Systematophora placacantha var. ancyrea
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"var. ancyrea" (Cookson and Eisenack, 1965a, p.126, pl.14, figs.1-3) Strauss and Lund, 1992, p.173. Holotype: Cookson and Eisenack, 1965a, pl.14, fig.1; Fauconnier and Masure, 2004, pl.76, figs.1-3. Combination not validly published: basionym not fully referenced. NOW Cleistosphaeridium ancyreum. Originally Systematophora ancyrea, subsequently Systematophora placacantha var. ancyrea (combination not validly published), thirdly (and now) Cleistosphaeridium ancyreum. Taxonomic senior synonym: Hystrichosphaeridium (now Cleistosphaeridium) placacanthum, according to Stover and Evitt (1978, p.84) - however, Lentin and Williams (1981, p.272) retained Systematophora ancyrea. Age: Late Eocene. Parent: Systematophora placacantha
