Stilbocoris galla Linnavuori, 1978

Kondorosy, Előd & Zámbó, András, 2021, The genus Stilbocoris in the Malagasy area (Hemiptera: Heteroptera: Rhyparochromidae), Zootaxa 5047 (4), pp. 416-430 : 422-423

Stilbocoris galla Linnavuori, 1978

urn:lsid:zoobank.org:act:B579CFD3-000F-4446-BE2C-013B7346AA62

( Fig. 2 )

Type locality. Ethiopia, Gembi near Agaro .

Examined material. MADAGASCAR: Madagascar Sambirano /Nosy-Be/forêt de Lokobe /XII-58/ Andria Robinson / Institut / Scientifique / Madagascar (1 ♀, MNHN) ; Ile Sainte-Marie /forêt de Kalalao /III-60 Andria R. /Insti- tut/ Scientifique / Madagascar [blue label] (1 ♀, MNHN) ; 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. (1 ♀, MNHN) ; 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) ; Maroantsetra / Ambodivoangy [correct: Ambodivoahangy]/ Institut / Scientifique / Madagascar (1 ♀, MNHN) ; Ivoloina [hw]/Inst. Scient. Madagascar/2-XI-49 Clément [hw] (1 ♀, MNHN) ; Mada- gascar Est /district de Maroantsetra /station forestiére de Farankaraina /route de Navana, km 16.5/vallée de Antoroka 100m /8/ 18-I-1964 / P. Viette / Institut / Scientifique / Museum Paris / Stilbocoris flavoscutellatus [hw]/ Hannothiaux det. (1 ♀, MNHN) ; Madagascar Ouest /S-P. Antsalova / Antsingy , Rés nat. 9/ A. Peyrieras, I-1975 / Museum Paris [blue label] (1 ♀, MNHN) ; Andobo 190m /forêt Antsingy /dct. Antsalova /II-57. P. Griv. / Museum Paris [blue label] (1 ♀, MNHN) ; SW Madagascar 2013/ Zombitse N. P., Bejaboa / S22°53′26″ E44°40′02″ / 816m, 28. i. M. Trýzna leg. (1 ♀, MMBC) . ETHIOPIA: Ethiopie / G. de Rougemont / Chora ( Ilubabor )/1600M. VI-1973 / Museum Paris [blue label] (1 ♀, MNHN) . KENYA: Kenya, Cherangani / Hills , Kapolet forest / 1880m, 19. 1. 1965 / A. Holm, nr 81/NHRS- GULI/000006437 (1 ♀, NHRS) ; Kenya, Cherangani / Hills , Kapolet forest / 1900m, 20. 1. 1965 / A. Holm, nr 81/ NHRS-GULI/000006433 (1 ♀, NHRS) ; Kenya, Cherangani / Hills , Kapolet forest / 1900m, 20. 1. 1965 / A. Holm, nr 81/NHRS-GULI/000006435 (1 ♀, NHRS) ; Kenya, Cherangani / Hills , Kapolet forest / 1900m, 20. 1. 1965 / A. Holm, nr 81/NHRS-GULI/000006436 (1 ♂, NHRS) ; Kenya, Cherangani / Hills , Kapolet forest / 1900m, 20. 1. 1965 / A. Holm, nr 81/NHRS-GULI/000006434 (1 ♂, NHRS) ; Afr. Angl. Or. (Wa-Kikuyu)/ Wambogo / Alluaud et Jeannel / Janv. 1912- 1750m — St. 32/ Mus. Zool. Helsinki / Loan No. / Hem. 2015-51 (1 ♂, MZHF) . TANZANIA: Tanzania: Tanga. Muheza Dist. / Kwangumi For. Res. ; 28.-31. x./1995; S4°57′ E38°44′; 170-220m / Canopy Light-trapping Project / S. McKamey et al lgt. (6 ♀♀, MMBC) ; Tanzania [pr]/ Usambara Mts. [hw]/ light trap / No. 54/ Hung. Sci. Africa / Exp. “Teleki”/14.01 [hw] 1988/leg. A. Vojnits (1 ♀, HNHM) ; Col. Mus. Congo /N. Lac Kivu: Rwankwi /III- V-1951 [hw]/ J. V. Leory (1 ♂, RMCA) .

Redescription. Colour. Body fuscous (sometimes pedicel, basiflagellum or Y-shaped carina of scutellum pal- er); scape, distiflagellum, pronotum (except yellowish humeral angles; sometimes posterior lobe of pronotum paler than anterior one) and legs yellowish brown; hemelytra (except narrow fuscous apical margin of corium) and distiflagellum (except narrowly fuscous base) pale yellow; scape, labium (except fuscous apex of labiomere IV) and legs vivid yellow; membrane translucent.

