Figure 10 in Systematics of the Miocene-Recent bryozoan genus Pentapora (Cheilostomata)

Figure 10.?Pentapora lacryma sp. nov., scanning electron micrographs of uncoated specimens from the Pliocene Red Crag Formation of Walton-on-Naze, Essex, England, imaged using back-scattered electrons. A, B, NHM D34979(a). A, autozooids and giant avicularia. B, broken ovicells and a giant avicularium (left). C, D, NHM D34979(b). C, autozooids with and without the outer aragonitic layer of the frontal shield. D, autozooid preserving the aragonite layer, sometimes merging across zooidal boundaries (arrow). Scale bars: A = 430 Mm; B = 210 Mm; C = 170 Mm; D = 160 Mm.