Hystrichosphaeridium speciale
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"speciale" Lentin and Williams, 1981, p.147. Holotype: Merrill, 1895, text-fig.14. Originally Geodia? irregularis (Appendix A), subsequently Hystrichosphaeridium irregulare (combination illegitimate), thirdly Hystrichosphaeridium? irregulare (combination illegitimate), fourthly Hystrichosphaeridium speciale. This is the substitute name for Hystrichosphaeridium? irregulare (Merrill, 1895, p.16; text-fig.14) Sarjeant, 1964b, p.175 (an illegitimate name). Taxonomic senior synonym: Xanthidium tubiferum var. complex (now Oligosphaeridium complex), according to Harker and Sarjeant in Harker et al. (1990, p.59). Age: Early Cretaceous.
Parent: Hystrichosphaeridium