Vietnamaptera quarta, Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2011

Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2011, Three new species of the apterous Carventinae genus Vietnamaptera (Hemiptera: Heteroptera: Aradidae) from China, Zootaxa 3016, pp. 29-36 : 35

Vietnamaptera quarta n. sp.

( Figs.5, 6 , 12–14 ; Photos 4, 9)

Material examined. Holotype 3 glued on a card and labelled: P. R. China, Yunnan E / slope of Gaoligongshan / N 2746.8’, E 09833.1’, 12- / 15 VI 2009, 200– 300 m / sifting, V. Grebenikov // Holotype 3 / Vietnamaptera / quarta n. sp. / des. Bai, Heiss, Cai 2011 ( CNCO); paratypes: 33 collected with holotype are designated accordingly ( CNCO, CEHI). A specimen L5 was collected with the type series.

Diagnosis. As both other species quarta n. sp. is distinguished from bogiessa primarily by the clypeus shorter than antennal segment I, from secunda n. sp. and tertia n. sp. by several characters given in the key.

Description. Apterous male, colouration of body dark brown to black, antennae and legs dark brown; dorsal side with distinct irregular median elevations on thorax and abdomen; surface with deep punctures and rugosities.

Head: Slightly longer than wide (19/18); clypeus with triangular apex produced over lateral genae; antenniferous lobes short with subacute apices; antennae 1.36x as wide as width of head (24.5/18), segment I shortest and strongly bent at base, II more slender, III slender and longest, IV fusiform; length of antennal segments I/II/III/IV = 5.5/6/7/6; eyes granulate and somewhat inserted in head; postocular lobes with a few setigerous tubercles at base then carinate and straightly converging toward constricted collar; vertex with a granulate median ridge flanked by 2 (1+1) lateral carinae and ovate depressions. Rostrum arising from a slit-like atrium, as long as head, lateral margins of rostral groove carinate.

Pronotum: Pro-, meso-, and metanota and mtg I+II fused but separated by transverse grooves or sutures. About 4.3x as wide as long (43/10); anterolateral angles rounded and granulate distinctly produced over lateral projections of ring-like collar from which they are separated by deep incisures; lateral margins carinate and raised posterolaterally ending in knob-like upper lobe, whose lower lobe wider and subangulate; disk with 2 (1+1) triangular anteriorly enlarged carinate elevations with deep groove in between, lateral surface flattened.

Mesonotum: Wider than pronotum; lateral lobes strongly raised and granulate at ends; median bilobate granulate elevation fused to that of metanotum bearing a median groove, surface between rugose lateral and median elevations carinate and smooth.

Metanotum: Narrower than mesonotum and sloped from raised posterior margin toward deep groove between meso- and metanotum; lateral angles ending in a larger tubercle.

Mtg I+II: Completely fused; mtg I with to ovate granulate humps at middle separated by a deep groove, posteriorly followed by a bicarinate lower structure of mtg II, surface of latter and of lateral parts of fused mtg I+II smooth and glabrous.

Abdomen: Tergal plate with a narrow rugose median elevation this highest on mtg III–IV; lateral parts with deep punctures and carinae marking the apodemal impressions; surface glabrous; a pivot-like projection is not developed; structure of deltg II–VII and position of spiracles as in both other new species.

Venter: Deep transverse grooves separate pro- meso- and metasternum and sternites II–VII; prosternum keeled at middle, meso-, and metasternum each with three deep round punctures in transverse row between coxae, remaining surface smooth and glabrous; surface of sternites II–VII glabrous at middle, their lateral parts and vltg as well as pleural regions of thorax deeply punctured and rugose; sternite VII triangularly produced anteriorly, its surface with irregular rugosities except a smooth longitudinal median area (fig.6).

Legs: Structure as in secunda n. sp.

Genitalic structures: Basically as in other species; pygophore with a short split basal carina; paramers as figs. 12–14.

Measurements. Holotype 3: length 4.2 mm; width of abdomen across tergite III 2.55 mm; variation of length in paratypes 4: 4.2–4.3 mm.

Etymology. Refers to> quartus <(Latin) = the fourth species of the genus.

Figures

FIGURES 1 – 8. 1, 3, 5, 7 Head, pronotum and mesonotum of Vietnamaptera; 2, 4, 6, 8 sternites VI + VI of male; 1, 2 Vietnamaptera secunda n. sp.; 3, 4 Vietnamaptera tertia n. sp.; 5, 6 Vietnamaptera quarta n. sp.; 7, 8 Vietnamaptera bogiessa (from Zhang et al, 2010). Scale 1 mm. Abbreviations: g—gena; cl—clypeus; l 1 — lower lobe of elevated posterolateral angle of pronotum; ulditto, upper lobe; ms—mesonotum; pr—pronotum; st VI, VII—sternite VI, VII.

FIGURES 9 – 17 parameres in different positions of Vietnamaptera species. 9 – 11 secunda n. sp.; 12 – 14 quarta n. sp.; 15 – 17 tertia n. sp. Scale 0.1 mm.