Fig. 4
From: Inferring muscular ground patterns in Bivalvia: Myogenesis in the scallop Nodipecten nodosus
Histological sections of muscular subsets of Nodipecten nodosus juveniles. a Posterior adductor in longitudinal section. Hematoxylin and eosin (HE). b Detail of adjacent smooth and striated portions of the posterior adductor. Toluidine blue and basic fuchsin (TB). c Detail of striated bundles of the posterior adductor. HE. d Longitudinal section of the foot. TB. e Detail of the inset shown in (d) with smooth fibers (arrows) spreading over the foot and forming the pedal plexus. TB. f Smooth muscles of the foot retractor. TB. Abbreviations: ft, foot; pa, posterior adductor; sm, smooth portion; st, striated portion