FIGURE 52. Alyonushka filia n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 52. Alyonushka filia n. gen., n. sp. Micro-CT scans of paratype, NIWA 127724, as back-face isosurface renders showing colony interiors. A, entire colony in profile; note the density of kenozooidal chambers in the column; B, close-up of distal part of column showing diminished numbers of kenozooids where it broadens into the calyx; C, optical section through gonozooid and ooeciostome, with arrowhead indicating a ledge at inner opening of ooeciostome; D, optical section through base of column showing protoecial dome with ancestrular peristome emerging from its apex (purple) and first daughter zooid (red) also originating from protoecium (its communication pore outside plane of section); note multiple layers of kenozooids; E, three successive sections through ancestrular region, moving upwards from left to right, respectively showing protoecium (red) and first daughter zooid (yellow), narrowing to ancestrular peristome and broadening peristome of daughter zooid. Scale bars: A, B, 250 µm; C–E, 100 µm.