QUADRISCUTELLA GEN-NOV (BRYOZOA, CHEILOSTOMATA) FROM THE TERTIARY ANDRECENT OF VICTORIA AND SOUTH-AUSTRALIA

Quadriscutella gen. nov. is introduced for Q. papillata sp. nov., an e rect, branching, nodal Recent species from South Australia, belonging to a complex of forms which is otherwise known only from Tertiary loca lities in Victoria and South Australia. The species complex, members o f which have usually been known as 'Hippoporina burlingtoniensis', has been analysed and found to comprise five taxa: Q. papillata sp. nov., the Recent form, together with Q. burlingtoniensis (Waters) sensu str icto, Q. costata (Maplestone), Q. clavata (Maplestone), and Q. punctat a sp. nov., all of which are known only as Tertiary fossils. The morph ology of Quadriscutella has similarities with that of both Tropidozoum Harmer (1957) and Neoeuthryis Bretnall (1921), and the genus is there fore assigned with them to the family Euthyrisellidae Bassler.