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Appendix A

Baltisphaeridium trifurcatum

"Baltisphaeridium trifurcatum" (Eisenack, 1931, p.112, pl.4, figs.21-23 ex Eisenack, 1938a, p.12,16-19) Eisenack, 1959, p.202.

TYPE: Holotype: Eisenack, 1931, pl.4, fig.21, as Ovum hispidum subsp. trifurcatum; Eisenack, 1938a, pl.2, fig.2; lost according to Eisenack (1959, p.202). Neotype: Eisenack, 1959, pl.17, fig.3, designated by Eisenack (1959, p.202).

HISTORY: NOW: Peteinosphaeridium trifurcatum (Appendix A). Originally Ovum hispidum subsp. trifurcatum (name not validly published, Appendix A), subsequently Hystrichosphaeridium trifurcatum, thirdly Baltisphaeridium trifurcatum, fourthly (and now) Peteinosphaeridium trifurcatum (Appendix A).

SYNONYM(S): Taxonomic junior synonyms: Peteinosphaeridium bergstroemii Staplin et al., 1965, an acritarch species, according to Eisenack (1969b, p.254-255); Baltisphaeridium trifurcatum subsp. breviradiatum (subsequently Peteinosphaeridium breviradiatum), by implication in Eisenack (1969b, p.255), who considered Baltisphaeridium trifurcatum subsp. breviradiatum to be the senior name.

COMMENTS: This combination was not validly published in Eisenack (1958b, p.400), since that author did not fully reference the basionym.

AGE: Ordovician (erratic).


Infraspecific taxa:


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