FIGURE 12 in Hornera currieae n. sp. (Cyclostomatida: Horneridae): a new bathyal cyclostome bryozoan with reproductively induced skeletal plasticity

FIGURE 12. Cancelli in Hornera currieae n. sp. A. Longitudinally ground branch; abfrontal cancelli originate from hypostegal pores (arrows) located in the grooves between lateral zooids (NIWA 8443). B. Cancelli originate at hypostegal pores; pore detail showing fine inward facing spines (NIWA 8443). C. BSE-SEM of ground, diamond-polished branch; cross-section of a cancellus showing preserved skeletal asymmetry, a consequence of the sustained presence of raised cancellus hoods during growth. D. Transverse semithin section of several H. currieae n. sp. cancelli showing epithelial linings (arrowed); note delamination of decalcified skeleton. E. Detailed view of two abfrontal cancelli (micro-CT back-surface render): adjacent cancelli with similar fine-scale fluctuations in direction and thickness; cancellus on right has coalesced with a third cancellus (TAN0104 stn 153). F. Magnified view of 8A showing nodular appearance of cancelli under light microscope (TAN0104 stn 153). G. Openings of proximally bent cancelli with trailing ridges (NIWA 8449). H. Coalescence of five cancelli (highlighted yellow) during secondary calcification; single-channel extract of anaglyphic 3D image, hence slight ghosting (TAN0104 stn 153). Scale bars: A, F–H, 100 µm; B, 10 µm; C, 40 µm; D, 30 µm; E, 50 µm.