Lineostethus sinuosus, 2018

Garbelotto, Thereza de Almeida, Kochenborger, Ana Paula Leite & Campos, Luiz Alexandre, 2018, Revision of Lineostethus (Heteroptera: Pentatomidae: Discocephalini), Zoologia (e 21232) 35, pp. 1-24 : 5

Key for females of Lineostethus Ruckes, 1966

1 Posterior margin of gonocoxites VIII sinuous ( Figs 51–52, 68, 76: gcVIII)................................................................... 2

1’ Posterior margin of gonocoxites VIII convex or subrectilinear ( Figs 17, 25, 35, 43, 60: gcVIII) ................. 4

2(1) Gonocoxites VIII subtriangular; posterior margin of gonocoxites VIII strongly sinuous; sutural angles of gonocoxites VIII apart from each other and little projected over the laterotergites IX; lateral angles of gonocoxitesVIII little projected over the base of the laterotergites VIII ( Figs 51–52: gcVIII, la8, la9, s) .................................................... ... L. sinuosus Kochenborger & Garbelotto sp. nov. ( Fig. 5)

2’ Gonocoxites VIII subrectangular; posterior margin of gonocoxites VIII weakly sinuous; sutural angles of gonocoxites VIII juxtaposed; lateral angles of gonocoxites VIII uniformly convex or truncated ( Figs 68, 76: gcVIII, la8, la9, s)......................................................................... 3

3(2’) Posterior margin of urosternite VII uniformly concave; lateral angles of gonocoxites VIII uniformly convex ( Fig. 76: VII, gcVIII).................................................................... ...... L. auritus Garbelotto & Kochenborger sp. nov. ( Fig. 8)

3’ Posterior margin of urosternite VII subrectilinear medially; lateral angles of gonocoxites VIII truncated ( Fig. 68: VII, gcVIII)................................................................................. ....... L. otarus Garbelotto & Kochenborger sp. nov. ( Fig. 7)

4(1’) Spiracles of laterotergites VIII anterior to an imaginary transversal line through the posterior margin of gonocoxites VIII and placed close to the lateral angle of gonocoxites VIII ( Figs 43, 60: s, la8, gcVIII) .................... 5

4’ Spiracles of laterotergites VIII on or posterior to an imaginary transversal line through the posterior margin of gonocoxites VIII, and placed posterior to the lateral angle of gonocoxites VIII ( Figs 17, 35: s, la8, gcVIII); if the spiracles are slightly anterior to the imaginary line, then each spiracle is placed away from the lateral angle of gonocoxites VIII ( Fig. 25: s, la8, gcVIII) ........................... 6

5(4) Posterior margin of urosternite VII uniformly concave; gonocoxites VIII subquadrangular ( Fig. 43: VII, gcVIII).... ..................... L. graziae Hildebrand & Becker, 1982 ( Fig. 4)

5’ Posterior margin of urosternite VII subrectilinear over gonocoxites VIII; gonocoxites VIII subtriangular ( Fig. 60: VII)...................................................................................... L. acuminatus Kochenborger & Garbelotto sp. nov. ( Fig. 6)

6(4’) Posterior margin of urosternite VII uniformly concave ( Fig. 17: VII)...................... L. clypeatus ( Stål, 1862) ( Fig. 1)

6’ Posterior margin of urosternite VII subrectilinear medially ( Figs 25, 35: VII) .............................................................. 7

7(6’) Posterior margin of urosternite VII sinuous; gonocoxites VIII subrectangular ( Fig. 25: VII, gcVIII)............................ ................................ L. tenebricornis ( Ruckes, 1957) ( Fig. 2)

7’ Posterior margin of urosternite VII concave; gonocoxites VIII subtriangular ( Fig. 35: VII, gcVIII) .............................. ....................................... L. marginellus ( Stål, 1872) ( Fig. 3)