Coccopterum labyrinthus, (Ostenfeld, 1903), Silva, 1970

Now Nematosphaeropsis. Originally Pterosperma, subsequently Pterococcus, thirdly Coccopterum, fourthly (and now) Nematosphaeropsis.
Tax. sr. synonym of Nematosphaeropsis balcombiana Deflandre and Cookson, 1955, according to Reid, 1974, and Matsuoka, 1983. Wrenn, 1988, retained Nematosphaeropsis balcombiana as a separate species.
Wrenn, 1988, retained this species in Pterococcus and did not consider it to be a dinoflagellate. Fensome et al., 1993, retained the species in Nematosphaeropsis Deflandre and Cookson, 1955.
Cyst equivalent of Gonyaulax spinifera (Claparede and Lachmann, 1859) Diesing, 1866, according to Dodge, 1989.

Holotype: Ostenfeld, 1903, fig.12
Age: Recent