Skip to main content
Fig. 12 | BMC Evolutionary Biology

Fig. 12

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. 12

Organization of the protocoel at later stages of metamorphosis of Phoronopsis harmeri. a Sagittal semithin section of the protocoel (c1) at stage of eating of the peoral lobe. Degenerated epithelium of the preoral lobe (dpl) is above the protocoel. b Sagittal semithin section of the protocoel in 1-h-old juvenile. c Thin section of the protocoel of 1-h-old juvenile. The lumen of protocoel is filled with thick apical protrusions (plc1) of cells of the protocoel lining (lc1). Desmosomes between cells are indicated by double arrowheads. Abbreviations: bc – blastocoel; bl – basal lamina; c3 – trunk coelom; ECM – extracellular matrix; emc – muscle cells, which form esophageal musculature; es – esophagus; m – mouth; mc – muscle cells in blastocoel; n – nucleus; nu – nucleolus; mv – median blood vessel; rer – rough endoplasmic reticulum; sr – striated rootlet

Back to article page