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Fig. 13 | BMC Evolutionary Biology

Fig. 13

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. 13

Organization of the protocoel in 4-day-old juvenile of Phoronopsis harmeri. Color code: red – median blood vessel; cyan – protocoel; blue – mesocoel. a Sagittal semithin section of the epistome. b Sagittal thin section of the protocoel (c1), mesocoel (c2), and median blood vessel (mv). Desmosomes are indicated by double arrowheads. c Portion of the protocoel lining (lc1). Large cell with phagosome (ph), which contains degenerated myofilaments (mf). Abbreviations: bb – basal body; bl – basal lamina; c – cilium; c3 – trunk coelom; emc – muscle cells, which form musculature of esophagus; er – erythrocyte; es – esophagus; G – Golgi apparatus; lc3 – lining of trunk coelom; m – mouth; n – nucleus; pmc – projections of muscle cells

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