Pseudopythina rugifera (Carpenter, 1864)
Common name(s): Mud shrimp clam, Wrinkled montaculid, Rough wrinkled lepton
|Synonyms: Orobitella rugifera, Neaeromyra rugifera|
|Pseudopythina rugifera on the abdomen of the mud shrimp Upogebia pugettensis. Shell length 18 mm.|
|(Photo by: Dave Cowles, July 2005)|
How to Distinguish from Similar Species: This is the only clam found attached by byssal threads to the abdomen of Upogebia. Pseudopythina compressa has a serrated dorsal margin of its right valve, and a thickness about 1/3 the length; plus does not have an indented ventral margin (and is not on Upogebia).
Geographical Range: Kodiak, Alaska to Punta Rompiente, Baja California.
Depth Range: Intertidal to 5m
Habitat: Symbiont on the abdomen of Upogebia pugettensis and on Aphrodita polychaetes.
Biology/Natural History: Males in this species are dwarves and can be found in the mantle cavity of the larger female.
Smith et al. (2008) found in a small sample that parasitism by this clam did not seem to cause weight loss in Upogebia pugettensis.
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Morris et al., 1980
Ricketts et al., 1985
Smith, Andrew E., John W. Chapman, and Brett R. Dumbauld, 2008. Population structure and energetics of the bopyrid isopod parasite Orthione griffinis in mud shrimp Upogebia pugettensis. Journal of Crustacean Biology 28(2): 228-233
University of Michigan Museum of Zoology: Discusses dwarf males