Pelocoris magister Montandon, 1898

Viana, Renata Santos, Franco, Cleilton L., Ramos, Aiala Alana P., Mariano, Rodolfo, Silva De Azevêdo, Carlos A. & Stefanello, Fabiano, 2023, Pelocoris Stål, 1876 of northeastern Brazil (Hemiptera: Heteroptera: Naucoridae) first records and a key to the species, Zootaxa 5375 (2), pp. 193-213 : 198

Pelocoris magister Montandon, 1898

Pelocoris magister Montandon, 1898: 289–290 (original description)

( Figs. 3 , 7C, 7I , 8C , 9C , 10C , 11C , 14 )

Diagnosis: Body length 14–18 mm, large species; hemelytra shiny, without distinct markings throughout ( Fig. 3 ) (Rodrigues et al., unpublished data); third abdominal sternum with a truncated median carina, not spiniform and posteriorly projected ( Fig. 8C ).

Material examined: All specimens macropterous. 1 female, BRAZIL, Bahia, Porto Seguro municipality, RPPN Veracel , 16°23'21.7''S 39°8'44.8''W, 06.IX.2018, Equipe LOA colls., LOA 0002 , C. L. Franco, 2022 det . 1 male and 1 female, Maranhão, Caxias municipality, Areia Branca stream, 5°02'13.9"S 43°29'08.9"W, 13.X.2010, M. B. Aguiar-Neto coll., LEAq 00332, R. S. Viana, 2022 det .; 6 males and 2 females, Areia Branca stream, 5°02'13.9"S 43°29'08.9"W, 28.VIII.2012 and 28.V.2015, LEAq 00333, 00336, 00338, 00345, 00351, R. S. Viana, 2022 det .; 1 male, Buriti stream, 4°54'54"S 43°6'46.8"W, 14. VI.2017, LEAq 00243, R. S. Viana, 2022 det .; 3 males and 5 females, Inhamum stream, 4°53'52.8"S 43°25'58.8"W, 25.VI.2011, 27.III.2012, 29.V.2015, 04.VIII.2015, and 21. VI.2016, LEAq 00237, 00335, 00340, 00343, 00348–00350, R. S. Viana, 2022 det .; 2 males, Inhamum stream, 4°53'52.8"S 43°25'58.8"W, 05. V.2017, LEAq 00223, 00226, F. Stefanello, C. L. Franco, 2022 det .; 2 females, Jatobá stream, 4°54'35.0"S 43°06'60.0"W, 05.X.2017, B. L. S. Carvalho coll., LEAq 00211−00212, C. L. Franco, 2022 det .; 1 male and 1 female, Jatobá stream, 4°54'35.0"S, 43°06'60.0"W, 26.VII.2021, C. L. Franco et al. colls., LEAq 00210, C. L. Franco, 2022 det .; 1 male, Jatobá stream, 4°54'35.0"S 43°06'60.0"W, 26.VII.2021, LEAq 00225, F. Stefanello, 2022 det .; 1 female, Ouro stream, 4°48'05.56"S 43°20'17.68"W, 15.X.2011, LEAq 00238, R. S. Viana, 2022 det .; 1 male, Primavera stream, 4°50'56.4"S 43° 29'42''W, 03.XII.2020, Franco et al. colls., LEAq 00042, C. L. Franco, 2022 det .; 5 males and 9 females, Sumidouro stream, 4°53'24"S 43°25'55.2"W, 29.X.2010, 20.X.2011, 26.III.2012, 03.X.2013, LEAq 00334, 00339, 00337, 00342, 00346, R. S. Viana, 2022 det .; 3 females, Sumidouro stream, 4°53'24"S 43°25'55.2"W, 29.I.2014, 28.VIII.2014, 29.X.2014, LEAq 00222, 00341, 00347, F. Stefanello and R. S. Viana, 2022 det .; 1 male and 2 females, Sumidouro stream, 4°53'24"S 43°25'55.2"W, 04.VIII.2015 and 11.V.2017, LEAq 00240, 00250, 00344, R. S. Viana, 2022 det . 1 male, Codó municipality, Baixa Grande II stream, 4°43'56.0"S 43°42'23.0"W, 05.X.19, C. L. Franco et al. colls., LEAq 00182, C. L. Franco, 2022 det .; 1 female, Buriti Corrente stream, 4°45'11.8"S 43°39'38.3"W, 12. VI.2018, Franco et al. colls., LEAq 00213, C. L. Franco, 2022 det .

Distribution: ARGENTINA ( López-Ruf et al. 2006). BRAZIL ( Montandon 1898): Bahia *, Espírito Santo ( Montandon 1898), Maranhão *, Minas Gerais ( Nieser & Melo 1997; Pelli & Barbosa 1998; Souza et al. 2006), Rio de Janeiro ( Ribeiro et al. 2010) ( Fig. 14 ).

Comments: This species shares some morphological characteristics with P. poeyi and P. b. nigriculus , including the scutellum mostly black without a vermiculate pattern and valvulae 1 entirely dentate along the dorsal and lateral margins ( Figs. 11A, C, D ). They differ in that the lateral margins of male abdominal tergum VII of P. magister are rounded ( Fig. 7C ), whereas in P. b. nigriculus and P. poeyi they are curved ( Figs. 7A, D ). In P. magister , the phallosoma is robust and presents a slight curvature apically ( Fig. 7I ), and female abdominal tergum VIII is trapezoidal with the distal portion with a shallow median concavity ( Fig.10C ). Pelocoris magister can be easily distinguished by its body size; it is the largest species occurring in Brazil.

Figures

FIGURE 3. Dorsal and ventral habitus of Pelocoris magister. (A–B): male; (C–D) female. Scale bar: 2 mm.

FIGURE 7. (A–F): Male abdominal terga VI and VII.A, Pelocoris binotulatus nigriculus; B, P. bipunctulus; C, P. magister; D, P. poeyi; E, P. politus; F, P. subflavus. (G–L): Male genital capsule and phallosoma. G, Pelocoris binotulatus nigriculus; H, P. bipunctulus; I, P. magister; J, P. poeyi; K, P. politus; L, P. subflavus.

FIGURE 8. (A–D): Lateral view of abdominal sterna. A, Pelocoris binotulatus nigriculus; B, P. bipunctulus; C, P. magister; D, P. politus. Arrows indicate condition of median carina at sternum III. (E–F): Dorsal view of abdomen showing the lateral margins. E, P. bipunctulus; F, P. subflavus. Arrows indicate posterolateral corner of tergum III.

FIGURE 9. Female subgenital plate, ventral view. A, Pelocoris binotulatus nigriculus; B, P. bipunctulus; C, P. magister; D, P. poeyi; E, P. politus; F, P. subflavus. Arrows indicate the median concavity of the posterior margin.

FIGURE 10. Female abdominal tergum VIII, dorsal view.A, Pelocoris binotulatus nigriculus; B, P. bipunctulus; C, P. magister; D, P. poeyi; E, P. politus; F, P. subflavus. Arrows indicate different conditions of the posterior margin.

FIGURE 11. Female valvulae 1 and valvulae 2, dorsal view. A, Pelocoris binotulatus nigriculus; B, P. bipunctulus; C, P. magister; D, P. poeyi; E, P. politus; F, P. subflavus. Arrows indicate different conditions in the valvulae.

FIGURE 14. Distribution of Pelocoris magister and P. poeyi in Brazil.