Anatomy of the attached Prometheus larva of <i>Symbion pandora</i>.

<p>SEM-SBF micrographs, longitudinal sections. Anterior is up and ventral is right in A’ and A”. (<b>A</b>) Prometheus larva settled on the trunk of a feeding stage (fs). Note the interface (arrowheads) between the attached Prometheus larva and the feeding stage. (A’) Mature male (mm). (A”) Young male (ym). (A”’) Internal bud (ib). Abbreviations: cu_fs cuticle of the feeding stage, cu_P cuticle of the attached Prometheus larva.