Phamaptera, 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 : 588-591

Phamaptera new genus

Type species: Phamaptera lamdongensis n. sp.

Diagnosis. Micropterous, small size (2.6–3.1mm); body oval, antennae stout, surface submat and smooth with elevated structures on pronotum, deltg II and tergal plate; metathoracic scent gland evaporatoria large and Sshaped, reflexed anterolaterally and dorsally.

Description. Head. About as wide as long; clypeus short, apex rounded; antenniferous lobes shorter than clypeus, blunt; antennae stout about 1.5x as long as width of head; segment I thickest, II shortest, III longest, IV about as long as I with pilose apex; eyes inserted in head; postocular lobes rounded; rostrum arising from a slit-like atrium as long as head.

Pronotum. Subrectangular, roundly converging anteriorly; disk depressed at middle, flanked by 2 (1+1) carinae converging anteriorly; lateral margins of anterior lobe carinate, anterolateral angles rounded, slightly produced over collar; dorsally reflexed S-structure of metathoracic evaporatorium concealing posterolateral humeri and is visible from above.

Meso- and Metanotum. Fused to each other and to mtg I+II without visible fusion lines, consisting of a smooth medially slightly convex plate and lateral sclerites of wing pads, these separated by a suture; mtg II with shallow impressions laterally.

Abdomen. Tergal plate with a longitudinal elevation, lateral parts smooth and flat; deltg II+III fused with carinate lateral margin, deltg II with a distinct granulate elevation along inner margin; deltg III–VII separated by sutures, lateral margins evenly rounded, surface flat with shallow impressions.

Venter. Pro-, meso-, and metasternum fused to mst II+III, fusion lines marked by shallow furrows, surface smooth; sternites III–VII separated by sutures, surface smooth submat, lateral margins rugose; spiracles II–VI placed on tubercles close to lateral margin, not visible from above, VII lateral, VIII terminal on paratergites VIII.

Legs. Femora incrassate apically, trochanters distinct, tibiae straight, tarsi two-segmented, claws with thin pulvilli.

Etymology. It is a pleasure to dedicate this conspicuous new flat bug genus to Minh Lan Pham (Lao Cai, Vietnam, and CAU), who discovered and collected it.

Discussion. The habitus of Phamaptera n. gen. resembles the micropterous genus Hutanicoris Heiss 1993 described from Malaysia and Indonesia; however, the scent gland structure and evaporatorium are smaller and elongate-oblique, and the scutellum is distinctly marked by a suture in Hutanicoris.

The structure and outline of the anterolaterally and dorsally reflexed evaporatorium of the metathoracic scent gland are unique and not yet known from any other Oriental or Indoaustralian Mezirinae ; they therefore distinguish this genus from all Mezirinae genera with this character.

Phamaptera lamdongensis n. sp. (Photo 1–6)

Material examined: Holotype male labeled: Vietnam, Lamdong Pro. / Dalat, 1500m / N 12°30’, E 108°25’ / 7 VII 2011, Pham / Ent. Mus. IMNU Huhhot // deposited in IMNU; paratypes: 4 males, 2 females with same data as holotype; 1male, 1 female: Vietnam, Lamdong Pro. / Bidoup-Nu Park / Giangly, 1500m / N 12°11.085 / E 108°41.051 / 11 V 2012 M.L. Pham (IMNU, CAU, CEHI). These type specimens are designated and labeled accordingly.

Diagnosis. Phamaptera lamdongensis n. sp. is closely related to the second species of this genus P. bachmaensis n. sp. but is distinguished by the much thinner whitish S-structure of the evaporatorium (compare photo 1 and 7).

Description. Male, micropterous, of dark brown coloration; surface submat with carinate elevations on pronotum and deltg II.

PHOTOS1 – 6. Phamaptera lamdongensis n. gen., n. sp. paratypes. 1– 3 male, 4– 6 female; 1,4 dorsal view; 2,5 lateral view; 3,6 ventral view.

Head. Slightly wider across eyes than long (0.54/0.45); clypeus short, dorsally and apically rounded, genae thin adherent; antenniferous lobes shorter than clypeus, apex blunt, lateral margins parallel; antennae short and stout, 1.54x as long as width of head; segment I slightly clavate and thickest, II shortest and thinner, III longest and cylindrical, IV about as long as I tapering toward base, apex pilose; eyes granular inserted in head; granular postocular lobes roundly converging to constricted neck; vertex granulate flanked by 2(1+1) incised ovate callosities; rostrum arising from a slit-like atrium, as long as head, rostral groove deep with carinate lateral margins, open posteriorly.

Pronotum. Subrectangular about twice as wide as long; disk flat at middle, raised posterolaterally, a longitudinal median sulcus meets posteriorly a curved transverse groove; lateral margins raised and carinate converging anteriorly, reaching triangular collar; anterolateral margins carinate, anterolateral angles rounded slightly produced over collar, this delimited posteriorly by a convex suture, its surface smooth; posterolateral humeri concealed by the dorsally reflexed evaporatorial structures of metathoracic scent glands which are visible from above, a thin gaping S-shaped whitish channel is the most striking feature.

