- GeoRef, Copyright 2004, American Geological Institute. Reference includes data supplied by Institute of Geological and Nuclear Sciences (SIRIS), Lower Hutt, New Zealand
The palmate nodosariid Frondicularia rakauroana (Finlay) is reported from upper Campanian through lower Maestrichtian sediments of the Lopez de Bertodano Formation on Seymour Island, within the James Ross Island basin (Antarctic Peninsula). Hitherto, distribution of this distinctive taxon has been confined to the upper Haumurian Stage (Maestrichtian) of New Zealand and the Lord Howe Rise (DSDP Site 208). Frondicularia rakauroana may have had a diachronous distribution, being first recognized in upper Campanian strata on Seymour Island and occurring in younger sediments on Lord Howe Rise and New Zealand. Restriction of this species to the southern high latitudes provides support for the presence of a southern marine faunal realm or province during the Late Cretaceous. Furthermore, the restriction of F. rakauroana to the three localities cited points to some form of marine communication around the southern Pacific margin of Antarctica or through trans-Antarctic passages.