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AG Collins, JW Valentine - Evolution & development, 2001 - Wiley Online Library

Defining phyla: evolutionary pathways to metazoan body plans.

STEM and diversify

Collins, Valentine

GSID: P1SOzTr1JoMJ

Excerpt

… is for stem groups to radiate and then to be sorted by subsequent events. We speculate that stem … of Bilateria and continued to diversify to produce the stem ancestors of Deuterostomia, …

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