Nematosphaeropsis rigida Wrenn, 1988, p.144,146,148, pl.2, figs.1-6; pl.3, fig.4; pl.4, figs.1-5; pl.6, figs.3-4.
TYPE: Holotype: Wrenn, 1988, pl.2, figs. 1-6.
AGE: Miocene-Holocene.