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).
- Kelly, M., Erpenbeck, D., Morrow, C. & Van Soest, R. 2015 First record of a living species of the genus Janulum (Class Demospongiae) in the Southern Hemisphere. Zootaxa 3980(2): 255–266. DOI: 10.11646/zootaxa.3980.2.6. Preview (PDF). Reference page.