Stridulivelia ayacucho Polhemus & Spangler, 1995

Magalhães, Oséias Martins, Nery, Leticia, Moller, Hermann, Pavarini, Ronaldo, Bertini, Giovana & Moreira, Felipe Ferraz Figueiredo, 2020, Semiaquatic bugs (Insecta, Heteroptera, Gerromorpha) from Vale do Ribeira, São Paulo state, Brazil, Check List 16 (2), pp. 349-359 : 356-358

Stridulivelia ayacucho Polhemus & Spangler, 1995 Figures 12, 13

New record. BRAZIL • 1 ♂, 1♀; São Paulo, Vale do Ribeira, Sete Barras , station 3; 24°17′31″S, 048°06′29″W; 7 Feb. 2013; G. Bertini et al. leg.; CEIOC 74828 .

Identification. Our material was identified based on the key provided by Floriano et al. (2017). The two specimens above have pronotal humeral angles rounded, not spinose; stridulatory structure on laterotergites formed by a row of widely separated knob-like denticles; and hind femur incrassate, about 2.5 times wider than middle femur, with a spine on distal two-thirds of posterior margin distinctly larger than others. 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 midline.

Known distribution. Argentina, Bolivia, Brazil, Guyana, Paraguay, Peru, Venezuela ( Floriano et al 2017).

Distribution in Brazil. Minas Gerais ( Melo and Nieser

2004), Pará ( Polhemus and Spangler 1995), São Paulo (Moreira and Barbosa 2011; this work).