Revision of the South American species of Austrothaumalea Tonnoir (Diptera Thaumaleidae) Author Pivar, Robert J. 0000-0003-2642-0524 The University of Tennessee, Department of Entomology and Plant Pathology, 2505 E. J. Chapman Drive, 370 Plant Biotechnology Building, Knoxville, Tennessee, 37996, U. S. A. & robertjpivar @ gmail. com; https: // orcid. org / 0000 - 0003 - 2642 - 0524 robertjpivar@gmail.com Author Sinclair, Bradley J. 0000-0001-6413-1606 Canadian National Collection of Insects and Canadian Food Inspection Agency, K. W. Neatby Building, C. E. F., 960 Carling Avenue, Ottawa, Ontario, Canada K 1 A 0 C 6. bradley. sinclair @ canada. ca; https: // orcid. org / 0000 - 0001 - 6413 - 1606 bradley.sinclair@canada.ca Author Moulton, John K. 0000-0001-8760-3274 The University of Tennessee, Department of Entomology and Plant Pathology, 2505 E. J. Chapman Drive, 370 Plant Biotechnology Building, Knoxville, Tennessee, 37996, U. S. A. & jmoulton @ utk. edu; https: // orcid. org / 0000 - 0001 - 8760 - 3274 text Zootaxa 2020 2020-09-24 4853 4 509 526 journal article 8413 10.11646/zootaxa.4853.4.2 0ffa72e0-c3b8-4c3c-8b64-a39dab962daa 1175-5326 4411060 948793DC-3873-4C14-8239-E30ED790E56A Genus Austrothaumalea Tonnoir Austrothaumalea Tonnoir, 1927: 109 . Type-species: Austrothaumalea neozealandica Tonnoir (original designation). Oterere McLellan, 1988: 573 . Type-species: Oterere oliveri McLellan (original designation) syn. nov. Diagnosis. Austrothaumalea is characterized as follows: absence of a distinct antealar ridge; proepisternal setae present; microtrichia of R 1 (+R 2+3 ) extending length of vein; R 2+3 crossvein usually situated closer to apex of R 1 (+R 2+3 ) than to origin of R 4+5 ; R 4+5 often with arch strongly produced; basal spur of CuA often present; gonocoxites slender, longer than wide; hypandrium broad; parameres fused medially. Distribution. Argentina , Chile , New Caledonia , New Zealand and Australia (including Tasmania ). Notes on synonymy. McLellan (1988) erected the genus Oterere to include two species, O. oliveri McLellan and O. setipennis (Edwards) . Sinclair (2008a ,b) questioned the validity of the genus as several purported diagnostic characters (a well-developed spur on CuA, macrotrichia on R 4+5 and patterned wings) are also found in species of Austrothaumalea . Oterere is synonymized on the basis of these shared characters and through molecular data (unpublished data). The following taxonomic changes are proposed: Austrothaumalea oliveri (McLellan), 1988: 573 ( Oterere ) comb. nov. Austrothaumalea setipennis Edwards, 1930: 113 ( Austrothaumalea ) stat. rev. Key to adult males of South American species of Austrothaumalea 1 Macrotrichia present on dorsal surface of wing vein M 1............................... A. setipennis Edwards stat. rev. - Macrotrichia absent on wing vein M 1 ( Fig. 2 )............................................................... 2 2 Epandrium with posterolateral projections ( Figs 4A , 5A )....................................... A. apicalis Edwards - Epandrium without posterolateral projections ( Figs 4 B–E, 5B–E)............................................... 3 3 Paramere spatulate, without lateral projections ( Figs 4E , 5E ).................................... A. spatulata Schmid - Paramere cruciate, with lateral projections ( Figs 4B,C 5B,C )................................................... 4 4 Lateral projections on paramere located toward apex, extended beyond apex of gonocoxal plate ( Figs 4B , 5B )............................................................................................... A. chilensis Edwards - Lateral projections on paramere located at mid-length, dorsal to gonocoxal plate ( Figs 4C , 5C )........................................................................................................ A. fredericki Pivar sp. nov.