Integument. Body shiny, except dull head and abdomen. Punctation of dorsal surface of head very dense and fine (punctures almost confluent and much smaller than punctures of calli), difficult to notice due to dense pubescence of head, punctures of head ventrally even smaller than dorsally. Anterior lobe of pronotum densely and rather coarsely punctate (punctures mostly as close to each other as their diameter), callar area sparsely punctate with very fine punctures, posterior lobe punctate with coarse punctures (density variable on different specimens and parts, distance of punctures often more than three times of their diameter, in other cases almost touching each other). Scutellum between arms of Y-shaped elevation with dense punctures slightly finer than on posterior half of pronotum, laterad of it with dense and very coarse punctures. Punctures of clavus and corium similar to punctures of pronotum, very fine in row along scutellum; along impunctate exocorium and along both sides of vein Cu very dense, nearly touching each other. Sternum with dense strong punctures, on proepisternum sometimes sparser. Abdominal venter extremely finely and densely punctate.

Vestiture. Head densely covered with fine decumbent pubescence. Antenna with dense semidecumbent short pubescence and sparse erect setae much longer than diameter of pedicel. Pronotum with numerous fine erect setae not longer than diameter of pedicel; scutellum with some hardly visible tiny erect setae; hemelytra glabrous. Profemora armed with 2 (exceptionally with 3) stiff erect setae on apical one-fourth and with about 5–7 fine long erect setae in a row anteroventrally, meso- and metafemora armed with 2 (sometimes 1 or 3) stiff erect setae anteroventrally. Protibiae armed with strong stiff erect setae in a ventral row, entire surface of legs densely covered with fine semidecumbent setae. Abdominal venter with very dense short decumbent pubescence, with large pruinose sublateral spot on sterna V and VI, almost reaching anterior and posterior margins of segments.

Structure. Labium almost reaching mesocoxae (sometimes reaching it well), labiomere I reaching middle of eyes or almost reaching prosternum, labiomere III of males hardly thickened. Callar area of pronotum slightly elevated, more or less divided in middle; transverse impression from well-impressed to weak. Lateral margin of pronotum hardly laminate, mostly about half as broad as width of pedicel at its base, widening anteriad and narrowing posteriad but continuing around humeral angles and reaching base of scutellum; slightly concave at level of transverse impression; anterior and especially posterior margin strongly concave. Scutellum with strongly elevated Y-shaped elevation, anterior arms blunt but posterior arm sharp. Abdominal segment III with rather strong hump medially.

Male genitalia. Pygophore rather similar to pygophore of S. scudderi sp. nov. ( Fig. 7–8 ). Subglobose, posterior aperture mushroom-shaped and about as wide as long, ventral sinus of posterior aperture about 1.4 times wider than anterior part and both parts separated by very shallow and wide sharp tooth-like projections, caudal margin of ventral sinus with broad membrane in total width. Cup-like sclerite huge, strongly elongate dorsally, significantly emerging above aperture (on both side of it parameres also emergent). Posterior part of pygophore sparsely covered with fine semidecumbent and semierect setae as well. Paramere with blade strongly curving inwards, axis of it almost perpendicular to shank, very wide, widest part about 0.5 times wider than entire length, crescent-shaped external margin evenly arcuate, internally also arcuately widened and terminating in very narrow posteriorly curved acute apex, shank slightly shorter than blade, in middle with finger-like projection orientated toward apex of blade. Figure of paramere see in Linnavouri (1978: fig. 61g, p. 79).

Total length of body: 4.36–6.36.

Distribution. The only published record of S. galla concerned the type specimens from Ethiopia. Therefore, it is a new species for Madagascar ( Fig. 10 ), Kenya and Tanzania.

Remark. Males of this species are rare, among 10 specimens from Madagascar not even one has been found, and only very few among specimens from continental Africa. The species might perhaps be partially parthenogenetic.

Figures

FIGURE 10. Distribution of Stilbocoris species in Madagascar.

FIGURES 1–4. Dorsal views of Stilbocoris species: 1. Stilbocoris solivagus Bergroth, 1893, 2. Stilbocoris galla Linnavuori, 1978, 3. Stilbocoris triangularis Linnavuori (Photos: authors), 1978 4. Stilbocoris scudderi sp. nov. paratype, dorsal view (Photo: Csaba Pintér).

FIGURES 5–9. Male genitalia of Stilbocoris species: 5–6: S. slateri sp. nov.: 5: pygophore (dorsal view), 6: left paramere; 7–9: S. scudderi sp. nov.: 7–8: pygophore (dorsal and caudal views), 9: left paramere. (Drawings: Szilvia Kovács).