Figure 8-2. A bestiary of basic anatomical body plans: (A) Nematode, experimental model system, C. elegans with tissues identified (for use below); (B) hydra; (C) starfish illustrating radial symmetry; (D) fossil fern from Carboniferous age around 350 million years ago (Mya); (E) fossil trilobite from the Cambrian (Burgess shale) about 500 Mya; (F) Richard Owen's famous archetype of a standard, shared vertebrate body plan. Also see the frog, fly, and plant body plan figures below. Sources: Fern, (White 1899); trilobite, (Walcott 1918); (figures D-F reproduced from Moore 1987; 1989, with permission).
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