FIGURE 22. Rhamphostomella multirostrata n in Taxonomy, ecology and zoogeography of the Recent species of Rhamphostomella Lorenz, 1886 and Mixtoscutella n. gen. (Bryozoa, Cheilostomata)

FIGURE 22. Rhamphostomella multirostrata n. sp. Holotype, ZIRAS 1/50545 (Urup Island, Kuril Islands, Sea of Okhotsk). A. Colony margin with developing zooids and main avicularian cystids (arrows, sites of ooecial development). B. Distal view of marginal zooids, showing details of orifice and suboral avicularia. C. Zooidal orifice with broad lyrula and bases of oral spines. D. Oblique view of several zooids, one showing early developmental stage of ooecium. E. Zooids with developing ooecia. F. Frontal view of ovicellate zooids. G. Lateral view of ovicellate zooids. H. Lateral view of distal half of ovicellate zooid. I. Interior of frontal shield, showing lyrula, umbonuloid component and areolae. J. Internal view of primary orifice. K. Basal surface of colony, showing protuberances. L. Interior of frontal shield, showing ring scar and external-wall microstructure of umbonuloid component. M. Lateral view of zooid, showing frontal shield with areolae and interareolar ridges, avicularium and lateral wall with mural pore chambers. Scale bars: A, D–F, G, K, 500 μm; B, H, 250 μm; C, I, J, 100 μm; L, 50 μm; M, 200 μm.