Fig. 21 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 21. Chaetonotus (Hystricochaetonotus) optabilis sp. nov., differential interference contrast. A–B, D. Paratype (CU-FNS-05-03-20-3/PA-2). C. Holotype (CU-FNS-05-03-20-1/HO). A. Detail of the anterior body region. B. Ventral view of the head region. Asterisks mark the beginning of the ventral ciliary bands, arrows mark the cuticular structures of the hypostomium. C‒D. Details of the posterior body region, showing the ovaries and the organ X. Scale bars = 10 µm.