Orbiniella petersenae sensu stricto, SEM A paratype ZMBN 157663, anterior end, ventral view showing narrow annuli between parapodia 1 and 7 B paratype ZMBN 157650, midbody, ventral view showing narrow annuli between parapodia 17 and 24 C paratype ZMBN 157650, posterior end, ventral view D paratype ZMBN 157650, detail of last two chaetigers together with pygidium (insert of C). Numbers indicate narrow annuli between parapodia. Abbreviations: Par1: first parapodium; Par6: sixth parapodium. Scale bars: 500 μm (A); 100 μm (B, C); 20 μm (D).