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In November, 1975, a clove worm was detected in the intestines of carp, Cyprinus carpio, which were collected in an irrigation pond farm in Gunma prefecture. They were six month old and 12.5-14.7 cm in body length. The worm was never found in carp which harbored another cestode, Bothriocephalus opsariichthydis YAMAGUTI. A monthly examination revealed that the number of the worm decreased rapidly after November and no worm could be detected from January to May. This suggested that the worm can not survive the winter.Ten worms fixed in 70% alcohol, stained with HE and mounted in balsam were observed:Body slender, 11.0-16.2 mm long by 0.8-2.4 mm wide; Scolex undifferentiated, conic or turncate, 1.2-2.7 mm wide; Cirrus pouch well developed, 0.52-0.68 mm long by 0.40-0.56 mm wide;Uterine coils between cirrus pouch and H-shaped ovary; Postovarian vitellaria medullary; Egg elliptical with thin shell, 44-50×22-34μ. The present worm was similar to the two species of the genus Khawia (Cestodaria:Caryophyllidae) in shape and size, K.japonensis (YAMAGUTI, 1934) YAMAGUTI, 1959 and K. sinensis HSU, 1935. These two species are distinguished only by the size of eggs, that is, the eggs of the former have been reported to be 48-57×36-42μ and those of the latter 42-48×25-30μ. Based on the egg size the present clove worm was identified as K. sinensis.

Notes of Khawia sinensis HSÜ found in Cultured Carp