Astraea Roding, 1798, p. 69 (type species (subsequent designation, Suter, 1913): Trochus imperialis Gmelin, 1791 = Trochus heliotropium Martyn, 1784, valid I.C.Z.N. Opin. 479) is a distinctive group of Turbinidae with a low spire, a widely open umbilicus, a narrowly reflected inner-lip callus, and a relatively thin, flat operculum. In New Zealand, the living A. heliotropium (Martyn) has a fossil history in late Lower Miocene to Pleistocene rocks, A. bicarinata Suter, 1917 occurs in Lower Miocene rocks, and 3 unnamed species occur in Upper Eocene, Oligocene, and early Miocene rocks. In Australia, A. johnstoni (Pritchard, 1896) occurs in Upper Eocene rocks, A. hudsoniana (Johnston, 1888) occurs in early Miocene rocks, and a species from Upper Miocene rocks is unnamed. Only these eight species belong in Astraea (sensu stricto).