Minoru Sorimachi

Kudoa intestinalis n. sp. (Myxosporea: Multivalvulida) from the Intestinal Musculature of the Striped Mullet, Mugil cephalus, from Japan

Kudoa intestinalis n. sp. (Myxosporea: Multivalvulida) is described from the intestinal musculature of the striped mullet, Mugil cephalus, from the southeastern coast of the Kii Peninsula, Japan. The plasmodia of the new species are spherical or ellipsoidal and contain quadrangular spores that, on the average, measure 3.4 microns in length, 6.5 microns in width and 6.1 microns in thickness. The species is characterized by the presence of short projections at the apex and concave values posteriorly.

Myxobolus spirosulcatus n. sp. (Myxosporea, Bivalvulida) infecting the bile duct of the yellowtail Seriola quinqueradiata from Japan

Myxobolus spirosulcatus n. sp. (Myxosporea: Bivalvulida), infecting the cultured yellowtail Seriola quinqueradiata, is described. M. spirosulcatus n. sp. was found in the bile duct of yellowtails collected in the southern part of Japan during June 1990. The plasmodium of the new species has various shapes and contains a vegetative form plus maturing and mature spores. Mature spores, on average, measure 8.9 μm in length, 7.8 μm in width and 6.7 μm in thickness. The unique morphological characteristics of the new species are spiral furrows in the peripheral part of the spore valves.