Anhanga Distant, 1887

Bianchi, Filipe M., Barcellos, Aline & Grazia, Jocelia, 2016, Rediscovering Anhanga: redescription and considerations on its taxonomic placement (Hemiptera: Heteroptera: Pentatomidae), Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 557-566 : 558-560

Anhanga Distant, 1887

Anhanga Distant, 1887 : lx (original description). Type species: Anhanga modesta Distant, 1887 , by monotypy Ahanga (incorrect subsequent spelling): LETHIERRY & SEVERIN (1893): 89 (catalogue). Anhanga : KIRKALDY (1909): 221 (catalogue).

Diagnosis. In addition to DISTANT’s (1887) original description, the following features are highlighted. Antennae 5-segmented; first antennal segment reaching but never surpassing anterior margin of head. Head somewhat long, narrowed and rounded in front; mandibular plates reflexed, convergent at apex and much longer than clypeus. Basal segment of rostrum arising anteriorly to imaginary line crossing head at anterior margin of eyes ( Fig. 1B ); first rostral segment surpassing posterior limits of bucculae; apex of rostrum surpassing mesocoxae. Anterolateral margins of pronotum slightly reflexed, crenulate along anterior half; lateral angles rounded and not projecting. Scutellum not exceeding posterior margin of connexival segment V. Prosternum slightly projected. Peritreme spout-shaped, very short, about three times diameter of ostiole; evaporatorium covering 2/3 of metapleuron. Hemelytranot covering connexivum. Tarsi 3-segmented. Abdominal venter not tuberculated, without median sulcus or spine. Spiracles placed on callus. Pair of trichobothria present onurosternites III–VII along imaginary line connecting the spiracles.

Male genitalia. Pygophore globose, posterolateral anglesprojected, spatulate, convergent. Dorsal rim concave and slightly projected over segment X. Ventral rim with open V-shaped excavation, bearing 1+1 acute projections close to posterolateral angles. Superior layer of ventral rim well developed, with 1+1 blunt and hairy projections directed dorsad. Parameres paddle-like. Segment X lozenge-shaped; posterior half grooved and hairy.

Female genitalia. Gonocoxites VIII quadrangular; anterolateral margin rounded and posterior margin emarginated. Gonocoxites IX trapezoidal. Laterotergites VIII presenting spiracles. Laterotergite VIII and IX similar in length. Laterotergites IX rounded at apex, not surpassing transverse band linking laterotergites VIII. Ring sclerites present. Vesicular area of receptaculum seminis well developed. Capsula seminalis with finger-like process.

Figures

Fig. 1. Anhanga modesta Distant, 1887. A – dorsal view; B – magnification of the head in ventral view, dashed line highlighting the basal segment of labium arising anteriorly to the imaginary line traversing head at anterior margin of eyes; C – ventral view; D – magnification of external scent efferent system of metathoracic scent glands; E – magnification of abdomen, highlighting the placement of the pair of trichobothria (arrows) along the imaginary line of spiracles on urosternites VI and VII. Scale bar: 5 mm.