Gerromorpha (Insecta, Hemiptera, Heteroptera) from eastern Maranhão state, northeastern Brazil Lima Franco, Cleilton Mourão dos Santos Rodrigues, Juliana Silva de Azevêdo, Carlos Augusto Moreira, Felipe Ferraz Figueiredo Check List 2021 2021-03-17 17 2 551 568 334B3 Drake & Harris, 1934 Drake & Harris 1934 [168,708,1857,1882] Insecta Gerridae Cylindrostethus Animalia Hemiptera 3 554 Arthropoda species palmaris   New records.  BRAZIL• 2 ♂; Maranhão, Duque Bacelar, Araimstream; −04.16861, −042.99277;  14 Jul. 2019; C.L. Francoet al. leg.; LEAq 00012•  26 ♂, 14 ♀; Maranhão, Caxias, Areia Brancastream; − 05.03720S, −043.48580;  13 Aug. 2019; C.L. Francoet al. leg.; LEAq 00055•   1 ♂, 1 ♀; Maranhão, Caxias, Baixa Grandestream; −04.75722, −043.66055;  06 Aug. 2019; C.L. Francoet al. leg.; LEAq 00029•  3 ♂, 1 ♀; Maranhão, Codó, Baixa GrandeII stream; −04.73222, −043.70638;  05 Oct. 2019; C.L. Francoet al. leg.; LEAq 00191, 00193•  2 ♂, 1 ♀; Maranhão, Caxias, Barragemstream; −04.87562, −043.09894;  10 Dec. 2019; C.L. Francoet al. leg.; LEAq 00238•  5 ♂, 1 ♀; Maranhão, Caxias, Batatalstream; −04.96166, −043.38916;  07 Aug. 2019; C.L. Francoet al. leg.; LEAq 00009•  3 ♂, 1 ♀; Maranhão, Caxias, Bu- riti stream; −04.91500, −043.11333;  28 Aug. 2019; C.L. Francoet al. leg.; LEAq 00159, 00165•  3 ♂, 1 ♀; Maran- hão, Caxias, Cajazeirasstream; −05.01750, −043.42944;  07 Aug. 2019; C.L. Francoet al. leg.; LEAq 00030•  2 ♂, 7 ♀; Maranhão, Caxias, Correntinhostream; −04.82666, −043.37694;  26 Aug. 2019; C.L. Francoet al. leg.; LEAq 00057, 00064, 00071, 00077•  29 ♂, 31 ♀; Maranhão, Caxias, Inhamumstream; −04.89833, −043.43333;  26 Aug. 2019; C.L. Francoet al. leg.; LEAq 00020–00024, 00085, 00091•  19 ♂, 11 ♀; Maranhão, Caxias, Jatobástream; −04.90972, −043.11666;  28 Aug. 2019; C.L. Francoet al. leg.; LEAq 00121, 00128, 00136, 00141, 00144•  1 ♂; Maranhão, Merim Lagoon; −04.89861, −043.44027;  13 Aug. 2019; C.L. Francoet al. leg.; LEAq 00051•  26 ♂, 11 ♀; Maranhão, Caxias, Lamegostream; −04.81527, −043.34361;  12 Aug. 2019; C.L. Francoet al. leg.; LEAq 00032, 00036, 00038•  3 ♂, 2 ♀; Mara- nhão, Caxias, Limpezastream; −04.67611, −043.54222;  27 Aug. 2019; C.L. Francoet al. leg.; LEAq 00092, 00101•  8 ♂, 9 ♀; Maranhão, Caxias, Planaçucarstream; −04.90666, −043.36250;  12 Aug. 2019; C.L. Francoet al. leg.; LEAq 00045–00046, 00049•  6 ♂ 2 ♀; Maranhão, Aldeias Altas, Poçãostream; −04.67388, −043.54138;  27 Aug. 2019; C.L. Francoet al. leg.; LEAq 00200, 00220•  4 ♂, 2 ♀; Maranhão, Caxias, Primaverastream; −04.84916, −043.49527;  06 Aug. 2019; C.L. Francoet al. leg.; LEAq 00002, 00173•  14 ♂, 10 ♀; Maranhão, Cax- ias, Sumidourostream; −04.88972, −043.43166;  05 Aug. 2019; C.L. Francoet al. leg.; LEAq 00027–00028.   