Myzostoma nigrescens, Leuckart, 1836

von Graff, Ludwig, 1884, Report on the Myzostomida collected during the voyage of H. M. S. Challenger during the years 1873 - 1876, Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 – 76, Zoology 10, No. 27, pp. 1-82 : 44

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