Nexosispinum vetusculum
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vetusculum (Davey, 1974, p.45, pl.1, figs.1–2) Davey, 1979b, p.558. Holotype: Davey, 1974, pl.1, fig.2. Originally Adnatosphaeridium, subsequently Systematophora, thirdly (and now) Nexosispinum, fourthly Kiokansium. Prössl (1990, p.104) retained this species in Nexosispinum. Age: early Barremian.
Parent: Nexosispinum