Fig. 13 in New records and five new species of sipunculans (Sipuncula) from the central and northwestern Mexican Pacific

Fig. 13. Phascolosoma (Phascolosoma) azteca sp. nov. (EMU-13443). A. Lateral overview, introvert contracted. B. Close-up of introvert base and anal area. C. Tentacles. D. Mid-posterior hook; asterisk indicates bubble inside clear streak. E. Illustration of hook. F. Internal anatomy. Abbreviations: see Material and methods. Scale bars: A, F = 2 mm; B–C = 0.5 mm; D–E = 20 µm.