1. The type Wenlock Series;Bassett;Rep. Inst. Geol. Sci.,1975
2. Lower Palaeozoic acritarchs;Cramer;Palinología,1979
3. Hystrichospheres from the Silurian Wenlock Shale of England;Downie;Palaeontology,1959
4. Deunffia and Domasia, new genera of hystrichospheres;Downie;Micropaleontology,1960
5. ‘Hystrichospheres’ (acritarchs) and spores of the Wenlock Shales (Silurian) of Wenlock, England;Downie;Palaeontology,1963