Difference between revisions of "Heterosphaeridium heteracanthum"

<B><I>heteracanthum</I></B> ([[Deflandre and Cookson, 1955]], p.276, pl.2, figs.5-6; text-figs.40-41) [[Eisenack and Kjellstr&#246;m, 1972]], p.451.&nbsp; Emendation: [[Radmacher et al., 2014]], p.33,36, as <I>Heterosphaeridium heteracanthum</I>.&nbsp; Holotype: [[Deflandre and Cookson, 1955]], pl.2, fig.5; [[Fauconnier and Masure, 2004]], pl.35, figs.7-8.&nbsp; Originally <I>[[Hystrichosphaeridium heteracanthum|Hystrichosphaeridium]]</I>, subsequently <I>[[Baltisphaeridium heteracanthum Appendix A|Baltisphaeridium]]</I> (Appendix A), thirdly <I>[[Cleistosphaeridium heteracanthum|Cleistosphaeridium]]</I>, fourthly (and now) <I>Heterosphaeridium</I>, fifthly <I>Heterosphaeridium</I>?  Questionable assignment: [[Stover and Evitt, 1978|Stover and Evitt (1978]], p.52); however, Fauconnier and Begou&#235;n in [[Fauconnier and Masure, 2004|Fauconnier and Masure (2004]], p.269) considered that this species should be assigned to <I>Heterosphaeridium</I> without question.&nbsp; Age: ?Late Cretaceous-Early Eocene.