Neotropical Nilothauma Kieffer, 1921 (Diptera, Chironomidae): Key, eleven new species, re-descriptions, new combination and new records Author Pinho, Luiz Carlos https://orcid.org/0000-0002-9153-9997 Laboratory of Systematics of Diptera, Department of Ecology and Zoology, Federal University of Santa Catarina, Campus Trindade, CEP 88040 - 900, Florianopolis, Brazil luizcarlospinho@gmail.com Author Andersen, Trond Department of Natural History, University Museum of Bergen, University of Bergen, P. O. Box 7800, NO- 5020, Bergen, Norway text ZooKeys 2021 2021-04-22 1033 81 125 http://dx.doi.org/10.3897/zookeys.1033.60686 journal article http://dx.doi.org/10.3897/zookeys.1033.60686 1313-2970-1033-81 BEFB015F4A354987AD10DFEB7D4F91DD 2E6467D3D0025F778A77798A4072BCB5 Nilothauma calori Mendes & Andersen, 2009 Figures 2A , 16C Additional material. 1 male , slide-mounted: Brazil , Amazonas , Manaus , Reserva Florestal Adolfo Ducke , Igarape Bolivia , 02°49'15"S , 59°56'31"W , 9-12.xi.2008 , Malaise trap suspensa 2, N. Hamada et al. leg . 2 males , slide-mounted: Brazil , Mato Grosso , Cuiaba , 10-11.x.1965 , Brundin net , E.J. Fittkau leg. (A 580, ZSM) . Remarks. Mendes and Andersen (2009) stated that the superior volsella has a "lateral strongly sclerotized, spine-like projection". In dorsolateral view (Fig. 2A ), it can be seen that this spine-like projection originates from the base of the volsella and is equally long as the volsella proper. Figure 2. Variation in superior volsella A dorsolateral view of superior volsella of Nilothauma calori Mendes & Andersen, 2009 B lateral view of superior volsella of Nilothauma complicatum Mendes & Andersen, 2009. Distribution (Fig. 16C ). The species was originally described from Acre State by Mendes and Andersen (2009) ; the range is now extended to the Mato Grosso and Amazonas States.