Figure 4.Sampling sites. A–D.Streams. A.Primavera. B.Pedra. C.Sumidouro. D.Saco River. E–G.Lakes. E.Araim. F.Cheio d’água. G.Do Merim.   Identification.  Cylindrostethus palmarisis the onlySouth American species of the genus that displays wing dimorphism, with apterous and macropterous morphs ( Fig. 5H, J). Other species from the continent are entirely apterous, which makes identification of winged specimens immediate ( Floriano et al. 2016). Our apterous specimens were identified based on the body mostly yellow; the lateral black stripes of the mesonotum as wide as the median yellow stripe ( Fig. 5H); the black fore tibia; the posterior margin of male abdominal sternum VII emarginated at the middle ( Fig. 5I); and the basolateral processes of the male proctiger distinctly shorter than wide ( Floriano et al. 2016).   Distribution in Brazil.RR, AP, AM, PA, RO, MA, RN, BA, MT, GO, MS, MG, ES, SP, RJ.   Comments.Previously recorded in Maranhãofrom the municipalities of Timon and Imperatriz ( Rodrigues et al. 2012; Floriano et al. 2016). Subfamily Gerrinae Tribe Gerrini   LimnogonusStål, 1868 2019-07-14 C. L. Franco Brazil -4.16861 Araim 1 -42.99277 Duque Bacelar 3 554 2 2 Maranhao 2019-08-13 C. L. Franco Brazil -5.0372 Areia Branca Caxias 3 554 40 14 26 Maranhao 2019-08-06 C. L. Franco -4.75722 Baixa Grande 1 -43.66055 Caxias 3 554 2 1 1 Maranhao 2019-10-05 C. L. Franco -4.73222 Baixa Grande 1 -43.70638 Codo 3 554 4 1 3 Maranhao 2019-12-10 C. L. Franco -4.87562 Barragem 1 -43.09894 Caxias 3 554 3 1 2 Maranhao 2019-08-07 C. L. Franco -4.96166 Batatal 1 -43.38916 Caxias 3 554 6 1 5 Maranhao 2019-08-28 C. L. Franco -4.915 Caxias 1 -43.11333 3 554 4 1 3 Maranhao 2019-08-07 C. L. Franco -5.0175 Cajazeiras 1 -43.42944 Caxias 3 554 4 1 3 Maranhao 2019-08-26 C. L. Franco -4.82666 Correntinho 1 -43.37694 Caxias 3 554 9 7 2 Maranhao 2019-08-26 C. L. Franco -4.89833 Inhamum 1 -43.43333 Caxias 3 554 60 31 29 Maranhao 2019-08-28 C. L. Franco 4 555 -4.90972 Jatoba 1 -43.11666 Caxias 3 554 30 11 19 Maranhao 2019-08-13 C. L. Franco -4.89861 Merim Lagoon 1 -43.44027 4 555 1 1 Maranhao 2019-08-12 C. L. Franco -4.81527 Lamego 1 -43.34361 Caxias 4 555 37 11 26 Maranhao 2019-08-27 C. L. Franco -4.67611 Limpeza 1 -43.54222 Caxias 4 555 5 2 3 Maranhao 2019-08-12 C. L. Franco -4.90666 Planacucar 1 -43.3625 Caxias 4 555 17 9 8 Maranhao 2019-08-27 C. L. Franco -4.67388 Pocao 1 -43.54138 Aldeias Altas 4 555 8 2 6 Maranhao 2019-08-06 C. L. Franco -4.84916 Primavera 1 -43.49527 Caxias 4 555 6 2 4 Maranhao 2019-08-05 C. L. Franco -4.88972 Sumidouro 1 -43.43166 4 555 24 10 14 Maranhao