Hystrichogonyaulax coreoides

"coreoides" Benedek, 1972, p.20, pl.9, figs.4a–c.  Emendation: Benedek and Sarjeant, 1981, p.328–330, as Phthanoperidinium coreoides.  Holotype: Benedek, 1972, pl.9, figs.4a–c; Benedek and Sarjeant, 1981, fig.3, nos.2,4; fig.5.  NOW Phthanoperidinium.  Originally Hystrichogonyaulax, subsequently (and now) Phthanoperidinium.  Taxonomic senior synonym: Peridinium (now Phthanoperidinium) comatum, according to Stover and Evitt (1978, p.118) — however, Benedek and Sarjeant (1981, p.328–330) retained Phthanoperidinium coreoides.  Taxonomic junior synonym Phthanoperidinium tritonium, according to Fensome et al. (2009, p.54–55), which species had previously been considered a taxonomic junior synonym of Phthanoperidinium comatum by Bujak in Bujak et al. (1980, p.72).  Age: middle Oligocene.

Parent: Hystrichogonyaulax