FIGURE 20 in Taxonomy, ecology and zoogeography of the Recent species of Rhamphostomella Lorenz, 1886 and Mixtoscutella n. gen. (Bryozoa, Cheilostomata)

FIGURE 20. Rhamphostomella tatarica (Androsova, 1958). ZIRAS 7/50548 (western Kamchatka, Sea of Okhotsk). A. Colony margin with young and developing zooids. B. Distal view of marginal zooids, showing developing ooecia, details of orifice and multiporous septula in distal transverse wall. C. Orifice with suboral avicularium. D. Non-ovicellate zooids in young part of colony. E. Zooids with developing ooecia in young part of colony. F, G. Ovicellate zooids in older part of colony. H. Lateral view of distal half of ovicellate zooid. I. Interior of frontal shield, showing umbo, ring scar and areolae. J. Internal view of primary orifice. K. Basal surface of colony. L. Interior of frontal shield, showing ring scar and exterior wall microstructure of umbonuloid component. M. Lateral view of zooid, showing frontal shield and lateral wall with mural pore chambers. Scale bars: A, D, G, K, 500 μm; B, E, F, H, 250 μm; C, I, J, 100 μm; L, 50 μm; M, 200 μm.