Tityrosphaeridium porosispinum
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"porosispinum" (Davey, 1982b, p.29–30, pl.10, figs.8–12) Norris and Jux, 1984, p.160. Holotype: Davey, 1982b, pl.10, figs.10–12. NOW Kleithriasphaeridium. Originally (and now) Kleithriasphaeridium, subsequently Tityrosphaeridium. Age: late Kimmeridgian–late Ryazanian.
Parent: Tityrosphaeridium