Fig. 6

Photomicrographs of Tintinnopsis uruguayensis in vivo (a–d) and after protargol staining (e–j). a Lateral view of a representative individual. b Lorica showing a flared collar with jagged rim. c Lorica with atypical collar rim. d Cell proper escaped from lorica. e Ventral side; arrowhead indicates the second short kinety in the right ciliary field. f Left ciliary field and dorsal kinety. g Dorsal kinety. h Prolonged collar membranelles and macronuclear nodules. i Right ciliary field. j Lateral view of a middle divider. DK, dorsal kinety; LF, left ciliary field; Ma, macronuclear nodule; OP, oral primordium; PK, posterior kinety; RF, right ciliary field; VK, ventral kinety. Scale bars = 30 μm (a, b), 15 μm (d–k)