Orbellis calcaratus Zambo & Kondorosy 2023, sp. nov.
Creators: name: Zámbó, András
name: Kovács, Szilvia
name: Kondorosy, Előd
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Rhyparochromidae
Orbellis
Orbellis calcaratus

description: Orbellis calcaratus Zámbó & Kondorosy, sp. nov.
(Figs. 5, 12, 17, 23, 27)
Type specimens examined. HOLOTYPE: Madagascar 2011/ Ambohitantely Spec. Res. / S18°11’51” E47°17’03” / 1530m; at light, 24–29. xi. / M. Trýzna lgt. (♂, MMBC) // HOLOTYPUS. Type locality. Central Madagascar, Analamanga Region, Ambohitantely Special Reserve.
PARATYPES: Madagascar Nord / Rég. Tsaranana / N. Mangidrano / Analabana / IV-1964 / 1640m. P. Soga (1♂, MNHN); Madagascar 1049m / Antsiranana, Antsahampano / Montagne d’ Ambre / Malais Trap [sic], 15.– 19.xii.2004 / 12.53°S 49.17°E, D. C. Lees / BMNH {E} 2004-46 (1♂, BMNH); Madagascar-N / Montagne d’ Ambre N. P. / 26–30. x. 2010, surr. camp. / sweeping; P. Baňař lgt. (4♂♂, MMBC); Madagascar bor. Montagne / de Ambre Nat. Park Joffrey / vill. env. / 30.11.1996, P Švacha lgt. (2♂♂); ASB/ light Madagascar / Andasibe N. P.; 12.iv.2011 / 943m; forest edge, at light / S18°56’09.5” E48°25’08.2” / P. Baňař + local collectors lgt. (1♂, MMBC); MadagascarCE 2010 / border of Andasibe N. P.; 916m / “ Parc de Orchidées ”; 3– 6. xi. / S18°55’59.9” E048°24’46.5” / at light; P. Baňař & loc. coll. lgt. (2♂♂, MMBC); CE Madagascar 2014 / Toamasina pr.: Andasibe- / Mantadia N. P. 961m / Analamazaotra forest / 18°56.324’S 48°25.396’E / 961m; 9.– 12.ii., M. Trýzna lgt. (5♂♂, MMBC); Madagascar-CE; 1170m / Ranomafana N. P.; 17.xi.2010 / Amboditanimena env.; at light / S21°12’14.9” E047°22’05.2” / secondary forest; P. Baňař lgt. (1♂, MMBC); Madagascar 2011 / Ambohitantely Spec. Res. / S18°11’51” E47°17’03” / 1530m; at light, 24.–29. xi. / M. Trýzna lgt. (3♂♂, EHIA); Madagascar Centre/ Antananarivo: Ambodrona / 3.- 5.1.1995 / J. Janák lgt. / 1250–1350m / jardins / tamisages (1♂, MMBC); Madagascar: Fianarantsoa / 2,5km SE Ranomena / 21°29’36” S 47°24’11” E / 5.- 10.2.2000, J. Kabelák lgt. (1♂, NMPC); E Madagascar 17.- 23.12.1998 / 30km SEE of Bertroka, 1400–1670m / Vohitrosa forest, 2km / E of ∆ 1825m, P. Bullirsch lgt. / Ex. collection / Z. Jindra, Prague (1♂, ZJPC); Madagascar Est / Ambatombe pr. / Andilamena, 17.1.1995 / G. Dunay + J. Janák lgt. / 900m / forét dégradée / prairie second., lux. (1♂, MMBC).
Description.
Colour: Head fuscous—also apical 1/5 of pedicel, basal ¾ of basiflagellum, entire distiflagellum and apex of labiomere IV; scape, proximal 4/5 of pedicel, base of basiflagellum and labium yellow; apical part of basiflagellum cream coloured. Thorax brown; medial spot of anterior margin of pronotum and often a wavy line near posterior margin of pronotum broadening submedially to large oval spots fuscous; sublateral keels of scutellum, membrane, femora except sometimes brown metafemora, tibiae and tarsi (apical part of them often darkened) yellow; except brown middle part pale yellowish; anterior and lateral margins of pronotum, spots of posterior margin of pronotum and hemelytra (except apex and a sometimes obscure oblique brown spot of corium orientated from two-thirds length of costal margin to apex of scutellum connected with narrow stripe along inner margin of vein Cu) cream coloured. Colour of hemelytra very variable from almost unicolorous yellow to mostly brown, on some specimens spots conspicuous, on others obscure; similarly, femora can be dark brown or yellow. Abdomen pale brown.
