Surculosphaeridium cribrotubiferum subsp. cribrotubiferum

subsp. cribrotubiferum.  Autonym.  Holotype: Sarjeant, 1960a, pl.6, fig.2; text-fig.1; Stancliffe and Sarjeant, 1990, text-fig.3, nos.4,6; Fauconnier and Masure, 2004, pl.73, figs.9–10.

Parent: Surculosphaeridium cribrotubiferum