Baiaptera xinweiana, Heiss, Ernst, 2013

Heiss, Ernst, 2013, Aradidae from Vietnam I. Two new genera of micropterous Mezirinae (Hemiptera: Heteroptera: Aradidae), Zootaxa 3694 (6), pp. 587-595 : 592-594

Baiaptera xinweiana n. sp.

(Photo 10–15)

Diagnosis. The only species of this genus is recognized by the characters given in the generic diagnosis. It differs at once from the habitually similar species of Phamaptera n. gen. by the subrectangular not S-shaped evaporatorium.

Material examined: Holotype male labeled: Vietnam, Vinh phuc / Tamdao 1200m / N 21°30’, E 108°25’ / 7 VII 2011, Pham / Ent.Mus.IMNU Huhot // deposited at IMNU; paratypes: 3 males, 2 females with same data as holotype; 1 male, 1 female: Vietnam, Vinh phuc / Tamdao 1200m / N 21°30’, E 108°25’ / 18 V 2012, Pham / Ent.Mus. CAU Beijing. These specimens are designated and labeled accordingly.

Description. Male, micropterous; coloration of body and appendages reddish brown, evaporative structure darker, median parts of thorax and abdomen smooth submat, rugose and carinate elsewhere; legs and antennae with short adherent setae.

PHOTOS 10–15. Baiaptera xinweiana n. gen., n. sp. paratypes. 10– 12 male, 13– 15 female. 10,13 dorsal view; 11,14 lateral view; 12,15 ventral view.

Head. Longer than width across eyes (0.46/0.41); clypeus short only slightly longer than antenniferous lobes, apex rounded, genae adherent, dorsally elevated and granulate with a larger round tubercle; antenniferous lobes short and blunt, lateral margins subparallel; antennae 1.93x as long as width of head, segment I thickest slightly bent at base, II shortest barrel shaped, III longest subparallel tapering toward base, IV as long as I with pilose apex; eyes inserted in head; postocular lobes with few granules, roundly converging posteriorly to constricted neck; vertex with a granulate ridge flanked by 2 (1+1) ovate callosities; rostrum arising from a slit-like atrium, as long as head, rostral groove deep with carinate borders, closed posteriorly.

Pronotum. Subrectangular, nearly twice as wide as long; collar ring like, granulate at middle; disk with a transverse and two oval callosities anteriorly, smooth posteriorly; lateral margins consisting of 4(2+2) elevated granulate ridges, the anterior ones converging toward collar; lateral of these ridges an angulate smaller ridge converging anteriorly reaching only to posterior margin of collar; a row of granules parallel to this lateral ridge is placed at a lower level and visible from above; the large mat evaporative structures of metathoracic scent glands reflexed dorsally and visible from above conceale the posterior humeri of pronotum.

Meso- and Metanotum. Median smooth plate fused to mtg I+II, fusion lines between metanotum-mtgII and mtgI-mtgII laterally marked as rugose scars; anterolateral angles slightly carinate, two thin inclined sutures are present at middle of anterior margin; wing pads short, elevated with carinate margins depressed anteriorly; metanotum visible as a small rim posteriorly of wing pads.

Abdomen. Tergal plate longitudinally raised at middle, granulate at top with a larger round tubercle on mtg III; lateral apodemal impressions distinctly marked; deltg II+III fused into a triangular sclerite, its lateral margin carinate, inner margin of deltg II with a granulate elevated ridge; deltg III–VII separated by sutures, their lateral margin granulate with elevated posterolateral margins increasing from deltg V–VII; surface longitudinally striate with round apodemal impressions; tergite VII depressed at base, raised posteriorly.

Venter. Fused pro-, meso- and metasternum and sternites II+III, smooth at middle, the fusion lines marked by shallow impressions; metathoracic scent gland evaporatorium of irregular shape with rounded margins, covering completely the upper part of mesococae, reflexed and bent dorsally, its surface chagreened with an anterolateral groove dividing the larger lower from smaller upper lobe; sternites IV–VII smooth at middle, rugose laterally, median apodemal impressions with oval callosities; spiracles II ventral, III–VI sublateral on a tubercle of vltg III– VI thus slightly visible from above, VII lateral, VIII terminal on ptg VIII.

Legs. Femora incrassate on apical 2/3 slightly bent toward apex; tibiae cylindrical, tarsi twosegmented with long apical segment, claws with thin pulvilli.

Female. Basic structures as of male but of larger size; tergite VII depressed, posterior margin of deltg VII roundly elevated; ptg VIII produced posteriorly, as long as tricuspidate tergites IX and X visible at a lower level.

Measurements. Holotype male. Length 2.74; length/width of head 0.41/0.46; l/w pronotum 0.43/0.84/ length of antennal segments I/II/III/IV = 0.23/0.18/0.25/0.23; ratio length of antennae / width of head 1.93; width of abdomen 1.25; l/w pygophore 0.18/0.21. Variation of size in paratypes: 2.7–2.85.

Etymology. This interesting species is dedicated to Xinwei Niu (CAU) recognizing his ability and efforts to produce the photographs and his valuable assistance in various matters whenever requested during the recent visit of the author at CAU.

Distribution. To date Baiaptera xinweiana n. sp. is only recorded from Tam Dao mountain range in North Vietnam.