Hystrichosphaeridium collum

?collum Tasch in Tasch et al., 1964, p.194, pl.2, figs.7,16.  Holotype: Tasch et al., 1964, pl.2, figs.7,16; Fauconnier and Masure, 2004, pl.43, figs.11–12.  Originally Hystrichosphaeridium, subsequently (and now) Hystrichosphaeridium?.  Questionable assignment: Stover and Evitt (1978, p.56) as a problematic species.  Age: Albian.

Parent: Hystrichosphaeridium