Fig. 2.

Plate organisation and general anatomy of B. hirsutum. External and internal view of A: carina, B: rostro-lateral, C: rostrum, D: tergum, E: scutum. F: Soft-bodied animal with serrated cirral appendages. G: Top view of an intact specimen with a carino-rostral diameter of 2.5 cm; c: carina, cl: carino-lateral, rl: rostro-lateral, r: rostrum, t: tergum, s: scutum. H SEM image of a shell plate showing growth ridges (gr) with protruding chitinous setae. Scale bars: A–C = 1.5 cm; D–F = 1 cm; H = 500 μm.