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