Planinosphaeridium choane

"choane" (Reid, 1974, p.588–589, pl.1, figs.1–2) Wall et al., 1977, p.149.  Holotype: Reid, 1974, pl.1, figs.1–2; Fensome et al., 1993a, figs.1–2 — p.1053.  NOW Ataxiodinium.  Originally (and now) Ataxiodinium, subsequently Planinosphaeridium.  Taxonomic senior synonym: Planinosphaeridium (now Pentadinium) membranaceum, according to Dale (1976, p.45; footnote to table II) — however, Edwards and Andrle (1992, p.265) retained Ataxiodinium choane.  N.I.A.  Age: Holocene.

Parent: Planinosphaeridium