Structure: Subshiny species. Labium mostly reaching metacoxae but sometimes attaining sternite III. Pronotal collar relatively wide, slightly V-shaped, arched and at widest 3 times as wide as base of pedicel. Lateral margin of pronotum from straight to slightly convex. Membrane mostly reaching apex of abdomen. Metafemora at least 1.30 times thicker than mesofemora. Meso-and metafemora bearing strong stiff setae and strong tubercles in two rows ventrally. On male metafemora (Fig. 23) 1–3 spur-like elongate teeth present next to stiff setae, one of them rather large and curved outwards. Metatibiae of males in basal half noticeably curved. Abdominal venter nearly impunctate, wrinkles visible on distal part of sternites V–VII only.
Male genitalia: Pygophore (Fig. 12): Posterior margin with a long (at least as long as 1/3 length of pygophore, 5 times as long as wide), evenly narrow projection, being apically excavated and curved ventrad. Pygophore densely covered with short semierect and decumbent setae. Dorsal sinus small, about half as wide as ventral sinus, about one-third as long as ventral sinus; posterior aperture three-fourth width of entire width of pygophore.
Paramere (Fig. 17): Very broad, outer margin almost semicircular, inner projection short, apex bifid, acutely rounded, inner part of apex small. Keel starting from stem straight, surpassing half the length of paramere, terminating distad of inner projection. Blade terminating in a relatively long and narrow projection (in lateral view basally wide, strongly tapering to narrow apex curved ventrad).
Measurements (23 males —females excluded because of the high similarity to the next two new species, holotype in parentheses): Total body length: 5.40–6.57 (5.48); head: length 0.62–0.66 (0.65), width 0.90–1.00 (0.96), interocular space 0.51–0.56 (0.52); length of antennomeres: I 0.64–0.71 (0.64), II 1.04–1.18 (1.04), III 0.84–1.18 (0.84), IV 0.73–0.81 (0.88); length of labiomeres: I 0.76–0.86 (0.78), II 0.98–1.15 (1.05), III 0.78–0.86 (0.75), IV 0.62–0.63 (0.52); pronotum: length 0.98–1.10 (1.00), width 1.75–1.93 (1.84); scutellum: length 0.92–1.20 (0.92), width 1.04–1.15 (1.04).
Diagnosis. The male genitalia of Orbellis calcaratus Zámbó & Kondorosy, sp. nov. is similar to Orbellis madagascariensis because the pygophore of both species has an elongate finger-like projection (however, the dorsal sinus of posterior pygophore aperture is much larger, about 0.8 times as long and 0.7 times as wide as ventral sinus); furthermore, the two species agree with straight lateral pronotal margin (in some species the pronotal margin of O. calcaratus slightly convex) but the body size is very different (not more than 6.60 mm vs. at least 9.00 mm). The length of the labium also differs between the two species (the labium of O. calcaratus does not reach over the posterior margin of abdominal sternite III, whereas the labium of O. madagascariensis reaches at least the posterior margin of abdominal sternite IV). The other previously described Orbellis species (O. maculosus, O. polhemi and O. typicus) are of similar size as O. calcaratus but except O. typicus none of them has a dark median area on the scutellum, and the males do not have spur-like tubercles on the metafemora or a finger-like pygophore projection (male of O. maculosus unknown). O. maculosus and O. polhemi have slightly concave lateral pronotal margins (at least at level of transverse impression) while that of O. typicus is almost straight. Concerning coloration, O. maculosus is very different while O. polhemi is rather similar to O. calcaratus; the most characteristic difference is that the scutellum of O. polhemi has an apical blackish spot while O. calcaratus has a dark midline not an apical spot; furthermore, the males have narrower metafemur with much less projections (Fig. 25) and lack any projection on the pygophore. The most similar species in coloration is O. typicus but its type lacks the long projection on the pygophore and coloration of the hemelytra is mostly darker and more contrasting in O. typicus.
Etymology. The Latin name is an adjective and refers to metafemora of males armed with a large curved calcarlike tooth ventrally.
Distribution. Orbellis calcaratus Zámbó & Kondorosy, sp. nov. is distributed in the eastern part of Madagascar (Fig. 27); no localities are known from the western provinces until now.
description: Published as part of Zámbó, András, Kovács, Szilvia & Kondorosy, Előd, 2023, Revision of the genus Orbellis Distant, 1913 (Heteroptera: Rhyparochromidae), pp. 193-212 in Zootaxa 5389 (2) on pages 200-201, DOI: 10.11646/zootaxa.5389.2.3, http://zenodo.org/record/10406905