Tsitsikamma pedunculata a, b in situ c collected specimens showing vascular stalk and covered with sponge epibiont Mycale (Mycale) sp. SAIAB 207196 d section of ectosome with underlying choanosome SAIAB 207166 e outer section of ectosome with chiadiscorhabds in a dense layer externally SAIAB 207166 f section through the stalk showing lumen of vascular-interior SAIAB 207166 g, h various sinuous styles i, j collection of SEM images of chiadiscorhabds k, l light microscope image of chiadiscorhabds. Scale bars 6 cm (b); 1 cm (d); 100 µm (g, h); 20 µm (i–l).