Fig. 2 in Kinetid in larval cells of Spongillida (Porifera: Demospongiae): tracing the ancestral traits

Fig. 2 Ultrastructure of the kinetid in larval cells of Eunapius fragilis, longitudinal plane. Consecutive sections of three cells (a–d, e–g, i–j) and separate sections of six cells (h, k–o). Scale bars a–l 200 nm, m–o 250 nm. Abbreviations: afb, apical filamentous bundle; axs, axosome; bfb, basal filamentous bundle; bf, basal foot; fb, fibrillar bridge between