SUMMARY AND SIGNIFICANCE OF OVERLOOKED JAPANESE LITERATURE ON MYZOSTOMIDA

The content of hitherto uncited or unreviewed Japanese scientific lite rature on Myzostomida is summarized with comments. The range of Myzost oma willemoesii von Graff has been extended to Japan, with an addition al host record (a recent unpublished record from the Ogasawara Islands is also given). An associated myzostome has been reported from the he xactinellid sponge Farrea. Myzostoma crassum Okada, 1922 is an overloo ked but available nomen dubium. Cleavage has been studied in M. deani McClendon. Myzostoma echinus von Graff has been misidentified consiste ntly as M. costatum Leuckart in Japanese literature, and another speci es whose true identity is unclear has often been misidentified as M. a mbiguum von Graff. Other possible recent misidentifications are pointe d out herein. Notopharyngoides Fishelson, nomen nudum, has inadvertent ly been made available as Notopharyngoides Uchida, 1992, with the type species Myzostoma ijimai Hara & Okada, 1921.