Baltisphaeridium Appendix A
BALTISPHAERIDIUM Eisenack, 1958a, p.398-399. Emendations: Staplin et al., 1965, p.188; Eisenack, 1969b, p.249; Eiserhardt, 1989, p.88-90. Acritarch genus. Although the "type species", Baltisphaeridium longispinosum, was not validly transferred by Eisenack (1958a, p.398), the generic name Baltisphaeridium was validly published since it is based on a previously validly published specific name (I.C.B.N. Article 37.2). For synonymy see Fensome et al. (1990, p.82-83). Type: Eisenack, 1931, pl.5, fig.10, as Ovum hispidum subsp. longispinosum.