Etheridge, R. 1902. A monograph of the Cretaceous invertebrate fauna of New South Wales. Memoirs of the Geological Survey of New South Wales, Palaeontology 11: 1-98. Available electronically.
Etheridge, 1902. Mem. Geol. Surv. N.S. Wales, Paleont. 11: 28.
Type species: Unicardium meeki Etheridge in Jack & Etheridge, 1892 = Cyrenopsis meeki
Etheridge, 1902. Mem. Geol. Surv. N.S. Wales, Paleont. 11: 29-30, pl. 5, 12-17.