FIGURE 15. Rhamphostomella hincksi Nordgaard, 1906. A–G, I, K. ZIRAS 7 in Taxonomy, ecology and zoogeography of the Recent species of Rhamphostomella Lorenz, 1886 and Mixtoscutella n. gen. (Bryozoa, Cheilostomata)

FIGURE 15. Rhamphostomella hincksi Nordgaard, 1906. A–G, I, K. ZIRAS 7/50119 (western Kamchatka, Sea of Okhotsk). H, J, L. USNM 11130 (Point Barrow, Beaufort Sea). A. Colony margin with developing zooids. B. Distal view of marginal zooids, showing primary orifices with small, slender median tooth. C. Orifice with suboral avicularium. D, E. Groups of non-ovicellate zooids in young parts of colony. F. Ovicellate zooids with strongly developed interareolar ridges of frontal shield in older part of colony. G. Ovicellate zooids in older part of colony. H. Ovicellate zooid with suboral avicularium. I. Interior of frontal shield in three zooids, showing ring scars, areolae and ooecial communication slits (arrows). J. Basal colony surface with numerous broken tubular protuberances. K. Frontal shield interior, showing ring scar and exterior wall microstructure of umbonuloid component. L. Lateral view of zooid, showing suboral avicularium and zooidal lateral wall with mural pore chambers. Scale bars: A, D, G, J, 500 μm; B, C, H, I, 100 μm; E, F, 250 μm; K, 50 μm; L, 200 μm.