FIGURE 11. A. Hornera currieae n in Hornera currieae n. sp. (Cyclostomatida: Horneridae): a new bathyal cyclostome bryozoan with reproductively induced skeletal plasticity

FIGURE 11. A. Hornera currieae n. sp.: magnified view of floor (left) and walls (right) of inflated gonozooid incubation chamber in 9E after removal of the roof: the broken wall reveals several of the broad chambers shown in 10C at the base of the cancelli (arrow); the gonozooid chamber floor is densely pitted with resorption structures of unknown origin (NIWA 8443). B. Partial backface isosurface render showing a cross-section of gonozooid roof with thick anastomosing cancelli (exterior at bottom) (TAN0104 stn 153). C. Inferred H. currieae n. sp. ancestrula, seamlessly immured, growing on the abfrontal surface of a colony of the same species (NIWA 8443). D. Backface isosurface render of the two ancestrulae in Figs 9F, 10A, B: ancestrular tube, white arrow; periancestrular daughter zooid, black arrow (TAN0104 stn 153). E. Early-stage H. currieae n. sp. ancestrula on branch of same species (TAN0104 stn 399). F. Magnified view of ancestrula in E, showing orifices of primary and daughter zooid, and pustule-bearing wall (TAN0104 stn 399). G–H. Heavy secondary calcification in H. currieae n. sp. G. Frontal view of branch from mid-region of colony; in older branches autozooidal orifices became increasingly spaced and cancelli are reduced in number due to coalescence (NHMUK genetic voucher specimen AW999, courtesy of Dr. Andrea Waeschenbach). H. BSE-SEM of polished branch section, showing extensive secondary thickening. Scale bars: A–E, H, 100 µm; F, 50 µm; G, 200 µm.