Stridulivelia ayacucho Polhemus & Spangler, 1995

Lima Franco, Cleilton, Mourão dos Santos Rodrigues, Juliana, Silva de Azevêdo, Carlos Augusto & Moreira, Felipe Ferraz Figueiredo, 2021, Gerromorpha (Insecta, Hemiptera, Heteroptera) from eastern Maranhão state, northeastern Brazil, Check List 17 (2), pp. 551-568 : 566

Stridulivelia ayacucho Polhemus & Spangler, 1995 Figure 12E–J

New records. BRAZIL • 3 ♂; Maranhão, Codó , Baixa Grande II stream; −04.73222, −043.70638, 05 Oct. 2019; C.L. Franco et al. leg.; LEAq 00197 • 1 ♀; Maranhão, Caxias, Barragem stream; −04.87562, −043.09894; 10 Dec. 2019; C.L. Franco et al. leg.; LEAq 00284 • 1 ♀; Ma- ranhão, Caxias, Jatobá stream; −04.90972, −043.11666; 28 Aug. 2019; C.L. Franco et al. leg.; LEAq 00135 .

Identification. The specimens above differ from S.

astralis by the stridulatory structure on the lateral margin of the laterotergites formed by a row of widely separated knob-like denticles ( Fig. 12G, J). The male has the venter of abdominal segment VIII centrally expanded but not forming a lobule, and the female has short posterior projections on the dorsum of abdominal segment VIII, with about one-third the length of the segment at the midline ( Floriano et al. 2017).

Distribution in Brazil. PA, MA*, MT, MG, SP.