Albaillellaria from the New England orogen, Eastern NSW, Australia

Radiolarian data provide important age constraints on the development of terranes within the New England orogen and have implications for existing tectonic models. Most radiolarian assemblages recovered from the orogen are of Late Devonian to Early Carboniferous ages. Albaillellaria comprise a minor proportion of the faunas present but have major biostratigraphic significance.Holoeciscus Foreman,Helenifore Nazarov and Ormiston,Circulaforma Cheng,Ceratoikiscum Deflandre,Protoalbaillella Cheng, andAlbaillella Deflandre, two new genera and three new species are found at various stratigraphic levels. Eleven radiolarian assemblages are recognised. In stratigraphic order these are theHelenifore laticlavium-Ceratoikiscum planistellare, Protoholoeciscus hindea, Holoeciscus formanae, Paraholoeciscus bingaraensis,Ceratoikiscum umbraculum, Protoalbaillella anaiwanensis, Albaillella paradoxa, Albaillella undulata-Albaillella indensis,Albaillella indensis-Albaillella furcata, Albaillella cartalla-Albaillella thomasi andCirculaforma omicron assemblages. There is an apparent biostratigraphic succession amongst the Albaillellaria in the New England orogen in whichProtoholoeciscus hindea n. gen. n. sp. is transitional betweenCeratoikiscum Deflandre andHoloeciscus Foreman andParaholoeciscus bingaraensis n. gen. n. sp. is transitional betweenHoloeciscus Foreman and theAlbaillella paradoxa Deflandre group.