Fig. 3 in Kinetid in larval cells of Spongillida (Porifera: Demospongiae): tracing the ancestral traits

Fig. 3 Ultrastructure of the kinetid in larval cells of Eunapius fragilis, transverse plane. Consecutive sections of three cells (a–d, e–g, i–k) and a section of another cell (h). Scale bar 200 nm. Abbreviations: bf, basal foot; c, centriole; ftr, filamentous train; lmt, lateral microtubules; k, kinetosome; tf, transition fibre