Nematosphaeropsis balcombiana
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*balcombiana Deflandre and Cookson, 1955, p.268-269, pl.8, fig.5. Holotype: Deflandre and Cookson, 1955, pl.8, fig.5. Taxonomic senior synonym: Pterosperma (as Nematosphaeropsis) labyrinthus, according to Reid (1974, p.592) - however, Wrenn (1988, p.139) retained Nematosphaeropsis balcombiana. Head and Westphal (1999, p.12) considered this species to be the questionable taxonomic senior synonym of Nematosphaeropsis rigida. Motile equivalent: Gonyaulax spinifera (Claparède and Lachmann, 1859) Diesing, 1866, according to Wall and Dale (1967, p.352; 1968c, p.270). Wrenn in Head and Wrenn (1992, p.14) recommended that this name be restricted to the holotype. Age: Mid Miocene.
Parent: Nematosphaeropsis
