Figure 5 in Four new species of Mesomyzostoma (Myzostomida: Annelida)

Figure 5. Mesomyzostoma okadai sp. nov. (A) Paratype (SIO-BIC A4080) in life. (B) Same specimen still partly inside arm of host crinoid. (C) Posterior end of paratype in A showing chaetigers 4 and 5, posterior cloaca and uterus, both filled with eggs. (D) Anterior end of paratype shown in A showing small first chaetiger, pharynx and digestive diverticulae. (E) Detailed scanning electron micrograph view of anterior margin of paratype (SIO-BIC A4086), showing lateral organs and low parapodia. (F) Micrograph of a parapodium digested in bleach showing the parapodial hook apparatus. Abbreviations: 1–5 refer to chaetigers; ac, acicula; c, cloaca; dt, gut diverticulae. go, arm gonad of host; h, hook; lo, lateral organ; ma, manubrium; pi, pinnule of host; u, uterus; ph, pharynx; m, mouth.