Fig. 22 in Boring bryozoans: an investigation into the endolithic bryozoan family Penetrantiidae

Fig. 22 Scanning electron microscopic images of resin casts of gonozooids in four different penetrantiids. a Penetrantia sp. from Spain. b P. irregularis from southern New Zealand. c–d P. parva from northern New Zealand. e–f Penetrantia sp. from Japan. ast adventitious stolon, bch brood chamber, op operculum, ped peduncle, st stolon, zt zooidal tube