Tetrachacysta keenei
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?keenei Marshall, 1989, p.51–52, pl.7, figs.1–12; text-figs.15A–C. Holotype: Marshall, 1989, pl.7, figs.5–7; text-fig.15B; Fensome et al., 1996, figs.4–6,11 — p.2179. Questionable assignment: Marshall (1989, p.51). Age: Turonian–early Santonian.
Parent: Tetrachacysta