Pterodinium cingulatum subsp. polygonale

subsp. polygonale (Clarke and Verdier, 1967, p.47, pl.8, figs.7–8; text-fig.20) Paul et al., 1994, p.722.  Holotype: Clarke and Verdier, 1967, pl.8, fig.7; Jan du Chêne et al., 1986a, pl.89, figs.7–9.  Originally Hystrichosphaera cingulata var. polygonalis, subsequently Spiniferites cingulatus subsp. polygonalis, thirdly Spiniferities? cingulatus subsp. polygonalis, fourthly (and now) Pterodinium cingulatum subsp. polygonale.  Taxonomic senior synonyms (at specific rank): Hystrichosphaera (now Spiniferites) crassimurata, according to Clarke et al. (1968, p.181) and Cymatiosphaera (now Pterodinium?) pterota, according to Pavlishina (1990, p.95) — however, Paul et al. (1994, p.722) retained Hystrichosphaera cingulata subsp. polygonalis (as Pterodinium cingulatum subsp. polygonale).  Age: Cenomanian.

Parent: Pterodinium cingulatum