The musculature of the hypogean mysid, Lepidomysis longipes (Pillai and Mariamma) is remarkably modified. It shows the absence of many muscles and poor development of others in the abdominal region. This is correlated with the subterranean nature of the animal.
Nath, C. N..
Studies on the abdominal musculature of the subterranean mysid, Lepidomysis longipes (Pillai and Mariamma).
International Journal of Speleology,
Available at: http://scholarcommons.usf.edu/ijs/vol6/iss2/4