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鹿児島湾産マダイに寄生していたマダイヤツデムシ(新称)Choricotyle elongata(扁形動物:単生綱)とそのタイプ標本の観察

新田理人・菅 孔太朗・長澤和也

Abstract / Introduction / Summary:

Two individuals of Choricotyle elongata (Goto, 1894) were found on the wall of the mouth cavity of a red seabream Pagrus major (Temminck and Schlegel, 1843) collected in Kagoshima Bay off Yoshino-chō, Kagoshima City, Kagoshima Prefecture, southern Kyūshū, Japan. This is the first record of C. elongata from Kagoshima Bay and expands the distribution range of the species from Mogi, Nagasaki Prefecture, northern Kyūshū, southward to the bay. In addition, the syntypes of Diclidophora elongata Goto, 1894 (= Choricotyle elongata) (UMUTZ-HlmPrst-90) were found in the collection at the University Museum, the University of Tokyo but could not be observed for their morphological characters because the specimens were heavily damaged and lost their haptoral structures due to drying.