FIGURE 8 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 8. Manayunkia danubialis Băcescu, 1944 n. comb., semithin sections (1 µm) through radiolar crown. A. Branches of radioles and ventral vascularized filamentous appendages, all separated. B. Branches of ventral and median radioles start to fuse; left dorsal lip visible (100 µm basal of section A). C. Fusion of branches of ventral and median radioles continues, dorsal radioles still separated; dorsal lips visible (28 µm basal of section B). D. Left ventral and median radioles fused, dorsal radioles still separated; left ventral vascularized filamentous appendage and dorsal lip fused (16 µm basal of section C). E. Radioles fused, and connected to ventral vascularized filamentous appendage by dorsal lips (40 µm basal of section D). F. Branchial heart dorsally, and ventral anterior peristomial ring lobe visible (16 µm basal of section E). Scale bars A–F 100 µm (abbr: bh branchial heart, dl dorsal lips, dr dorsal radiole, mr median radiole, v aprl ventral anterior peristomial ring lobe, vr ventral radiole, vvfa ventral vascularized filamentous appendages).