Areosphaeridium diktyoplokum subsp. latum

"subsp. latum" (Klumpp, 1953, p.392, pl.18, figs.8–10) Lentin and Williams, 1973, p.16.  Emendation: Sarjeant, 1981, p.106–107, as Plethysyrinx lata — however, see Lentin and Williams (1985, p.72).  Holotype: Klumpp, 1953, pl.18, figs.8–9.  NOW Cordosphaeridium latum.  Originally Hystrichosphaeridium diktyoplokum subsp. latum, subsequently Cordosphaeridium diktyoplokum subsp. latum, thirdly Areosphaeridium diktyoplokum subsp. latum, fourthly Plethysyrinx? lata, fifthly (and now) Cordosphaeridium latum.  Age: Eocene.

Parent: Areosphaeridium diktyoplokum