Fig. 1
From: Physical properties of the tunic in the pinkish-brown salp Pegea confoederata (Tunicata: Thaliacea)
Zooids and tunic of Pegea confoederata. a Aggregate zooids alive onboard. b Cross section of the tunic cuticle (TEM). c Protrusions on the tunic surface (SEM). Arrows indicate some of the protrusions on the tunic cuticle (cu). mb, muscle band; mo, mouth; st, stomach; tu, tunic matrix. Scale bars: 1 cm in (a), 0.2 μm in (b), 1 μm in (c)