Malleusocoris minimus, Dellapé & Melo, 2023

Dellape, Pablo M. & Melo, Maria C., 2023, Malleusocoris, a new South American genus of Myodochini (Hemiptera, Rhyparochromidae) with modified antennae, along with some new synonymies and new combinations for misplaced taxa, Evolutionary Systematics 7 (1), pp. 117-122 : 117

Malleusocoris minimus sp. nov.

Figs 1 , 2-5

World catalog Lygaeoidea Species File link.

http://lsid.speciesfile.org/urn:lsid:Lygaeoidea.speciesfile.org:TaxonName:519163.

Type material.

Holotype ♂ (Fig. 1 ), Brazil, Mato Grosso / State Pantanal / 25 km. S of Poconé // Pousada form / SAO Cristovao / 29.8.2000 lgt J. Růžička // MLP / HE-10661 (MLP); paratypes 1 ♂ 2 ♀♀, same data as for holotype // MLP / HE-10662-10664 (MLP); 1 ♂ 5 ♀♀, same data as for holotype (NMPC); 1 ♀, 29.8.2000 lgt J. Růžička / Pousada form / SAO Cristovao (NMPC); 1 ♂, Brazil, Mato Grosso state, / Pantanal, 20 km. S of Poconé, / Pousada [farm] POUSO ALEGRE, / 30.viii.2000, Jan Růžička leg., B9 // ca. 100 m a.s.l., on light at / evening and night (20.00-23.00 of / local time-GMT/UTC +04.00), / light bulbs near the farm, end of / dry season (NMPC); 1 ♂, Argentina - Misiones / PN Iguazú / X-1980 T. Luz / D.J. Carpintero // MLP / HE-10665 (MLP).

Description.

Holotype male (Fig. 1 ). Total length 2.84. Head length 0.48, head width 0.58, interocular space 0.32, interocellar space 0.18; antennal segments length: scape 0.22, pedicel 0.32, basiflagellomere 0.20, distiflagellomere 0.50, scape width 0.08, distiflagellomere width 0.12. Anterior pronotal lobe length 0.32, width 0.60, posterior pronotal lobe length 0.24, width 0.92.

Head brown, with abundant short, whitish, decumbent setae. Antenniferous tubercles subparallel. Antennae: Scape surpassing apex of head by about half its length; pedicel and basiflagellomere widened distally; scape, pedicel and basiflagellomere light brown, distiflagellomere fusiform and enlarged; much darker and slightly paler apically; with abundant short whitish decumbent setae. Labium attaining mesosternum, segment I extending to half the length of eyes, remote from prosternum. Thorax. Pronotum with a faint median carina, more evident on transverse impression. Anterior pronotal lobe brown, posterior lobe paler with five longitudinal darker stripes, median macula reaching transverse impression; with abundant short whitish decumbent setae. Scutellum with a median carina on posterior half; coarsely punctate; brown with apex whitish; with same setae as on pronotum. Hemelytra irregularly pale brown, with paler margins interrupted by a pale brown spot at level of apex of claval commissure, apex of corium pale brown; with whitish setae on punctures, shorter than those of head, pronotum and scutellum. Legs light brown, with short whitish setae. Forefemur with a few minute spines in inner row. Abdomen. Male genitalia: Pygophore (Figs 2 , 3 ) broadly rounded in dorsal view, aperture quadrangular anterior to the sub-quadrangular inner projections; declivent posteriorly in lateral view. Parameres (Figs 4 , 5 ) with long and curved blade. Aedeagus weakly sclerotized, conjunctiva and vesica unspined, ejaculatory reservoir well developed, wings well projected laterally.

Paratypes similar to holotype.

Paratypes’ measurements

(min-max, mean). Males (n = 3): Total length 2.76-2.84, 2.80. Head length 0.46-0.50, 0.49, head width 0.56-0.60, 0.58, interocular width 0.30-0.32, 0.31, interocellar width 0.18-0.20, 0.19. Antennal segments length: scape 0.20-0.22, 0.21, pedicel 0.30-0.34, 0.32, basiflagellomere 0.18-0.20, 0.19, distiflagellomere 0.42-0.48, 0.46; scape width 0.06-0.08, 0.07, distiflagellomere width 0.12. Anterior pronotal lobe length 0.30-0.34, 0.31, width 0.60-0.66, 0.63; posterior pronotal lobe length, 0.26-0.28, 0.27; width 0.90-0.96, 0.93.

Females (n = 5): Total length 2.92-3.32, 3.11. Head length 0.48-0.56, 0.54, head width 0.62-0.64, 0.64, interocular width 0.34-0.36, 0.34, interocellar width 0.20-0.24, 0.21. Antennal segments length: scape 0.22-0.26, 0.24, pedicel 0.32-0.38, 0.34, basiflagellomere 0.18-0.20, 0.19, distiflagellomere 0.48-0.50, 0.49; scape width 0.08, distiflagellomere width 0.12-0.14, 0.13. Anterior pronotal lobe length 0.30-0.38, 0.34, width 0.66-0.72, 0.69; posterior pronotal lobe length, 0.28-0.30, 0.29; width 1.00-1.08, 1.03.

Etymology.

The specific epithet minimus is an adjective and refers to the small size of this new species.

Distribution.

Brazil, Mato Grosso, Pantanal; and Argentina, Misiones, PN Iguazú.

Figures

Figure 1. Malleusocoris minimus gen. nov., sp. nov. Habitus of male holotype. Scale bar: 1 mm.

Figures 2 - 5. Malleusocoris minimus sp. nov. Male genitalia, of male holotype. 2. Pygophore, dorsal view; 3. Pygophore, lateral view; 4. Right paramere, outer view; 5. Right paramere, inner view. Scale bars: 0.25 mm.