Abstract
Cardiostrongylus sikae n. gen., n. sp. (Nematoda: Molineoidea: dictyocaulidae) was described based on six specimens from the heart muscle of sika deer, Cervus nippon centralis, captured at the foot of Mt. Goyo, Iwate Prefecture, Japan. The new genus resembles Dictyocaulus that is parasitic in the bronchi of artiodactyls, but is readily distinguished by having a cephalic swelling of cuticle in the anterior end, and by the site in host.
Key words: dictyocaulid nematode; Cardiostrongylus sikae n. gen. n. sp., sika deer; Cervus nippon centralis; heart muscle; morphology.