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Hystrichosphaeridium irregulare

"Hystrichosphaeridium? irregulare" (Merrill, 1895, p.16; text-fig.14) Sarjeant, 1964b, p.175.

TYPE: Holotype: Merrill, 1895, text-fig.14.

STATUS: Combination illegitimate - senior homonym: Hystrichosphaeridium irregulare Pocock, 1962. Substitute name: Hystrichosphaeridium speciale.

HISTORY: Originally Geodia? irregularis (Appendix A), subsequently Hystrichosphaeridium irregulare (combination illegitimate), thirdly Hystrichosphaeridium? irregulare (combination illegitimate), fourthly Hystrichosphaeridium speciale. Questionable assignment: Stover and Evitt (1978, p.56) as a problematical species.

SYNONYM(S): 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.


Infraspecific taxa:


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