia longipes has long,
legs and chelae. Both
of its chelae are striped orange-red and white on both the inside and
|Left chela, inside view
|Left chela, outside view
|Right chela, outside view
Authors and Editors of Page:
Dave Cowles (2007): Created original page
CSS coding for page developed by Jonathan Cowles (2007)