Introduction to Spiralia and Lophotrochozoa

The video tutorial explores the clade Nephrozoa, focusing on its division into Protostome and Deuterostomia. It delves into Spiralia, a complex clade defined by spiral cleavage, and introduces its major phyla, including Mollusca and Annelida. The tutorial explains the process of spiral cleavage in embryos and discusses the major clades within Spiralia: Nefera, Rufus Zowa, and Lophotrochozoa. It also addresses the challenges in classifying these clades and the evolutionary significance of spiral cleavage.

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