A continental shelf to upper continental slope ostracod fauna is documented from the late Cretaceous (late Turonian to Santonian) Belfast Mudstone in Voluta-1 of the Otway Basin, southeastern Australia. The fauna has palaeobiogeographical affinities with mid-late Cretaceous ostracod faunas of Western Australia, New Zealand, the Antarctic Peninsula and the Falklands Plateau. This distribution pattern probably reflects dispersal influenced by the opening of the Australo-Antarctic Gulf, and by clockwise gyre currents in the proto Southern Ocean. The presence of Philoneptunus sp. in this fauna suggests that the Australo-Antarctic Gulf was an important locus for deep sea colonization by Gondwanan neritic ostracod clades.

Mark T. Warne* [mwarne@deakin.edu.au], Deakin University, Geelong, School of Life and Environmental Sciences & Centre for Integrative Ecology (Melbourne Campus), 221 Burwood Highway, Burwood, Victoria 3125 Australia. Stephen J. Gallagher [sjgall@unimelb.edu.au] School of Earth Sciences, The University of Melbourne, Melbourne, 3010 Australia.

在澳大利亚东南部奥特韦盆地的Voluta-1，从晚白垩世（晚突尼斯至桑顿期）贝尔法斯特泥岩记录了一个大陆架到上大陆斜坡的兽类动物群。该动物区系与西澳大利亚，新西兰，南极半岛和福克兰高原的白垩纪中晚期成龙类动物区系具有古生物地理亲和力。这种分布模式可能反映了南极澳大拉西亚海峡的开放以及原始南大洋中的顺时针回转流的影响。Philoneptunus sp。的存在。该动物群中的动物表明，南极海湾是冈瓦纳人带状线虫纲进化为深海定殖的重要场所。

Mark T. Warne * [mwarne@deakin.edu.au]，迪肯大学，吉朗，生命与环境科学学院和整合生态中心（墨尔本校区），221 Burwood Highway，Burwood，维多利亚3125澳大利亚。Stephen J. Gallagher [sjgall@unimelb.edu.au]澳大利亚墨尔本大学墨尔本大学地球科学学院，澳大利亚3010。