Orbellis dentifemoralis 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 : 201-202

Orbellis dentifemoralis Zámbó & Kondorosy , sp. nov.

( Figs. 6 , 13, 18 , 24 , 27 )

Type specimens examined. HOLOTYPE: SW Madagascar 2013/ Isalo N. P., Analalava for. / Antanambao vill. env., 720m / S22°35’ E45°07’ / 16.–19. i. M. Trýzna leg. (♂, MMBC) // HOLOTYPUS. Type locality. Madagascar, Ihorombe Region , Isalo National Park .

PARATYPES: SW Madagascar 2013 / Zombitse N. P., (main entr.) / Ambakintany forest , 816m / S22°53’11” E44°41’31” / 24.–27. i. M.Trýzna leg. (12♂♂, MMBC); SW Madagascar 2013 /Zombitse N.P.; Bejaboa / S22°53’26” E44°40’02” / 816m, 28.i. M. Trýzna leg. (1♂, MMBC); SW Madagascar Toliara pr. / Zombitse-Vohibasia N. P. / Zombitse forest , 824m, main / entr. 22°53.471’S 44°41.489’E / 22.–25. i. 2014 / M. Trýzna leg. (1 ♂, MMBC) .

Description.

In colour and structural characters very similar to O. calcaratus Zámbó &Kondorosy , sp. nov.; females not identifiable based on morphological features (see in diagnosis). Metafemora of males ( Fig. 24 ) thick, bearing besides stiff setae, several sharp teeth and strong tubercles on entire ventral surface, partly in rows.

Pygophore ( Fig. 13 ): Posterior margin with a rather short and thick projection, about two times as long as wide, oriented caudo-ventrad, more or less excavated apically. Dorsal sinus relatively small, one-third as long and 0.6 times as broad as ventral sinus; posterior aperture three-fourth width of entire width of pygophore.

Paramere ( Fig. 18 ): Very broad, outer margin broadly and obtusely subtriangular, inner projection short with bifid apex, widely rounded, situated much more basally than widest part of outer margin, apex large. Blade terminating in long narrow projection (gradually tapering to apex in lateral view, tip curved strongly ventrad). Keel starting from stem nearly straight, not reaching widest part of outer projection, reaching about half length of paramere.

Variations: Sometimes entire posterior pronotal lobe except fuscous wavy subbasal line and cream coloured posterior margin paler brown, and/or dark area of scutellum visibly smaller.

Measurements (15 males —females not separable with certainty, holotype in parentheses): Total body length: 4.96–6.68 (6.20); head: length 0.60–0.82 (0.76), width 0.92–1.00 (1.00), interocular space 0.50–0.71 (0.60); length of antennomeres: I 0.64–0.80 (0.76),, II 1.12–1.24 (1.20),, III 0.88–1.06 (1.00), IV 0.68–1.13 (0.80); length of labiomeres: I 0.70–0.90 (0.87), II 0.87–1.16 (1.11), III 0.63–0.88 (0.81), IV 0.41–0.55 (0.51); pronotum: length 0.96–1.14 (1.12), width 1.60–2.00 (1.96); scutellum: length 0.92–1.08 (1.00), width 0.92–1.06 (1.04).

Diagnosis. Orbellis dentifemoralis Zámbó & Kondorosy , sp. nov. seems to be very similar to O. calcaratus Zámbó & Kondorosy , sp. nov. Both species have straight or slightly convex lateral pronotal margins; the abdominal venter is almost smooth with some hardly visible scattered minute punctures; the metafemora are visibly thicker than the mesofemora, the former armed with two rows of strong stiff erect setae, and with large tubercles between the rows; and male genital capsule with an elongate distal projection. Despite the many similarities, males of the two species can be easily distinguished from each other. The metafemora of the males of O. calcaratus have 1–3 (mostly 2) spur-like thick teeth ( Fig. 23 ), while O. dentifemoralis lacks these large teeth ( Fig. 24 ). The elongate projection of the pygophore of O. calcaratus is relatively long and narrow (at least 5 times longer than thick), while the projection of O. dentifemoralis is very thick and rather short (hardly longer than thick). All previously described species can be separated from O. dentifemoralis on the same way as O. calcaratus . The male genitalia of the much larger O. madagascariensis is somewhat similar because the pygophores of both species have relatively short finger-like projections, but O. madagascariensis has a large dorsal sinus on the posterior aperture (about as long as ventral sinus) while the dorsal sinus of the posterior aperture is about one-third as long as ventral sinus in O. dentifemoralis . However, the other differences are relative or not constant enough (dark median of scutellum widening anteriad continuously while on O. calcaratus in posterior half evenly narrow, not wider than scape); lateral margin of the pronotum of O. calcaratus straighter, of O. dentifemoralis more convex; venter of abdomen of O. dentifemoralis mostly more strongly punctate and wrinkled), therefore the females were not selected as paratypes.

Etymology. The Latin name is an adjective, referring to metafemora of males armed with several sharp teeth ventrally.

Distribution. Orbellis dentifemoralis Zámbó & Kondorosy , sp. nov. is known from the southwestern part of Madagascar only ( Fig. 27 ); no localities are known from the other provinces until now; therefore, it seems to be no overlapping with the distribution of O. calcaratus .

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