Cleistosphaeridium spinosum

"?spinosum" (Boltenhagen, 1977, p.54–55, pl.7, figs.1a–b,2,3a–b,4a–b,5a–b) Lentin and Williams, 1981, p.51.  Emendation: Masure in Fauconnier and Masure, 2004, p.116–117, as Trichodinium boltenhagenii.  Holotype: Boltenhagen, 1977, pl.7, figs.1a–b; Fauconnier and Masure, 2004, pl.15, fig.6.  NOW Trichodinium boltenhagenii.  Originally Chytroeisphaeridia spinosa, subsequently Cleistosphaeridium? spinosum, thirdly Circulodinium spinosum, fourthly (and now) Trichodinium boltenhagenii.  Questionable assignment: Lentin and Williams (1981, p.51).  Age: Cenomanian–Turonian.

Parent: Cleistosphaeridium