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Figure 2
Figure 11:
S. brakenhielmi
can asexually reproduce via three different mechanisms; Pallial budding (top left) is when new zooids form from the lateral walls of the parent zooid.
Stolons
(bottom left)
are fibrous tubes that connect adult zooids together and allows them to share materials and fluids as well as undergo.
Stolonic budding, where the intervals (nodes) of stolons swell and form new buds that then develop into zooids. Ampullae (top right) are not to be confused with stolonic buds, instead they function only at the periphery of the colony and assist with blow flow. Vascular budding (bottom right), where the tunic of the parental zooid (oozooid) extends and fills with vessels which pump out cellular-rich blood into the tunic. The hemocyte cells differentiate and combine to make tissues and form new buds. Here we can see a vessel (not a stolon) that connects the two groups of developing zooids together. Also pictured are other species of ascidiacea.
Figure 1
Figure 2
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