Kleithriasphaeridium porosispinum
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porosispinum Davey, 1982b, p.29–30, pl.10, figs.8–12. Holotype: Davey, 1982b, pl.10, figs.10–12. Originally (and now) Kleithriasphaeridium, subsequently Tityrosphaeridium. Lentin and Williams (1985, p.209) retained this species in Kleithriasphaeridium. Age: late Kimmeridgian–late Ryazanian.
Parent: Kleithriasphaeridium