Amblycara Bergroth, 1891

Tsai, Jing-Fu & Rédei, Dávid, 2014, A revision of the genus Amblycara (Hemiptera: Heteroptera: Pentatomidae), Acta Entomologica Musei Nationalis Pragae 54 (1), pp. 133-155 : 134-138

Genus Amblycara Bergroth, 1891

Abeona Stål, 1876: 67 , 102. Type species by monotypy: Abeona gladiatoria Stål, 1876 . Junior homonym of Abeona Girard, 1855 (Pisces) .

Amblycara Bergroth, 1891: 214 . New name for Abeona Stål, 1876 .

References. ATKINSON (1888): 146 ( Abeona , redescription, fauna of India); LETHIERRY & SEVERIN (1893): 179 (catalogue); DISTANT (1902): 211 (in key), 217 (redescription, fauna of British India); KIRKALDY (1909): 140 (catalogue); DISTANT (1918): 139 (listed); TAKARA (1957): 31 (listed); GROSS (1975): 51 (diagnostic characters, taxonomic placement); CASSIS & GROSS (2002): 524 (catalogue, Australia); RIDER (2006): 326 (catalogue, Palaearctic); TAKAI & ISHIKAWA (2012): 488 (redescription).

Diagnosis. Large (17–21 mm), light brownish pentatomids which can be recognized by the following combination of characters: conspicuous, broad, stramineous callosity present along anterior portion of lateral margin of pronotum; humeral angle produced, far surpassing margin of corium, apically sharply pointed; mesosternum with distinct but relatively low carina along midline; abdominal sternite II without process or projection; abdominal venter with a short longitudinal furrow occupying sternites III, IV and base of V.

Redescription. Body large (total length about 17–21 mm), broadly oval, dorsoventrally somewhat flattened ( Figs 1–4 ). Colour, integument and vestiture. Dorsum rather uniformly yellowish brown to light brown, with dense, dark punctation; anterior portion of lateral margin of pronotum and basal fourth of anterior (= external) margin of fore wing with a conspicuous, broad, stramineous callosity; lower surface of fore wings, abdominal mediotergites and inner margins of outer laterotergites red; venter of body stramineous, unpunctured. Integument glabrous except for short hairs on appendages, labium, and terminalia; integument rather smooth.

Head and cephalic appendages. Head rather elongate, 1.0–1.05 times as broad as its median length, 1.6–1.7 times as broad as interocular distance, dorsally flat, slightly narrowing anteriad, lateral margin weakly emarginate anteriad of eye, broadly rounded apically, clypeus slightly surpassing mandibular plates apically; antenniferous tubercle slightly surpassing lateral margin of head in dorsal view; buccula low, obtusely angulate subapically. Antenna simple, ¿ve-segmented, ¿rst segment not reaching apex of head, segment IIb 1.1–1.2 times as long as segment IIa. Labium reaching abdominal sternite III, apex of ¿rst segment not reaching base of head.

Thorax and thoracic appendages. Prothorax. Anterior margin of pronotum deeply concave, distinct impressed anterior collar not developed; anterolateral angle of pronotum surpassing lateral margin of eye, produced into a small, laterally or anterolaterally directed denticle; lateral margin of pronotum deeply concave, smooth, posterior portion directed subhorizontally, humeral angle more or less produced, directed anterolaterad or laterad, far surpassing costal margin of corium, sharply pointed apically; posterior margin nearly straight along base of scutellum. Prosternum flattened, bordered by a pair of low, obtuse, longitudinal carinae. Pterothorax. Scutellum of medium size, about 1.2 times longer than its width across base, frenal portion occupying approximately basal two thirds, gradually narrowing, rounded laterally, postfrenal portion occupying approximately apical third, narrowly tongue-shaped. Mesosternum with a distinct, relatively low, continuous median carina continued on metasternum as a somewhat broader elevation. Metathoracic scent gland ostiole associated with an elongate, rather straight peritreme gradually narrowed distally, approaching lateral margin of metapleurite; evaporatorium occupies most of metapleuron except for metepimeron and broadly extends onto mesopleuron approaching its anterior margin. Fore wing. Basal fourths of costal margins of the two wings nearly parallel in resting position, then conspicuously diverging, and strongly converging in their apical halves; apical margin strongly S-shaped; apex of membrane rather narrowly V-shaped, distinctly surpassing apex of abdomen in rest. Legs simple; femora unarmed; dorsal surface of tibiae, particularly those of mid and hind legs, with more or less distinct furrow; tarsal segment I about as long as or somewhat shorter than combined length of segments II+III, segment II very short.

Pregenital abdomen. Venter with a rather broad and deep, obtuse median longitudinal furrow ( Fig. 34 : mfu) occupying sternites III, IV and base of V; posterolateral angles of segments III–VII slightly but distinctly produced into a minute, black, sharp denticle. Tergite VIII of female broadly and shallowly emarginate posteriorly.

Distribution and diversity. The genus has remained monotypic so far, with the type species broadly distributed in the Oriental, Australasian and Oceanian Regions. A new species is described in the present paper from Taiwan and Palawan.

Figures

Figs 1–4. Males of Amblycara in dorsal (1–2) and ventral view (3–4). 1, 3 – A. gladiatoria (Stål, 1876); 2, 4 – A. innocens sp. nov. (holotype).

Figs 33–36. Amblycara gladiatoria (Stål, 1876) (33–34) and A. innocens sp. nov. (35–36), abdomen of female. 33 and 35 – dorsal view; 34 and 36 – ventral view. Scales in mm. Lettering: mfu = median furrow; sth = spermatheca; s5–s7 = sternites V–VII.