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- Holotype: represented by the microfossil spicule cited in Hinde & Holmes (1892: 217, Pl. 7, Fig. 51).
- Type locality: Oamaru Diatomite member of the Waiareka Volcanic Formation at three possible locations in the Oamaru District: Cormacks Siding, near Weston (NZ Fossil Record Locality J41/f8888); Jackson’s Paddock, Spring Hill Road, near Weston (NZ Fossil Record Locality J41/f8914); Bain’s Farm, near Weston (NZ Fossil Record Locality J41/f8059).