Carinostigmus longivertex Bashir & Ma, 2021

Bashir, Nawaz Haider, Li, Qiang & Ma, Li, 2021, Four new species of the genus Carinostigmus Tsuneki (Hymenoptera, Apoidea, Crabronidae) from Oriental China, with an updated key to the Chinese species, Journal of Hymenoptera Research 81, pp. 87-107 : 87

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Carinostigmus longivertex Bashir & Ma

sp. nov.

Carinostigmus longivertex Bashir & Ma sp. nov.

Figs 3 View Figure 3 , 6C View Figure 6

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).


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 View Figure 3 (inter-antennal tubercle not broad as Fig. 4B View Figure 4 ); 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 View Figure 3 (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).


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


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 View Figure 3 ). 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 View Figure 3 ); 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 View Figure 3 ); ocellar triangle area nearly flat, finely punctate; vertex behind ocelli with fine punctures (Fig. 3B View Figure 3 ); gena with sparse, coarse punctures and several sturdy, long, oblique transverse rugae (Fig. 3D View Figure 3 ); lower gena with coarse, dense punctures mixed with dense, irregular, longitudinal rugae medially [weakly] (Fig. 3C View Figure 3 ); occipital carina narrow, without foveolate (Fig. 3B View Figure 3 ); inner orbital furrow broad as 0.8 × pedicel length, with inner marginal carina distinct, coarsely foveolate (Fig. 3A View Figure 3 ); outer orbital furrow narrow as 0.5 × pedicel length, hind marginal carina inconspicuous, finely foveolate (Fig. 3D View Figure 3 ); 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 View Figure 3 ). 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 View Figure 3 ); width of collar in middle: length of collar in middle = 9: 45; mesoscutum with coarse, sparse punctures, anterior without striations (Fig. 3F View Figure 3 ), posterior area with several strong parallel ridges, longer in middle than laterally (Fig. 3E View Figure 3 ); admedian line inconspicuous [sometimes visible], extending to half of scutum length; notaulus deeply grooved, extending to anterior ¼ of scutum length (Fig. 3F View Figure 3 ); 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 View Figure 3 ); 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 View Figure 3 ); 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 View Figure 3 ); propodeum laterally with dense or sparse sturdy, oblique, longitudinal rugae anteriorly, and irregular, reticulation posteriorly (Fig. 3I View Figure 3 ).

Metasoma (Fig. 3G, H, K, L View Figure 3 ). Petiole dorsal nearly cylindrical, slightly convex and widened toward apex slightly, basal half of petiole with dense, slender, irregular transverse striations (Fig. 3G View Figure 3 ), petiole laterally with few weak carinae (Fig. 3H View Figure 3 ); 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 View Figure 3 ); pygidial area coriaceous, depressed, u-shaped, apex truncate (Fig. 3K View Figure 3 ).

Male. Unknown.


China (Yunnan).


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.