Taiwanaptera montana, Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2017

Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2017, A new genus and three new species of apterous Carventinae from China (Hemiptera: Heteroptera: Aradidae), Acta Entomologica Musei Nationalis Pragae (suppl.) 57 (1), pp. 35-46 : 44-45

Taiwanaptera montana sp. nov.

( Figs 7 , 10 )

Type locality. China, Yunnan, Lvchum, Huanglianshan, 1791 m, 22°56.625′N, 102°17.785′E.

Type material examined. HOLOTYPE: ♁, ‘ China, Yunnan, Lvchum / Huanglianshan 1791m / N22°56.625, E102°17.785 / 2009 V Bai XS / Ent.Mus. CAU, Beijing // HOLOTYPE / Taiwanaptera / montana nov. sp. / des. BAI, HEISS, CAI 2013 [red label]’ ( CAUC) . PARATYPE: ♀, labelled as holotype ( CEHI).

Additional material examined. 1 ♁ 1 ♀ ( Figs 8 , 12 ), ‘ China, Yunnan, Pingbian / Daweishan 1333m / N22°59.405, E103°41.072 / 2009 V 23 Bai XS / Ent.Mus.’ ( CAUC).

Description. Male (holotype, apterous). Surface of body rugose, legs and antennae finely granulate; coloration dark reddish brown, tibiae and antennal segments II–IV paler.

Head about as long as width across eyes (1.1/1.08); genae produced over clypeus, gaping at middle; antenniferous lobes with subparallel lateral margins; antennae 1.81× as long as width of head (1.95/1.08), length of antennal segments I/II/III/IV = 0.55/0.4/0.6/0.4, structure as T. guangxiana sp. nov.; eyes granulate, postocular lobes granulate, anteriorly without distinct tubercle, straightly converging to constricted neck; vertex rostrum arising from a slit-like atrium, shorter than head, rostral groove deep, closed posteriorly.

Pronotum about 2.7 times as wide as long (1.7/0.63); smooth ring-like collar with granulate transverse ridge posteriorly; lateral margins converging towards produced rounded anterolateral angles; disk granular, lateral sclerites separated at middle by a deep furrow; posterior margin sinuate, smooth and thickened.

Mesonotum 2.6 times as wide as long (1.95/0.75); scutellar projection with rounded apex its median ridge subparallel, half as wide as diameter of lateral sclerites, these rounded and raised laterally; surface rugose, depressed basally laterad of median ridge.

Metanotum consisting of oval sclerites laterad of mesonotal scutellar projection, deeply depressed toward inner angles, surface with an inclined smooth callosity; posterior margin bisinuate.

Mtg I+II raised at fusion line to metanotum, sloping posteriorly; structure as in T. guangxiana sp. nov.

Abdomen. Tergal plate with median elevation on mtg IV+V, lateral apodemal impressions with granulate surface around smooth apodemes; deltg II+III fused, deltg III–VII separated by sutures, their lateral margin raised; tergite VII raised medially for reception of pygophore; a small rim of dorsally reflexed vltg IV–VII is visible posteriorly to spiracles IV–VI which is triangularly produced on deltg VII.

Venter. Prosternum with a median ridge, meso- and metasternum fused to sternites II+III, with a flat matt depression medially; spiracles II–III ventral and not visible from above, IV sublateral, V–VII lateral and distinctly visible from above, VIII terminal on ptg VIII; sternite VII with 2 (1+1) distinct sublateral tubercles directed ventrally.

Legs long and slender, straight, protibial comb present; claws with long thin pulvilli.

Male genitalia. Pygophore pear shaped, transversely rugose; paratergites VIII small, reaching half of pygophore. The single male was not dissected for the study of parameres.

Female. Basically similar to male, however of larger size and with a wider and more rounded abdomen; tergite VII raised posteriorly to a transverse ridge, surface rather smooth with few transverse striae.

Measurements. Male (holotype). Length 5.3 mm; width of abdomen across tergite III – 2.50, IV – 2.55, V – 2.50, VI – 2.35. Female (paratype). length 6.2 mm; length/width of head 1.25/1.175; length/width of pronotum 0.65/1.85; length/width of mesonotum 0.75/2.2; length of antennal segments I/II/III/IV = 0.6/0.4/0.65/0.45; ratio length of antennae / width of head 1.79; width of abdomen across tergites III – 3.15, IV – 3.2, V – 3.15, VI – 2.9.

Variation. The two specimens from Yunnan, Pingbian, Daweishan share all essential characters of T. montana sp. nov., but show slight differences in minor structures (e.g. slightly longer antennae, somewhat wider antenniferous tubercles, postocular lobes more granulate, compare Figs 10, 12 ). The Daweishan mountains are located about 108 km distant from Huanglianshan and are not directly connected. These records are presently classified as T. montana sp. nov., but not included in the type series, as it cannot be excluded that the species from Daweishan represents an endemic taxon, which needs to be tested by molecular data and dissection of genitalia.

Etymology. The species name, montanus (- a, - um), is the Latin adjective referring to the mountainous region of Yunnan where it occurs.

Distribution. Recorded from China, Yunnan Province.

Figures

Figs 5–8. Taiwanaptera species. 5 – T. glabra Heiss & Nagashima, 2008, topotype, female, dorsal view (6.2 mm); 6 – T. guangxiana sp. nov., holotype, female, dorsal view (6.2 mm); 7 – T. montana sp. nov., paratype, female, dorsal view (Yunnan, Huanglianshan) (6.2 mm); 8 –T. cf. montana, female, dorsal view (Yunnan, Daweishan) (6.0 mm).

Figs 9–12. Taiwanaptera species, head and thorax. 9 – T. guangxiana sp. nov., holotype female; 10 – T. montana sp. nov., paratype, female (Yunnan: Huanglianshan); 11 – T. glabra Heiss & Nagashima, 2008, topotype, female; 12 – T. cf. montana, female (Yunnan: Daweishan). Arrows indicate differences in structure. Scale bar: 0.5 mm.