Morphometry on lancet flukes found in Japanese sika deer (Cervus nippon centralis) captured in Iwate Prefecture, Japan.

Thirty-six flukes were collected from the livers of wild deer (Cervus nippon centralis) captured in Iwate Prefecture, Japan, and were served for morphometry. The length and/or the width of the body, suckers, testes, ovary, vitelline glands, cirrus pouch and eggs in the uterus of the flukes were measured. The distance between anterior end of the body and position of the maximal body-width or upper end of the testes were also determined. A remarked morphological characteristic was that the right and left testes did not lie tandem but lined bilaterally. Also the position of the maximal body-width did not always locate in the posterior part of the body of the fluke. The property was in accordance with those for Dicrocoelium chinensis.