Fig. 11
From: Regulation and evolution of muscle development in tunicates
Figure adapted from Bone and Ryan [34]
Muscle diversity among the Tunicata. Diagram showing different myofilament array types among the major tunicate groups. Thick filaments lengths drawn at the same scale relative to scale bar, except for pyrosome and ascidian body wall muscles in which lengths were not known. The width of each fiber shown is the maximum distance between the sarcolemma and the most interior myofilament. For doliolids, only the body wall muscles are shown, not the larval tail muscles, which are presumed to be similar to ascidian larval tail muscles.