Redlichia of the Ordian (Cambrian) of northern Australia and New South Wales

The systematic part of this paper is the continuation of my study (bpik, 1958) of the anatomy and concept of the genus Redlichia, presented on the basis of Redlichia forresti from the Negri Group of Western Australia, Redlichia idonea from the Yelvertoft Beds of Queensland, and some other, then unnamed, species. At that time (op. cit., p. 36) the taxonomy of the species was reserved for the future. This paper serves a double purpose-first, in presenting such speciestaxa as can be established from selected and properly preserved material, and second, in establishing a sequence of informal 'biostratigraphic operational units' in advance of a scale of Ordian zones. Such a scale of zones would be premature in view of the difference between the specific composition of Redlichia in Queensland and in the Northern Territory, and because of the incompleteness of data regarding the vertical distribution and specific taxonomy of Redlichia in many sites of the Territory, and the numerous undescribed other fossils of the Ordian of Australia. The fossils are kept in the Museum of the Bureau of Mineral Resources and the specimen numbers (CPC) refer to the Commonwealth Palaeontological (type) Collection.