Fig. 3

Some examples of hexasters. SEM. a spherical discohexaster with few terminal rays (Hyalascus sp., Rossellidae Rossellinae). b floricome (Regadrella sp., Euplectellidae Corbitellinae). c discoplumicome (Saccocalyx pedunculatus, Euplectellidae Bolosominae). d strobiloplumicome (Doconesthes dustinchiversi, Rossellidae Lanuginellinae). e discoctaster (Acanthascus malacus, Rossellidae Acanthascinae). f comparison of macrodiscohexaster (Amphidiscella lecus, Euplectellidae Bolosominae) and microdiscohexaster (Schaudinnia sp., Rossellidae Rossellinae) upper right at same scale. g microdiscohexaster, enlarged (Schaudinnia sp.). h spirodiscohexaster (Saccocalyx pedunculatus, Euplectellidae Bolosominae). i discaster (Walteria flemmingi, Euplectellidae Corbitellinae). j spherical discohexaster with large anchorate discs (Rhabdopectella tintinnus, Euplectellidae Bolosominae). k drepanocome (Amphidiscella sp.). l graphiocome, center and terminal ray (Regadrella sp., Euplectellidae Corbitellinae). All scale bars = 10 μm