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Fig. 15 | BMC Evolutionary Biology

Fig. 15

From: Metamorphic remodeling of morphology and the body cavity in Phoronopsis harmeri (Lophotrochozoa, Phoronida): the evolution of the phoronid body plan and life cycle

Fig. 15

Hypothetical scenario of evolutionary formation of the phoronid body plan. a The last common phoronid ancestor, which was worm-like animal, had tentacles for food capture, and moved on the ventral side of the body. b Had being in danger, the worm-like ancestor buried itself in soft sediment by means of the ventral protrusion, to which the loop of the intestine was drawn. Abbreviations: dt – digestive tract; pr – hypothetical predator; ss – soft sediment; t – tentacle; vp – ventral protrusion

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BMC Ecology and Evolution

ISSN: 2730-7182

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