Parachinavia ROCHE, 1977

Grazia, J. & Schwertner, C. F., 2008, Review of Parachinavia ROCHE (Hemiptera, Pentatomidae, Pentatominae), Advances in Heteroptera Research, Moscow: Pensoft Publishers, pp. 111-121 : 112-114

Parachinavia ROCHE

Parachinavia Roche, 1977: 564 (nov. gen.).

Type species: Parachinaviacreolea Roche

Diagnosis. Recognized among green stink bugs by oval body, small to medium size, color pale green to ochraceous in preserved specimens, punctures concolorous and regularly distributed, ocelli on a pale callositybut body without callosityed areas; unique apomorphies among the group include the following characters of the female genitalia: gonocoxites 8 conspicuously inflated, posterior margin of gonocoxites 9 slightly convex, anterior margin concave; secondary thickenings of gonapophyses 9 in 1+1 small caps. Distinguished from Acrosternum by several morphological characters (see comments below).

Description. General color pale green to ochraceous in preserved specimens; apical half of antennal segment III and most of segments IV and V reddish. Dorsal and ventral surfaces with concolorous punctures regularly distributed, coarse; callosity areas absent. Broad, oval, of medium size (9 to 12 mm).

Head triangular, juga as long as tylus. Ocelli on a pale callosity; lateral margins of juga slightly concave. Antennifer tubercle not seen from dorsal side; lateral spine of antennifer tubercle obsolete, ventral spine absent. Antennae five segmented; first segment not surpassing apex of head, antennal segment increasing in length from I to V; segment IV and V subequal. Bucculae low, uniform in height, margins subparallel and evanescent near base of head. Rostrum just attaining or surpassing metacoxae; segment Inot surpassing bucculae; segment II shorter than III and IV combined. Pronotum trapezoidal, humeral angles not developed; antero-lateral margins rectilinear. Scutellum almost as broad as long at base, apex surpassing level of fourth connexival segment; parafrenal lobe about two and a half size of postfrenal lobe. Hemelytra: corium surpassing anterior half of connexival segment VI; membrane hyaline, sometimes with green speckles. Conexivum more or less exposed, postero-lateral angles slightly pronounced, tiny black spot on urosternites present.

Mesosternum conspicuously carinate; metasternum longitudinally hexagonal, longer than wide, feebly sulcate. Ostiole of metapleural scent gland elliptical, developed ina long, narrow ruga, evanescent at apex, extending to the ¾ of the metapleura; mesopleural evaporatorium wide, occupying almost half of sclerite; metapleural evaporatorium also wide, occupying most of sclerite. Legs immaculate, tibia dorsally sulcate. Abdominal spine short, blunt, scarcely attaining metacoxae. Spiracles concolorous; lateral trichobothria placed along spiracular line. Abdominal midline with scattered concolorous punctures.

Male genitalia ( Figs 4-19 ). Pygophore quadrangular, postero-lateral angles not developed, round. Genital cup opening dorso-posterior. Superior process (sp) of genital cup present. Dorsal rim (dr) sinuous at middle, scarcely projected over segment X; lateral thirds of dorsal rim with 1+1 spines (sdr). Ventral rim (vr) of pygophore shallowly concave at middle (me); infolding of ventral rim (ivr) wide on dorsal view, simple, inflated laterad to inferior ridge. Inferior ridge (ir) not visible in ventral view. Segment Xperpendicular in relation to the sagittal plane of pygophore, quadrangular in outline; dorsal surface uneven at basal half, apical half without processes. Parameres (pa) uniramous, laterally flat; apical part of parameres (ap) more or less wide and latero-basally directed; hairy process at base of paramere (bp) present. Phallotheca (ph) tubular, more than four times as long as vesica (v). Vesica short, straight, with 1+1 processes (pv); processes subequal in length to vesica and obscured by conjunctiva (cj) when not extended.

