Figure 15. A–E in Systematics of the bryozoan genus Macropora (Cheilostomata)

Figure 15. A–E, Monoporella exsculpta (Marsson, 1887), Cretaceous, Maastrichtian. A, B, SMF Voigt Collection 11247, Lower Maastrichtian, Basbeck, Hemmoor, Niedersachsen, Germany. A, broken ovicell. B, detail of broken edge of ovicell tilted to reveal costae (right medial and right lateral costal lumina arrowed). C–E, SMF Voigt Collection 7170, Upper Maastrichtian, St Petersburg, Maastricht, the Netherlands. C, autozooids, some with closure plates, a kenozooid (right of centre) and a mandibulate avicularium (lower right). D, two avicularia, the lower lacking a mandible and showing the deep rostral shelf, the upper with an intact mandible. E, fragment showing underside of frontal shield with pseudopores and a probable opesiule arrowed. F,?Macropora similis sp. nov., NHM BZ5379, Pliocene, Momoe-a-toa Tuff, Momea-toa, Chatham Island; interior of zooid showing in-situ operculum and underside of frontal shield with grooves diverging outwards from opesiules. Scale bars: A, C = 500 mm; D, F = 200 mm; B, E = 100 mm.