Microdinium gymnosuturum

?gymnosuturum Smith, 1992, p.342,344-345, figs.5a-f,6a-d,11j-l.  Holotype: Smith, 1992, figs.5a-b.  Questionable assignment: Smith (1992, p.342).  Age: Late Campanian-Early Maastrichtian.

Parent: Microdinium