Menenotus diminutus Walker, 1871

Silveira, Diego D., Costa, Wanessa da S. & Barcellos, Aline, 2021, Taxonomy, morphology, and new distribution data of Menenotus (Coreidae, Coreinae, Spartocerini), Iheringia, Série Zoologia (e 2021029) 111, pp. 1-9 : 7-8

Menenotus diminutus Walker, 1871

( Figs 3, 4 , 9–12 , 15, 16 , 19–21 , 24 )

Menenotus diminutus WALKER, 1871:7 . LETHIERRY & SEVERIN, 1894:54; DISTANT, 1901:430; PACKAUSKAS, 2010:192; COSTA et al., 2020: fig. 22, 23; COREOIDEA SF TEAM, 2020.

Type material (examined by photo): Holotype – Menenotus diminutus ♂ ( Fig. 24 ). a) Holotype, b) Type, c) Menenotus diminutus – white label, d) saunders 65´13 – white label, e) Braz – white label, f) Osuna des 1982 Menenotus diminutus Walker ♂ Holotype, g) BMNH(E) 651853.

Distribution: Brazil ( Fig. 21 ).

Head. Mandibular plates ventrally convergent.

Thorax. Pronotum with truncated postero-lateral angles, not forming a semicircle and with the posterior margin sub-rectilinear. Evaporative area black or yellow, with few setae; peritreme yellowish. Costal margin of hemelytra subrectilinear.

Abdomen. Connexiva with rounded and well-defined yellowish spots along the anterolateral margin of the segment. Pygophore at rest leaving visible an area equivalent to one third of its own length of the urotergite VII, in ventral view.

Genitalia. Male. Pygophore dark yellow, with irregular red spots laterally. Dorsal rim of pygophore subquadrangular. Posterior surface of the pygophore, in lateral view, markedly projected subapically. Cuplike sclerite projected more than twice its width in lateral view of the pygophore. Parameres slender, light yellow with the apical region of the head, dark brown; head long, almost half the total length, tapered, projected in a smooth curvature to the inner side and with ventral setae. Ventral sclerotization of the phallotheca with irregular shape. Basal plate triangular, densely sclerotized, except for the inferior portion of the transverse bridge, which is less sclerotized, about half its thickness; sclerotization of the central part of the ductifer shorter than half of length of the ligamentous processes. Processes of the conjunctiva with some points of sclerotization.

Measurements (mm), male and female, respectively. Total length: 19.9–23.1 and 23.3–24.6; width, on the posterior margin of the IV abdominal segment: 10–10.6 and 12.4–12.7. Head length: 1.5–1.8 and 1.9–2.2; width: 2.1–2.3 and 2.4–2.9. Interocular space: 1.1–1.5 and 1.3. Antennomeres length I: 3.5–4.0 and 3.9–4.2; II: 3.6–4.4 and 4.0–4.5; III: 3.1–3.9 and 3.6–3.7; IV: 2.9 and -. Pronotum length: 7.0–8.1 and 7.9–8.5; width: 9.5–11.5 and 10.5–11.4. Scutellum length: 2.4–2.7 and 2.9–3.4; width: 3.1–3.3 and 3.6–4.0.

Material examined. BRAZIL, Rio de Janeiro: Petrópolis, Independência , ♂, 13.III.1995, Ricardo ( FIOC 35304 ) ; São Paulo: Botucatu , ♂, 28.II.1986, Leac ( MZSP 5165 ) ; Paraná: Ortigueira , ♀, I.1946, Ernesto ( MHNCI) ; Santa Catarina: Gravatal , ♀, 16.I.1962, Silveira, P. A. ( MCNZ 02958 ) ; Criciúma , ♀, 21.X.2005, Miranda, A. ( UFRGS 1297 ) ; Rio Grande do Sul: Torres , ♂, 3.X.1985, Fleck, F. K. col. ( MCNZ 48837 ) ; ♀, 12.I.2005, L. Moura & I. Heydrich ( MCNZ 177360 ) ; Maquiné , ♂, 20.VII.2006, A. Barcellos ( MCNZ) .

Comments. Menenotus diminutus can be distinguished from M. lunatus by the posterior margin of the pronotum sub-rectilinear near the posterolateral angles; connexivum with a well-marked yellow spot; cuplike sclerite projected more than twice its width, in lateral view of the pygophore; and paramere slender, with a smooth curvature of the head.

Figures

Figs 1–4. Habitus of Menenotus lunatus (Laporte, 1832) (1, 2) and M. diminutus Walker, 1871 (3, 4). Red circles highlight posterolateral angles of pronotum. Scale bars: 5.0 mm.

Figs 5–12. Pygophore in dorsal view (5, 9), phallus in lateral view (6, 10) and right paramere in ventral (7, 11) and dorsal view (8, 12) of Menenotus lunatus (Laporte, 1832) (5–8) and M. diminutus Walker, 1871 (9–12). Subtitle: cls, cuplike sclerite; dp, dorsal processes of conjunctiva; pr, paramere; vp, ventral process of conjunctiva; X, anal tube. Scale bars: 0.5 mm.

Figs 13–16. Female genitalia Menenotus lunatus (Laporte, 1832) (13, 14) and M. diminutus Walker, 1871 (15, 16) in ventral view. Subtitle: gs, ginatrium strap; ltVIII, laterotergites VIII; ltIX, laterotergites IX; p, plica; pf, posterior fibula; stVII, urosternite VII; sph, spermatheca; vaIX, valvulae IX; vfVIII, valvifers VIII; vfIX, valvifers IX. Scale bars: 1.0 mm.

Figs 17–20. Valvulae and valvifer VIII in dorsal view (17, 19) and spermatheca in ventral view (18, 20) of Menenotus lunatus (Laporte, 1832) (17, 18) and M. diminutus Walker, 1871 (19, 20). Subtitle: af, anterior fibula; al, anterior leaflet; ap, apodeme; bb, bulb base; bu, bulb; dds, distal duct of the spermatheca; g, gonangulum; lp, lobular papillae; pds, proximal duct of the spermatheca; pep, proximal expansion of pump; prp, proximal rim of pump; s, setae; vaVIII, valvulae VIII; vfVIII, valvifers VIII. Scale bars: 1.0 mm.

Fig. 21. Distribution map of Menenotus Laporte, 1832 species with the biogeographic domains according to MORRONE (2013), based on literature and examined material.

Figs 22–24. Habitus of the type specimens of Menenotus lunatus (Laporte, 1832), female (MNHN) (22) described under the name Menenotus unicolor Westwood, 1842 male (courtesy of Oxford University Museum of Natural History, OUMNH), currently junior synonym of M. lunatus (23); Menenotus diminutus Walker, 1871 male (BMNH) (24). Scale bars: 5.0 mm.