Description: L. 20.4–22.2um, Br. 17.4–19.6um, Isth. 6.1–7.9um, L:Br. 1.17. Specimens seen in the sample agreed very well with that of Wolle (1884, p.73, pl XVIII fig.33). Each cell had one semicell that was slightly smaller than the other. The apex is four-undulate and the lateral margins have two small crests and a depression between. In end view the semicells show a slightly inflated mid region with three indistinct low crenae. (Dingley 2001)

State distribution in Australia, based on available literature

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