The minute litter bugs (Heteroptera: Schizopteridae) fauna from the Brazilian Amazon comprises only nine species described during the past four years. In this paper, the Schizopteridae fauna of an Amazonian savanna was surveyed, resulting in the discovery of two new species of Corixidea Reuter and a new species of Schizoptera (Cantharocoris) McAtee & Malloch: Corixidea graziae sp. nov., Corixidea quilombola sp. nov., and Schizoptera (Cantharocoris) savannensis sp. nov. The species C. graziae sp. nov. and C. quilombola sp. nov. can be distinguished from other Corixidea species by the shape of the process of mediotergite 8 while S. (Cantharocoris) savannensis sp. nov. can be recognized among species of its subgenus by a combination of the shape of the subgenital plate and right conjunctival appendage. The species herein described represent the first records of these genera for the Brazilian Amazon. We provide diagnoses, photographs of habitus, and illustrations of male genitalia.

The minute litter bug genus Corixidea Reuter, 1891 currently comprises nine valid American species. Herein, we describe Corixidea quaresmai sp. nov. from one of the last remaining remnants of Atlantic Forest in northeast Brazil. The new species is characterized by the distal extension of the anophoric process parallel and close to the left lateral margin of the tergites, and the elongated process of tergum 8, with a pectinate distal half and a filiform tip. We provide diagnosis, images of habitus and male genitalia.

Schizoptera Fieber is a monophyletic and the largest genus of minute litter bugs (Hemiptera: Heteroptera: Dipsocoromorpha). Its current concept is supported by a recent molecular phylogeny and comprises nearly 90 described extant and two fossil species divided into four subgenera: Schizoptera (Cantharocoris), Schizoptera (Odontorhagus), Schizoptera (Schizoptera) and Schizoptera (Zygophleps). We here taxonomically revise the subgenus Schizoptera (Zygophleps), which so far contains Schizoptera unica McAtee & Malloch, 1925 from Guatemala and Schizoptera corallia Emsley, 1969, Schizoptera simla Emsley, 1969, and Schizoptera ultima Emsley, 1969 from Trinidad. The subgenus is diagnosed by the unique triangular shape of the posterior membranal cell. The following 36 species are here described: Schizoptera aculeata sp.n., Schizoptera applanata sp.n., Schizoptera bella sp.n., Schizoptera biancae sp.n., Schizoptera cassiae sp.n., Schizoptera confusa sp.n., Schizoptera costarriquenha sp.n., Schizoptera cuspida sp.n., Schizoptera ecuadoriana sp.n., Schizoptera elegantissima sp.n., Schizoptera emsleyi sp.n., Schizoptera erosa sp.n., Schizoptera erwini sp.n., Schizoptera falcata sp.n., Schizoptera familia sp.n., Schizoptera furcata sp.n., Schizoptera fuscodorsata sp.n., Schizoptera hirsuta sp.n., Schizoptera inaequalis sp.n., Schizoptera inca sp.n., Schizoptera kayi sp.n., Schizoptera knyshovi sp.n., Schizoptera magnifica sp.n., Schizoptera mallochi sp.n., Schizoptera mcateei sp.n., Schizoptera orellanensis sp.n., Schizoptera paraensis sp.n., Schizoptera peruviana sp.n., Schizoptera pichincha sp.n., Schizoptera pinduca sp.n., Schizoptera prima sp.n., Schizoptera priva sp.n., Schizoptera ramosa sp.n., Schizoptera solitaria sp.n., Schizoptera speira sp.n., and Schizoptera stricta sp.n. The majority of species herein described were collected in Brazil, Costa Rica, and Ecuador, expanding the known distribution of the subgenus. We provide diagnoses, descriptions, photographs of habitus and subgenital plates, line drawings of diagnostic male genitalic features, and a distribution map. A key to species based on males is also presented.