Zhengica, Rédei & Tsai, 2021

Rédei, Dávid & Tsai, Jing-Fu, 2021, Zhengica cornuta gen. nov., sp. nov., a new genus and species of Pentatomidae from East Asia (Hemiptera: Heteroptera), Zootaxa 5071 (2), pp. 271-282 : 272-273

Zhengica , gen. nov.

Diagnosis. Medium-sized pentatomids defined by the following combination of characters: integument with irregular punctation forming a mottled pattern; lateral margins of mandibular plates strongly reflexed; anterior angles of pronotum produced into a pair of large processes laterad of eyes; peritreme associated with ostiole of metathoracic scent gland strongly reduced, minute; membranal sections of M and Cu branching into several short stubs; abdominal ventrite VII greatly produced anteriad therefore mesal portions of ventrites III–VI shortened (ventrite VII subequal in length to mesal length of ventrites III–VI combined).

Description. Body of medium size, elongate oval, more strongly convex ventrally than dorsally ( Figs. 1–3 ). Integument and vestiture. Integument densely and coarsely punctured, pronotum and scutellum distinctly rugopunctate, punctures frequently confluent, forming extensive dark areas, together with impunctate areas resulting in a mottled pattern ( Fig. 1 ); body appearing glabrous dorsally, with fine, inconspicuous pilosity ventrally and on appendages.

Head and cephalic appendages. Head ( Figs. 4–6 ) broad, parabola-shaped, dorsal surface flat, anterior portion of clypeus and adjacent parts of mandibular plates slightly declivous, lateral margins of anteocular portion laminate, strongly reflexed (particularly in its posterior half) (cf. Fig. 5 ); apex of clypeus free; mandibular plates as long as clypeus, lateral margin irregularly undulate (asymmetrically between left and right sides), posteriorly abruptly, roundedly converging to anterior margin of eye, forming a small, rounded lobe immediately anteriad of eye; eye relatively small, globose; postocular portion strongly produced, situated in deep anterior emargination of pronotum; ocelli placed far posteriad of posterior margin of eye; antenniferous tubercle completely concealed by lateral margin of head in dorsal view, simple, unarmed; buccula low, gradually blending into ventral head surface posteriorly, with a distinct, angulate, rather sharp denticle slightly anteriad of insertion of labium. Antenna with five antennomeres (pedicel subdivided), scape short, extending to about apex of head, basi- and distipedicellites narrow, slightly compressed, basi- and distiflagellum slightly spindle-shaped, more distinctly compressed. Labium slightly surpassing base of ventrite VII, labiomere III longest.

Thorax. Pronotum ( Figs. 4–6 ) broad, anterior margin deeply emarginate around postocular portion of head, somewhat compressed, flattened anteriad of calli; anterior angles produced into a pair of large, anterolaterally directed processes laterad of eyes; lateral margins compressed, gradually diverging and irregularly denticulate to about middle of calli, then expanded laterad, forming a pair of broad, obtuse, dorsoventrally flattened lobes only weakly surpassing base of costal margin of forewing; posterolateral angles broadly rounded, indistinct; posterior margin weakly concave. Scutellum elongate, slightly shorter than head and pronotum combined, distinctly longer than basal width, frenal portion about twice as long as postfrenal portion, with a pair of weak impressions at anterolateral angles, postfrenal portion narrowly tongue-shaped. Thoracic pleuron and sternum ( Figs. 7–9 ). Preepisternum very weakly produced anteriad; prosternum insignificantly impressed; mesosternum with a low, obtuse carina along meson, terminating between mesothoracic acetabula in a posteriorly directed process interlocking with anterior process of metasternum; metasternum rather flat; metathoracic scent gland ostiole small, oval, associated with very short, elongate oval peritreme ( Figs. 7–8 ); evaporatorium extensive on meso- and metapleura ( Fig. 7 ). Fore wings. Corium much surpassing apex of scutellum in rest, distal (membranal) margin broadly rounded at posterior extremity (close to apex of scutellum in rest), nearly straight at anterior portion (close to costal margin), anterodistal angle narrowly rounded; exocorium broad, at level of end of median furrow about two times as broad as endocorium; membrane broadly rounded, with three longitudinal veins ( Fig. 10 : R, M, Cu), R short, simple, M and Cu both branching into several short stubs. Legs relatively long, femora rather narrow, unarmed, dorsal surface of tibiae with two longitudinal ridges enclosing a flat surface; tarsi 3-segmented.

Pregenital abdomen. Ventrite III with an insignificant median tumescence not surpassing anterior border of segment ( Fig. 9 ); posterolateral angles of ventrites obtuse, unarmed; connexivum greatly concealed by broad exocorium, only extreme posterolateral portion of laterotergites IV–VII visible in dorsal view; ventrite VII of ♂ greatly produced anteriad therefore ventrites III– VI shortened mesially (ventrite VII subequal in length to mesal length of ventrites III– VI combined) ( Fig. 3 ) .

External male genitalia of the single included species are described below.

Female unknown.

Type species. Zhengica cornuta sp. nov.

Etymology. The new genus is dedicated to Le-Yi Zheng, professor emeritus of Nankai University, Tianjin, preeminent specialist of East and Southeast Asian Heteroptera . Gender feminine.

Diversity and distribution. Monotypic; the type species is known from Shanxi, China .

Figures

FIGURES 1–3. Zhengica cornuta gen. nov., sp. nov., holotype. 1, dorsal view; 2, lateral view; 3, ventral view. Scale in mm.

FIGURES 4–8. Zhengica cornuta gen. nov., sp. nov., holotype. 4, anterior part of body, anterodorsal view (most exposed view of head and pronotum); 5, same, dorsolateral view; 6, lateral view; 7, left pterothoracic pleuron, hypocostal lamina and base of abdomen, ventrolateral view (in most exposed view of pleuron); 8, left scent gland ostiole and peritreme. Podomeres distad of coxae digitally removed in Figs. 5 and 6. Scales in mm.

FIGURES 9–13. Zhengica cornuta gen. nov., sp. nov., holotype. 9, middle portion of thorax and base of abdomen in ventral view; 10, posterior end of body, dorsal view; 11, same, ventral view; 12, same, posterior view; 13, same, lateral view. Scales in mm.