Carinostigmus longivertex Bashir & Ma sp. nov.

Figs 3, 6C

Type material.

Holotype: ♀, China: Yunnan: Mengla: Wangtianshu Forest Park, 21°34'N, 101°39'E, 1.V.2005, coll. Peng Wang (YNAU). Paratypes: 2♀, same data as holotype; 1♀, China: Yunnan: Dehong: Nabang, 24°26'N, 98°35'E, 15.V.2009, No. 201005193, coll. Jie Zeng (YNAU).

Diagnosis.

Within Chinese Carinostigmus, this new species can be separated by the following character combinations: free margin of clypeus conspicuously produced, slightly emarginated in middle; median and lower frons with shallow frontal median furrow; inter-antennal tubercle distinctly broadened at apex; vertex behind ocelli finely punctate; lower gena coarsely punctate; occipital carina without foveolate; anterior pronotal ridge narrowly emarginate in middle; scutellum median line impressed; propodeum with small smooth area medially; basal half of petiole with transverse striations; petiole laterally carinate. Carinostigmus longivertex sp. nov. resembles C. iwatai (Tsuneki) 1954, but can be distinguished from it by the following characters (characters of C. iwatai in brackets): free margin of clypeus emarginated medially (free margin of clypeus truncate medially); inter-antennal tubercle distinctly broadened at apex as Fig. 3B (inter-antennal tubercle not broad as Fig. 4B); lower gena with coarse, dense punctures mixed with dense, irregular, longitudinal rugae medially (lower gena with fine, sparsed punctured, without rugae); outer orbital furrow narrow as Fig. 3D (outer orbital furrow broad); admedian and parapsidal lines inconspicuous (admedian and parapsidal lines distinct); notaulus deeply grooved (notaulus shallowly grooved); metanotum median area with dense, slender, transverse rugae (metanotum without rugae); omaulus broad, 1.2 × pedicel width (omaulus narrow, 0.8 × pedicel width); basal half of petiole with dense, slender, irregular transverse striations dorsally (petiole without striations) and pygidial area u-shaped (pygidial area oval shaped).

Description.

Female (Figs 3, 6C): length of body 6 [5.7-6.1] mm.

Colouration.

Body black and shiny, except for the following: mandible (black basally and apically) and labrum reddish brown; palpi, scape and pedicel fulvous; flagellomeres reddish brown to dark brown; pronotal lobe ivory; tegula and forewing veins dark brown; fore trochanter, base and apex of femur, tibia, tarsi fulvous to reddish brown (remainder dark brown to black); mid trochanter, base and apex of femur, tibia extensively, tarsi fulvous; hind trochanter reddish brown, tibia and tarsus dark brown; setae on mandible and margin of clypeus yellowish.

Head (Fig. 3A-D). Mandible tridentate apically; labrum pentagonal, gently round toward apex; clypeus moderately convex, with sparse, coarse punctures; free margin of clypeus conspicuously produced with two distinctly triangular teeth, slightly emarginated in middle (Fig. 3A); setae on mandible and margin of clypeus long, more than labrum length; median and lower frons coriaceous, with broad, shallow frontal median furrow, a strong frontal median longitudinal carina, inter-antennal tubercle distinctly broadened at apex, long, more than midocellus diameter; upper frons with sparse, fine punctures, longitudinal carina distinct anteriorly, not reaching anterior ocellus (Fig. 3A); ocellar triangle area nearly flat, finely punctate; vertex behind ocelli with fine punctures (Fig. 3B); gena with sparse, coarse punctures and several sturdy, long, oblique transverse rugae (Fig. 3D); lower gena with coarse, dense punctures mixed with dense, irregular, longitudinal rugae medially [weakly] (Fig. 3C); occipital carina narrow, without foveolate (Fig. 3B); inner orbital furrow broad as 0.8 × pedicel length, with inner marginal carina distinct, coarsely foveolate (Fig. 3A); outer orbital furrow narrow as 0.5 × pedicel length, hind marginal carina inconspicuous, finely foveolate (Fig. 3D); length of scape: length of pedicel: length of flagellomere I: width of flagellomere I = 26: 10: 11: 3; maximum head width, dorsally: distance from upper margin of the frons to occipital carina in middle: distance from vertex to clypeal margin in middle = 82: 57: 65; maximum eye length, laterally: maximum eye width, laterally: maximum eye width, frontal view = 51: 30: 19; inner-orbital width, medially: outer-orbital width, medially: occipital carina width, dorsally = 5: 3: 1; maximum width of gena, laterally: distance between antennal sockets, frontal view = 28: 15; distance between inner margins of hind ocelli: distance between outer margin of hind ocellus and nearest inner eye margin: distance between posterior margin of hind ocellus and occipital carina, dorsally = 7: 16: 29.

Mesosoma (Fig. 3E, F, I, J). Pronotal collar strongly elevated medially, triangular, with several inconspicuous rugae laterally, anterior pronotal ridge strong, narrowly emarginate in middle, lateral angles strong and distinctly projected (Fig. 3E); width of collar in middle: length of collar in middle = 9: 45; mesoscutum with coarse, sparse punctures, anterior without striations (Fig. 3F), posterior area with several strong parallel ridges, longer in middle than laterally (Fig. 3E); admedian line inconspicuous [sometimes visible], extending to half of scutum length; notaulus deeply grooved, extending to anterior ¼ of scutum length (Fig. 3F); parapsidal line weakly impressed; scutellum with fine, sparse punctures, median line impressed; metanotum with several sturdy, longitudinal rugae on lateral area, median area with dense, slender, transverse rugae (Fig. 3E); mesopleuron with coarse, sparse punctures, hypoepimeral and posterior area with slender or sturdy, dense, long longitudinal rugae posteriorly; scrobal suture, omaulus and hypersternaulus broad and distinct, foveolate, scrobal suture short, incomplete (Fig. 3I); propodeal enclosure moderately impressed, triangular, with sturdy longitudinal rugae, median area reticulate; propodeum posterior with broad shallow median groove, sparse, sturdy, oblique longitudinal rugae anteriorly, small smooth area medially, and irregular reticulation posteriorly (Fig. 3J); propodeum laterally with dense or sparse sturdy, oblique, longitudinal rugae anteriorly, and irregular, reticulation posteriorly (Fig. 3I).

Metasoma (Fig. 3G, H, K, L). Petiole dorsal nearly cylindrical, slightly convex and widened toward apex slightly, basal half of petiole with dense, slender, irregular transverse striations (Fig. 3G), petiole laterally with few weak carinae (Fig. 3H); maximum width of petiole, dorsally: length of petiole, laterally: maximum length of metasomal tergum I, dorsally: maximum width of metasomal tergum I, dorsally = 8: 60: 37: 42; metasomal sterna IV-VI with fine, dense punctures, remainder nearly impunctate (Fig. 3L); pygidial area coriaceous, depressed, u-shaped, apex truncate (Fig. 3K).

Male. Unknown.

Distribution.

China (Yunnan).

Etymology.

The name, Carinostigmus longivertex, is derived from the Latin words longus (= long) and vertex (= vertex), referring to the very long vertex, with the ocello-occipital distance (OCD) being four times as long as postocellar distance (POD), 29: 7. A noun in apposition.