Oukhypencha ophthalmica sumaterensis ( Stål, 1863 ) Magnien, 2023

Magnien, Philippe, 2023, New genera, species and subspecies of tessaratomine true bugs (Heteroptera: Tessaratomidae, Tessaratominae), Zootaxa 5375 (4), pp. 533-549 : 540-541

Oukhypencha ophthalmica sumaterensis ( Stål, 1863) ssp. nov.

( Figs. 5–6 , 14, 18, 21, 29)

Specimens studied. Holotype ♂, 30 XI 1980 Ketambe SE Aceh N Sumatra Indonesia Dr. Roesler leg. ( SMNK)— paratype ♀, same data.

Diagnosis. Medium sized Tessaratomina , characterized by the following set of characters: head very small, with eyes and ocellae relatively very large, antennae long, little more than half of habitus length; connexivum bicolourous; pygophore angular, posterior ductus of spermatheca of even width aft of striated dilation which is about 60 % larger.

Description. Habitus ( Figs. 5–6 ): body of common pentatomoid shape, general hue bronze brownish above, of a lighter brownish for underside, apical half of fourth antennomere, apex of scutellum and forepart of each connexivum segment yellowish;

Head. Triangular, mandibular plates surpassing the tylus, entirely punctated save for a small area around ocellae; antennae 4-segmented, long; eyes relatively very large, ocellae less so (ocular index 1.2–1.3, ocellar index 1.6–1.9).

Thorax. Pronotum sexangular, antero-lateral margins slightly concave, postero-lateral margins very slightly bisinuous, humeral angle rounded; callosities conspicuous, slightly marked. Scutellum triangular, shorter than wide, its apex lanceolate. Metasternum with an elevated plate between coxae, bearing a rounded lanceolate process surpassing fore coxae, somewhat curved upwards at apex; evaporatoria small, in accordance with the description given for the tribe in Kment & Vilimova (2010); legs flavescent, femora with a black ring at apex, length of apical teeth of posterior femora little more than half its diameter, tibiae furrowed outside, with a black line on on either side of furrow.

Abdomen. Abdominal margins straight; spiracles closer to margin than to middle of the sternites, trichobothria closer to middle, aft of transverse furrow.

Male genitalia. Eighth segment visible ventrally, representing a third of visible length of genital segments, pygophore (Fig. 14) simple, its posterior margin concave, with a small central V-notch, angularly connected to lateral margins, parameres ( Fig. 18 ) recurved, sensorial lobe marked by a brush of setae, their length about two thirds of paramere width, apophyse broadly rounded. Conjunctiva of the phallus ( Fig. 18 ) with three pairs of processes, as follow: distally, a pair of membranous processes, latero-dorsal, and two pairs of strongly sclerotized ventral processes, one central, bifid, its biggest arm free, hook-shaped, its smaller one only weekly sclerotized, free only at apex, the other latero-ventral, hook-shaped, very large.

Female genitalia ( Fig. 21 ). Ring sclerites existing; spermatheca of common type in Tessaratomini ; apical receptacle (distal bulb) spherical with a basal “neck”, intermediate part (pump apparatus) with two well developed flanges; spermathecal duct bipartite, anterior duct slender, posterior duct much larger, with an anterior striated dilation about 60 % wider than rest, rear part about two times longer, of even diameter on all its length.

Measurements (mm). Male (holotype)—length 19.8; width 10.7; antennal articles length (A1: 10, A2: 3.6, A3: 3.6, A4: 4.0)

Female—length 23,4; width 10.7; antennal articles length (A1: 1.0, A2: 3.5, A3: 3.7, A4: 4.1)

Etymology. The name of this subspecies refers to its geographical origin.

Distribution. Indonesia (Sumatra).

Discussion. This taxon is represented by only two specimens, collected together in Sumatra. It is to be noted that the male holotype is slightly teratologic, with a malformation of left outer part of the abdomen, including pygophore which is somewhat assymetric, its left side smaller than the other. It does not seem to have affected the genitalia, parameres and phallus being almost perfectly symmetrical.

As expressed here above, it was chosen to represent Stål’s species because of its female specimens being closest to Stål’s type. This can only be verified when males from Thailand will be available to compare to the holotype of this taxon.

The female paratype is very similar to O. ophthalmica s. str., but not identical. Their habitus are very close, but O. sumaterensis has anterior margins of pronotum somewhat concave, whereas O. ophthalmica has straight ones. Spermatheca are also similar, but O. sumaterensis has receptacle neck and anterior ductus shorter and striated dilation much bigger than O. ophthalmica . Added to the impossibility of comparing male features, it led to the decision of choosing a subspecies status for this taxon.

Figures

FIGURES 4–6: habitus.—4 Oukhypencha ophthalmica ophthalmica Stål ♀ (holotype); 5–6: Oukhypencha ophthalmica sumaterensis n. sp.—5: ♂ (holotype)—6: ♀ (paratype). Scale 10 mm

FIGURES 15–18: male genitalia, phallus and paramere—top: phallus (lateral view)—middle: ventral processus (ventral view, right side)—bottom: paramere (dorsal and lateral view, pilosity omitted in lateral view)—15 Hypencha sp. (same specimen as Fig. 10)—16: Oukhypencha clemenceae n. sp.—17: Oukhypencha florenceae n. sp.—18: Oukhypencha ophthalmica sumaterensis n. subsp. Abbreviations: a—apophysis, c—conjunctiva, d—membranous dorsal process, lv—latero-ventral processus, mv—membranous ventral process, ph—phallobase, sd—sclerified dorsal processus, sl—sensorial lobe, v—vesica, vp—ventral processus. All scales 1 mm.

FIGURES 19–23: Oukhypencha, female genitalia, evaporatoria.—19–22: female genitalia.—23: evaporatoria.—19, 23: Oukhypencha clemenceae n. sp.—20: Oukhypencha ophthalmica ophthalmica—21: Oukhypencha ophthalmica sumaterensis— 22: Oukhypencha stali. Abbreviations: ad—anterior duct, ev—evaporatoria field, ip—intermediate part, o—ostiole, pd—posterior duct, pw—posterior wall of vagina, r—receptacle, rs—ring sclerite, sd—striated dilation All scales 1 mm.