Orbellis flavescens Zámbó & Kondorosy, 2023

Zámbó, András, Kovács, Szilvia & Kondorosy, Előd, 2023, Revision of the genus Orbellis Distant, 1913 (Heteroptera: Rhyparochromidae), Zootaxa 5389 (2), pp. 193-212 : 204-205

Orbellis flavescens Zámbó & Kondorosy , sp. nov.

( Figs. 8 , 20 , 28 )

Type specimens examined. HOLOTYPE: Madagascar b. occ. / Mahajamba River / Antsiatsiaka VIII. / P. Švacha lgt. (♂, NMPC) // HOLOTYPUS.Type locality. Northwestern Madagascar, near Mahajamba River, around Antsiatsiaka, S16°07’ E47°20’ (P. Švacha, verbal communication) .

PARATYPES: Madagascar / Diego-Suarez / C. H. Alluaud 1893 [green label] (1♂, 1♀, MNHN) ; Madagascar bor. / Port Bergé env. / bridge across Sofia river / at light / 24. xi. 1996, P. Švacha lgt. // ex ethanol (1♂, NMPC) ; Madagascar NE 2011 / Ankarafantsika N. P. / S 16°18’43.7” E 46°48’59.4” / 23.ii.; 100m; at light close to small lake / P. Baňař lgt. (1♂, MMBC) ; NW Madagascar, 23–26. i. 2015 / Ankarafantsika N. P., 71m / near Ampinjoroa village / circuit “Tour du lac” / S16°18’13.0” E46°48’49.1” / M. Trýzna leg. (2♂♂, MMBC) ; West Madagascar / nr. Kirindi N.P., Andranomena / Spec. Res. 27m; (Andranovory nampela) / S 20°08’52” E 44°30’52” / 1–4. ii. 2013; M. Trýzna lgt. (1♂, MMBC) ; Madagascar Ouest / S-P. Antsalova / Antsingy Rés. nat. 9 / A. Peyrieras, I-1975 [blue label] (1♂, MNHN) ; Madagascar: Tulear / Bereboka 60km / NE Morondava / J. S. Nayes, M. C. Day / B. M. 1983-201 (1♂, BMNH) .

Description.

Colour: Head brown; clypeus paler; distiflagellum fuscous except sometimes cream coloured base; scape, at least proximal three-fourth of pedicel, basal and apical one-third of basiflagellum and labium yellow. Thorax brown; meso- and metasternum fuscous; scutellum and sometimes posterior lobe of pronotum brownish yellow; margins of pronotum, hemelytron with membrane and legs yellow. Abdomen brown.

Structure: Labium reaching at least posterior margin of metacoxae, sometimes longer but not over middle of abdominal sternite III. Lateral margin of pronotum from slightly convex to straight. Metafemora hardly thicker than mesofemora. Metafemora of males bearing stiff setae in anteroventral row and (partially tooth-like) strong tubercles in a posteroventral row (transitional between Figs. 24 and 25 ). Tibiae of both sexes straight. Abdominal venter impunctate.

Male genitalia: Pygophore: Similar to pygophore of O. polhemi . Ratio of sinuses as in O. calcaratus Zámbó & Kondorosy , sp. nov.; posterior aperture two-third as wide as entire width of pygophore. Paramere ( Fig. 20 ): Similar to paramere of O. calcaratus but bifid inner projection very short and acute with ventral apex very narrow, outer outline very widely rounded, not narrowed close to base. Shank relatively short and thick.

Measurements (9 males and 1 female, holotype in parentheses): Total body length: 4.80–5.70 (5.70); head: length 0.67–0.80 (0.80), width 0.85–1.05 (1.05), interocular space 0.42–0.55 (0.55); length of antennomeres: I 0.56–0.78 (0.78), II 0.80–1.23 (1.23), III 0.84–1.00 (1.00), IV 0.84–0.95 (0.95); length of labiomeres: I 0.75–0.90 (0.90), II 0.97–1.17 (1.17), III 0.70–0.84 (0.84), IV 0.45–0.54 (0.54); pronotum: length 0.96–1.85 (1.85), width 0.90–1.10 (1.10); scutellum: length 0.84–1.00 (1.00), width 0.88–1.05 (1.05).

Diagnosis. Orbellis flavescens Zámbó & Kondorosy , sp. nov. is similar in size to most congeneric species but the coloration is much paler. The palest specimens of the other species have at least more dark spots on the corium while the darkest O. flavescens specimens have at most an inconspicuous darker spot at branching of veins R and M.

Etymology. The Latin name is an adjective and refers to the pale colour of the species.

Distribution. Orbellis flavescens Zámbó & Kondorosy , sp. nov. is distributed along the western shore of Madagascar from north to the midwestern part ( Fig. 28 ).

Figures

FIGURES 1–11. Dorsal views of Orbellis species: 1. O. typicus Distant, 1913 lectotype; 2. O. polhemi Slater & O’Donnell, 1999; 3. O. maculosus Slater & O’Donnell, 1999 holotype; 4. O. madagascariensis Slater & O’Donnell, 1999; 5. O. calcaratus Zámbó & Kondorosy, sp. nov. holotype; 6. O. dentifemoralis Zámbó & Kondorosy, sp. nov. paratype; 7. O. odonnellae Zámbó & Kondorosy, sp. nov. holotype; 8. O. flavescens Zámbó & Kondorosy, sp. nov. holotype; 9. O. guilberti Zámbó & Kondorosy, sp. nov. holotype; 10. O. nigriapicalis Zámbó & Kondorosy, sp. nov. holotype; 11. O. longirostris Zámbó & Kondorosy, sp. nov. holotype. (Fig. 1 by E. Kondorosy, Fig. 3 E. Guilbert, Figs. 2, 4–11 A. Zámbó).

FIGURES 12–22. Male genitalia of Orbellis species: 12–15 pygophore (dorsal view); 16–22 left paramere (inner view): 16. O. madagascariensis; 12, 17. O. calcaratus; 13, 18. O. dentifemoralis; 14, 21. O. guilberti; 15, 22. O. nigriapicalis; 20. O. flavescens. (Figs. 12–15, 18 by Norbert Völgyi, 16–17, 19–22 Szilvia Kovács).

FIGURES 26–28. Distribution of Orbellis species in Madagascar: 26. previously described Orbellis species (solid symbol: literature data; empty symbol: new data; no new data available for O. maculosus); 27. O. calcaratus and O. dentifemoralis; 28. other new Orbellis species.

FIGURES 23–25. Male metafemur of Orbellis species: 23. Orbellis calcaratus; 24. O. dentifemoralis; 25. O. polhemi. (Figs. by Szilvia Kovács).