Female genitalia ( Figs 20-21 ). Posterior margin of segment VIII in open Ualong gonocoxites 8 (gc8). Laterotegites 8 (la8) as long as laterotergites 9 (la9); spiracles (s) present on basal angle of laterotergites 8. Gonocoxites 8 conspicuously inflated, posterior margin slightly convex; sutural margins convex, juxtaposed only at middle. Surface of basal 2/3 of laterotergites 9 concave. Posterior margin of gonapocoxites 9 (gc9) slightly concave, anterior margin concave, prolonged anteriorly in 1+1 short arms; secondary thickenings of gonapophyses 9 (sg9) in 1+1 small caps on anterior margin; chitinellipsen (ch) present. Ductus receptaculi (dre) before vesicular area (va) almost as long as ductus receptaculi after vesicular area; in this portion, reeled and strongly inflated before anterior flange (af). Internal ductus of vesicular area reeled at basal fourth. Capsula seminalis (cs) as long as pars intermedialis (pi), assymetrical and with one projection anteriorly bent. Comments. Parachinavia was described for P. creolea , in comparison with Acrosternum heegeri , based on three male specimens (Roche 1977). Among green stink bugs, Acrosternum and Parachinavia represent a monophyletic group, sharing the following synapomorphies ( Schwertner 2005): antennifer tubercle obsolete, not visible in dorsal view; mesosternum conspicuously carinate; ductus receptaculi after vesicular area reeled and strongly inflated before anterior flange; capsula seminalis asymmetrical and with one projection anteriorly bent. Parachinavia can be readily distinguished from Acrosternum by punctures apparently coarser and less dense, scutellum almost as broad as long at base, postero-lateral angles of pygophore not developed, superior process of genital cup conspicuous, dorsal rim only slightly projecting over segment X, lateral third of dorsal rim with 1+1 spines, ventral rim of pygophore shallowly concave at middle; infolding of ventral rim simple, slightly inflated laterad to inferior ridge, and wide in dorsal view; inferior ridge not visible in ventral view; segment Xwith dorsal surface uneven at basal half, apical half of segment Xwithout processes, internal ductus of vesicular area reeled at basal fourth, and capsula seminalis as long as pars intermedialis.

Distribution. Widely distributed in the Afrotropical and Afrotemperate regions, including the west-Pacific islands of Seychelles.

Figures

Figs 1-6: Parachinavia creolea, holotype ♂. 1-3, Habitus in dorsal, ventral and lateral views; 4-6, pygophore in dorsal, posterior and lateral views (dissected and partially damaged ) .

Figs 7-11: Parachinavia creolea, holotype ♂. 7-8, Leftparemere in latero-medialand latero-external views; 9-11, Phallus in dorsal, lateral, and ventral views (aa- articulatory apparatus; ap- apicalportion of paramere; bp-basalportion of paramere; cj- conjunctiva; dsd- ductus seminis distalis; dsp- ductus seminis proximalis; er- ejaculatory reservoir; pc- processus capitati; ph- phallotheca; v- vesica).

Figs12-19: Parachinavia prunasis nov.comb. 12-14, Pygophore in dorsal, lateraland ventral views; 15-16, Left paramere in latero-medial and latero-external views; 17-19, Phallus, with vesica expanded, in dorsal, lateral and ventral views; articulatory apparatus omitted (cj- conjunctiva; drdorsal rim; dsd- ductus seminis distalis; dsp- ductus seminis proximalis; er- ejaculatory reservoir; ivr- infoldingof ventral rim; me- medianexcavationof ventral rim; pa- paramere; ph- phallotheca; pv- processus vesicae; sdr- spine of dorsal rim; sp- superior processes of dorsal rim; v- vesica; vr- ventral rim; X- segment X).

Figs 20-21: Parachinavia prunasis nov. comb. 20- genital plates; 21- Ectodermal ducts and laterotergites, gonocoxites an gonapophyses of ninth segment (af- anterior flange; atv- anterior thickenings of vaginal intima; ch- chitinellipsen; cs- capsula seminalis; dre- ductus recepatuculi; g9- gonapophyses 9; gc8- gonocoxites 8; gc9- gonocoxites 9; la8- laterotergites 8; la9- laterotergites 9; pf- posterior flange; pi- pars intermedialis; s- spiracles; tg9- thickenings of gonapophyses 9; va- vesicular area; VII- segment VII; X- segment X).