Exochosphaeridium bifidum var. involutum
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"var. involutum" Davey, 1969c, p.29, pl.2, figs.1-3. Emendation: Marheinecke, 1992, p.52, as Exochosphaeridium bifidum subsp. involutum. Holotype: Davey, 1969c, pl.2, fig.3. Originally Exochosphaeridium bifidum var. involutum, subsequently Exochosphaeridium bifidum subsp. involutum. Taxonomic senior synonym: Hystrichosphaeridium (now Exochosphaeridium) majus according to Peyrot (2011, p.284). The possibility of this synonymy was earlier postulated by Marheinecke (1992, p.51). Age: Campanian-Maastrichtian.
Parent: Exochosphaeridium bifidum