Martarega membranacea White 1879: 272 [original description]. Survey of the Notonectidae (Insecta, Hemiptera, Heteroptera, Nepomorpha) from northeastern Brazil Jordão, Rafael Barbosa, Julianna Freires Moreira, Felipe Ferraz Figueiredo ZooKeys 2025 2025-04-01 1233 245 288 3Y9S2 White, 1879 White 1879 Insecta Notonectidae Martarega Animalia Hemiptera Arthropoda species membranacea   Fig. 10 S      Martarega membranacea  White 1879: 272[original description].   Diagnosis. Small species, male length 4.1–4.2 mm. Ocular commissure longer than 1 / 2 of eye width. Scutellum with 1 / 2 of its length hyaline. Ventral surface of middle trochanter smooth. Hemelytra of brachypterous specimens with claval commissure expanded, hyaline, reaching the anterior margin of membrane; medial longitudinal hyaline stripe very wide, sinuous, with same width from base of hemelytra up to coastal margin in membrane suture; hemelytral process stripe large, 20–30 % of hemelytral length; hemelytral process slightly longer than membrane length (Fig. 9 C)   Taxonomic notes. This species can be distinguished from  M. chinaiHynes, 1948, the most similar congener, by the longer posterior hemelytral process and by the absence of a pubescent nodule on the middle trochanter.   Distribution.  Argentina( López-Ruf et al. 2003). Bolivia( Truxal 1949). Brazil:  AM( White 1879; Truxal 1949; Nieser 1970; Pereira and Melo 2007; Barbosa et al. 2012; Barbosa and Rodrigues 2013), BA[new record], GO( Nieser 1970; Barbosa and Dias-Silva 2017),  MG( Melo and Nieser 2004; Barbosa and Rodrigues 2013), MS( Floriano et al. 2013),  MT( Barbosa and Giehl 2014), PA( Truxal 1949; Nieser 1970; Andrade 1992; Barbosa et al. 2012), RJ( Ribeiro et al. 2010), RO( Truxal 1949), SE[new record], SP( Castanhole et al. 2013; Pereira et al. 2015 a), TO( Truxal 1957). Colombia( Roback and Nieser 1974). Ecuador( Kirkaldy 1899 c). Guyana( Truxal 1949). Suriname( Nieser 1968).   Material examined.   Brazil,! BA, 2018: 2 ♂, 11 ♀: Lençóis municipality,  PNCD, Água 10 station,  22. VIII. 2018.  -12.6008, -41.3811, J. M. S. Rodrigues& F. F. F Moreiracols.,  CEIOC81934.!  SE, 2018: 3 ♂, 3 ♀, 2 nymphs: Pirambu municipality,  RBSI, RebioSI 5,  01. V. 2018.  -10.6515, -36.7571. C. F. B. Floriano, J. M. S. Rodrigues& O. M. Magalhãescols.,  CEIOC81662. 5105709424 2018-08-22 CEIOC J. M. S. Rodrigues & F. F. F Moreira Brazil -12.6008 Agua 10 station 7 -41.3811 Lencois municipality CEIOC 81934 13 11 2 5105709504 2018-05-01 CEIOC C. F. B. Floriano & J. M. S. Rodrigues & O. M. Magalhaes Brazil -10.6515 RebioSI 5 7 -36.7571 Pirambu municipality CEIOC 81662 6 3 3