Lagenadinium membranoidium

"?membranoidium" (Vozzhennikova, 1967, p.114–115, pl.48, figs.1–2,3a–b,4a–b,5–8,9a–c,10) Lentin and Vozzhennikova, 1990, p.103.  Emendation: Lentin and Vozzhennikova, 1990, p.103, as Lagenadinium? membranoideum.  Holotype: Vozzhennikova, 1967, pl.48, figs.9a–b; Lentin and Vozzhennikova, 1990, text-fig.58; lost according to Lentin and Vozzhennikova (1990, p.103).  Lectotype: ?Vozzhennikova, 1967, pl.48, fig.6; Lentin and Vozzhennikova, 1990, pl.10, figs.6–7; designated by Lentin and Vozzhennikova (1990, p.103).  NOW Stephanelytron.  Originally Chlamydophorella, subsequently Chlamydophorella?, thirdly Lagenadinium?, fourthly (and now) Stephanelytron.  Questionable assignment: Lentin and Vozzhennikova (1990, p.103).  Taxonomic junior synonym: Stephanelytron cretaceum, according to Heilmann-Clausen in Heilmann-Clausen and Thomsen (1995, p.301) — however, Courtinat (1999, p.178) retained Stephanelytron cretaceum.  Age: Late Jurassic.

Parent: Lagenadinium