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(invertebrate zoology)
One of the short, paired processes on the sides of the body segments in certain annelids.
A lateral expansion of the foot in gastropod mollusks.



one of the lateral processes on the body of polychaetous worms. The parapodia are borne in pairs by each trunk segment and serve primarily as locomotive organs. Parapodia typically consist of a ventral and a dorsal branch. Each branch is equipped with a cluster of bristles and with a tactile antenna, which at times is modified into a gill.

References in periodicals archive ?
Now more patients will be able to take advantage of the Parapodium, after one was donated to Middlesbrough's James Cook University Hospital.
Two curved and acuminate acicula are present in anterior parapodia with 1 acicula per parapodium in the remainder of the body.
a) Dorsal view of the iront end of the polychaete Pherecardia striata; b) prostomium, dorsal view; c) parapodium 4, anterior view; d) notochaeta and capillary neurochaeta, parapodium 4.
The Parapodium allows Paul to move his legs by using levers in a skiing motion.
However, he did not indicate the origin of the illustrated parapodium. For the preserved Caribbean specimen, he indicated that there was a slight indication of banding in the antennae, but the specimen was otherwise uniformly grayish.
In many cases, especially for large worms, a small piece of tissue, such as a parapodium, can be preserved for molecular work, whereas the remainder of the specimen is fixed in formalin.