FIGURE 13 in Taxonomy, ecology and zoogeography of the Recent species of Rhamphostomella Lorenz, 1886 and Mixtoscutella n. gen. (Bryozoa, Cheilostomata)

FIGURE 13. Rhamphostomella cellata (O'Donoghue & O'Donoghue, 1923). Lectotype, NHMUK 1964.1.2.9 (Pacific coast of North America, presumably Vancouver Island, British Columbia). A. Colony margin with developing zooids. B. Distolateral view of marginal zooids, showing shape of primary orifice and dimpled surface of frontal shield. C. Zooidal orifice with suboral avicularium. D. Group of non-ovicellate zooids in young part of colony. E. Single non-ovicellate zooid in older part of colony. F. Zooids with damaged ooecia in older part of colony. G. Zooids in older part of colony. H. Distal part of zooid with partially broken ooecium, showing form of secondary orifice and suboral avicularium. I. Interior of frontal shield, showing umbo, areolae and ooecial communication slit (arrow). J. Basal surface of colony, showing hardly recognizable boundaries between zooids. K. Interior of frontal shield, showing ring scar and exterior wall microstructure of umbonuloid component. L. Lateral view of zooid, showing peristome, areolae and zooidal lateral wall with mural pore chambers. Scale bars: A, D, J, 500 μm; B, F, G, 250 μm; C, E, H, I, 100 μm; K, 50 μm; L, 200 μm.