Oligosphaeridium irregulare

"irregulare" (Pocock, 1962, p.82, pl.15, figs.228–229) Davey and Williams, 1969, p.5.  Holotype: Pocock, 1962, pl.15, figs.228–229, lost according to Jansonius (1986, p.220).  Lectotype: Jansonius, 1986, pl.4, fig.3, designated by Jansonius (1986, p.214 — caption to pl.4); Fauconnier and Masure, 2004, pl.55, fig.9.  Originally Hystrichosphaeridium, subsequently Oligosphaeridium.  Taxonomic senior synonym: Hystrichosphaeridium (as Oligosphaeridium) albertense, according to Jansonius (1986, p.213).  Taxonomic junior synonyms: Hystrichosphaeridium (as Oligosphaeridium?) coelenteratum, Hystrichosphaeridium (as Oligosphaeridium?) dispare, Hystrichosphaeridum (as Oligosphaeridium) reniforme, all according to Stover and Evitt (1978, p.69).  This combination, as a questionable assignment, was not validly published in Davey and Williams (1966b, p.77), since these authors did not fully reference the basionym.  Fauconnier and Cornu in Fauconnier and Masure (2004, p.404) listed this as a problematic species but apparently accepted the synonymy cited above.  Age: late Barremian–Aptian.

Parent: Oligosphaeridium