Fig. 12
From: Regulation and evolution of muscle development in tunicates
Colonial ascidians. a Colonies of Botryllus schlosseri, showing typical rosette organization of individual blastozooids (dotted outline). Adapted from image by Géry Parent (https://commons.wikimedia.org/wiki/File:Botryllus_schlosseri_(Pallas,_1766).jpg). b Precocious development of juvenile structures in the adultative larva of some colonial species. Top: Non-adultative larva of the solitary species Molgula occidentalis. Bottom: Adultative larva of an unidentified colonial aplousobranch species, showing elaborated tail as well as fully formed siphons, branchial basket, endostyle, and differentiated body wall muscles. Both larvae stained with phalloidin conjugates (red) and DAPI (blue), and shown to the same scale (bar = 100 μm)
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