- GeoRef, Copyright 2004, American Geological Institute. Reference includes data supplied by Institute of Geological and Nuclear Sciences (SIRIS), Lower Hutt, New Zealand
Arachnodinium antarcticum gen. et sp. nov., a distinctive trabeculate dinoflagellate cyst, is described from erratics of probable Eocene Age in the McMurdo Sound area. Additional records of the taxon are provided from Lower Tertiary localities in South America, from DSDP sites in the south Tasman Sea, and from other Antarctic localities.