Meso- and Metanotum. Fused to a wide medially slightly convex smooth plate which is fused posteriorly to mtg I+II; no fusion lines discernible; anterolateral angles triangularly elevated, laterally delimited by oval wing pads, these carinate anterolaterally and separated from median plate by sulci; mtg II laterally depressed with 4(2+2) round apodemal markings; posterior margin slightly concave.

Abdomen. Tergal plate longitudinally elevated at middle, lateral parts flat with shallow apodemal markings, deltg II+III fused to an anteriorly triangular sclerite reaching ½ of wing pads, their lateral margins carinate, inner margin with a granulate elevated ridge; deltg III–VI separated by sutures, their lateral margins slightly carinate, surface with distinct apodemal impressions; tergite VII with a transverse basal furrow raised posteriorly; posterior margins of ptg VII raised and carinate.

Venter. Fused median plate consisting of a round prosternal, a transverse oval mesosternal—and a wider polygonal metasternal sclerite, this posteriorly fused to mst II+III; fusion lines indicated by shallow transverse impressions; pleural and lateral parts of venter rugose; sternites III–VII separated by sutures, surface smooth and submat; spiracles II–VI placed on a tubercle of vltg II–VI close to lateral margin but not visible from above, VII lateral and visible, VIII terminal on ptg VIII.

Genitalic structures. Pygophore rounded and declivous posteriorly, surface granulate; ptg VIII small and clavate, reaching ½ of pygophore.

Legs. As in generic description.

Female. Generally as male but of slightly larger size and more rounded abdomen; tergite VII flattened at base raised posteriorly into a transverse carina, posterior margins of deltg VII likewise carinate, ptg VIII small and rounded, posteriorly produced and as long as tricuspidate tergites IX+X at a lower level.

Measurements. Holotype male. Length 2.81; length/width of head 0.45/0.54; l/w pronotum 0.38/0.85/ length of antennal segments I/II/III/IV = 0.22/0.12/0.28/0.21; ratio length of antennae / width of head 1.54; width of abdomen 1.30; l/w pygophore 0.21/0.25. Variation of size in paratypes: males 2.59–2.75, females 2.55–3.11

Etymology. Named after the Lamdong province in South Vietnam, where this genus and species were found.

Phamaptera bachmaensis n. sp. (Photo 7–9)

Material examined: Holotype male labeled: Vietnam, Thuathienhue / Pro., Bachma Park 7 1180–1290m / N 16°11.694 / E 107°51.438 / 2–4 V 2012 M.L.Pham // deposited at CAU. Attached red label: Phamaptera n. gen. / bachmaensis n. sp. / des. E.HEISS 2013.

Diagnosis. Very close to lamdongensis n. sp. sharing the same habitus and S-shaped metathoracic scent gland evaporatorium; it differs however by shorter clypeus, angulate not rounded anterolateral angles of pronotum, by more flattened median meso- metanotal plate with a thin transverse suture indicating the fusion line with mtg I+II and by distinctly wider S-structure of scent gland evaporatorium.

Description. Micropterous, of small size; body subparallel, surface smooth and submat with carinae as in lamdongensis n. sp.; as most of the body structures are shared by both species, their differences are indicated as follows.

PHOTOS 7 – 9. Phamaptera bachmaensis n. sp. holotype male. 7 dorsal view; 8 lateral view; 9 ventral view.

Head. Slightly wider than long (0.51/0.39), clypeus medially elevated, apex rounded, as long as antenniferous lobes; these with more rounded lateral margins and apices; antennae longer, 1.68x as long as width of head; segment I+IV of equal length, II shortest, III relatively shorter and only slightly longer than I, distinctly tapering toward base, IV with pilose apex; other structures as in lamdongensis n. sp.

Pronotum. Subrectangulate, structure of disk and lateral carinae as in lamdongensis n. sp., anterolateral carinae straightly converging toward collar, their anterior apex produced over collar; posterolateral humeri covered by reflexed dorsally visible evaporative structure of metathoracic scent glands, the diameter of the whitish Sstructure loop about as wide as lateral carinae of disk.

Meso- and Metanotum. Median fused plate flat, anterolateral angles slightly raised; anterolateral margins of oval wing pad sclerites raised and granulate; fusion line with mtg I+II indicated by a thin sulcus, mtg II with a short transverse groove anterolaterally.

Abdomen. General structure as in lamdongensis n. sp., posteroexterior angles of deltg VI and VII roundly elevated.

Venter, legs and genitalic structure. Basically as in lamdongensis n. sp..

Measurements. Lenth 2.9; length / width of head 0.51/0.39; w/l pronotum 0.40/0.85; length of antennal segments I/II/III/IX = 0.24/0.13/0.25/0.24; l/w of pygophore 0.18/0.22.

Etymology. Refers to the Bachma Park in Central Vietnam, the type locality of this species.

Distribution. Both species of Phamaptera n. gen. are only recorded from the type localities in indigenous forests at an altitude of about 1500m in South Vietnam (Dalat) and about 1300m in Central Vietnam (Bachma).