FIG. 3. Hippoporidra dictyota n in Convergent colonial organization and reproductive function in two bryozoan species epizoic on gastropod shells

FIG. 3. Hippoporidra dictyota n. sp., scanning electron micrographs, paratype specimen (USNM: 21601). (A) Portion of surface, scale bar 5 1 mm. (B) A mammilla, with male zooids and avicularia, scale bar 100 mm. (C) Ori®ce of male zooid and vicarious avicularium, scale bar 100 mm. (D) Ori®ce of female zooid, scale bar 100 mm. (E) Ovicells and vicarious avicularia (scale as D). adv, adventitious avicularium; or, ori®ce; ov, ovicell; vic, vicarious avicularium.