Passaloecus tuberangustus Bashir & Ma

Bashir, Nawaz Haider, Du, Shi-Jie, Yue, Dan, Li, Qiang & Ma, Li, 2019, The genus Passaloecus Shuckard (Hymenoptera: Crabronidae) from China with four new species and two new records, Zootaxa 4629 (3), pp. 428-440: 433-435

publication ID

https://doi.org/10.11646/zootaxa.4629.3.10

publication LSID

lsid:zoobank.org:pub:DF21032F-0A10-42D5-A892-75A83C4217D8

persistent identifier

http://treatment.plazi.org/id/F7CEFC53-7D05-4284-A86A-287BF74DB500

taxon LSID

lsid:zoobank.org:act:F7CEFC53-7D05-4284-A86A-287BF74DB500

treatment provided by

Plazi

scientific name

Passaloecus tuberangustus Bashir & Ma
status

sp. n.

3. Passaloecus tuberangustus Bashir & Ma  , sp. n.

( Figures 3View FIGURE 3; 5c, gView FIGURE 5; 6c, gView FIGURE 6; 7e, fView FIGURE 7)

Material examined. Holotype: ♀, China: Gansu: Dangxian: Daheba , 2530m, 35°46’N, 102°54’E, 30.VII.2004, No. 200707825, coll. Shi Min ( ZU)GoogleMaps  . Paratypes: 1♀, same data as holotypeGoogleMaps  ; 2♀♀, same data as holotype except No. 200707617, 200707380, coll. Chen Xuexin ( ZU)GoogleMaps  ; 2♀♀, No. 200707774, 200707775, coll. Wu Qiang ( ZU)  ; 3♂♂, No. 200707783, 200707761, 200707791, coll. Wu Qiang ( ZU)  ; 1♂, NO.200707823, coll. Shi Min ( ZU)  ; 2♀♀, China: Shanxi: Liuba: Ziboshan Mount , 1632m, 33°32'N, 106°59'E, 3–4.VIII.2004, No. 200707302, 200707846, coll. Shi Min ( ZU)GoogleMaps  .

Diagnosis. This species resembles P. singularis Dahlbom, 1844  in sharing: mandible bidentate apically; labrum distinctly constricted subapically; clypeus slightly convex medially; ocellar triangle moderately convex, slightly coriaceous, with fine, dense punctures; mesoscutum coarsely coriaceous, with midsize dense punctures; notaulus inconspicuously impressed, extending to ⅓ of mesoscutum; parapsidal line conspicuous, long; episternal sulcus conspicuously crenate; metapleuron shiny; propodeal enclosure not delimited by carina, with conspicuous, irregular reticulation; posterior surface of propodeum with irregular rugae, lateral surface shiny anteriorly, nearly smooth, with inconspicuous, dense, oblique, longitudinal striation; metasoma half mat, slightly coriaceous, with fine, dense punctures.

It differs from P. singularis Dahlbom  by the following characters: petiole slightly elongate, longer than wide, nearly 3 × as long as midocellar diameter; free margin of clypeus broadly produced medially, slightly concave and turned up apically; metasoma slightly constricted between segments I and II; middle and upper frons with fine, dense punctures; vertex behind ocelli with fine, dense punctures; gena dorsally with fine, dense punctures, coarsely coriaceous; occipital carina usual, simple; pronotal collar without anterior carina; in male, flagellomeres III–VIII beneath with ivory linear tyloids, III, VIII, short, IV–VII, long. In P. singularis Dahlbom  the petiole is short, nearly 1 × as long as midocellar diameter; free margin of clypeus truncate, slightly tridentate medially, teeth inconspicuous; metasoma distinctly constricted between segments I and II; middle and upper frons with large, dense punctures; vertex behind ocelli with midsize, dense punctures; gena dorsally with midsize to large, dense punctures, distinctly coriaceous; occipital carina much narrowed throughout, distinctly crenulate ventrally; anterior margin of pronotal collar with strong carina, without antero-lateral corner; in male, flagellomeres II–IX beneath with brownish oval tyloids, II, IX, short, III–VIII, long.

Description. Female and male. Black; labrum, pedicel, and tegula dark brown; palpi ivory; flagellum black, moderately dark brown; pronotal lobe ivory; forewing veins brown. Outer margin of fore tibia with narrow, yellowish band (remaining tibia dark brown), tarsi dark brown, fore trochanter and fore femur slightly dark brown; petiole, and metasoma black but apical segment dark brown.

Mandible bidentate apically ( Fig. 3View FIGURE 3 ad). Labrum distinctly constricted subapically ( Fig. 3View FIGURE 3 ad). Clypeus slightly convex medially, with sparse, fine, punctures, slightly coriaceous, free margin of clypeus broadly produced medially, slightly concave and turned up apically ( Fig. 3View FIGURE 3 ad). Lower frons coarsely coriaceous; interantennal tubercle inconspicuous ( Fig. 3View FIGURE 3 ad); frontal median carina inconspicuous; middle and upper frons coarsely coriaceous, and with fine, dense punctures; ocellar triangle moderately convex, slightly coriaceous, with fine, dense punctures. Vertex behind ocelli with fine, dense, punctures and dense, fine, transverse striation, coarsely coriaceous ( Fig. 3bView FIGURE 3); gena dorsally with fine, dense punctures, coarsely coriaceous. Lower gena with fine, sparse punctures, slightly coriaceous; occipital carina usual, simple.

Pronotal collar without anterior carina or anterolateral angle. Mesoscutum coarsely coriaceous, with midsize dense punctures that are 0–1 × diameters apart, anterior slope vertical and high, nearly 2 × midocellar diameter; scutal patches absent; admedian line conspicuous, extending to ⅓ of scutum length; notaulus inconspicuously im- pressed, extending to ⅓ of mesoscutum; parapsidal line conspicuous, long ( Fig. 5cView FIGURE 5). Scutellum slightly coriaceous, with fine, dense punctures that are 0–1 × diameters apart. Mesopleuron coarsely coriaceous, with fine, sparse punctures; scrobal sulcus inconspicuously impressed; episternal sulcus conspicuously crenate; omaulus absent ( Fig. 6cView FIGURE 6). Metapleuron shiny. Propodeal enclosure not delimited by carina, with conspicuous, irregular reticulation; posterior surface with irregular rugae mixed with dense, fine, transverse rugae ( Fig. 5gView FIGURE 5); lateral surface shiny anteriorly, nearly smooth, with inconspicuous, dense, oblique, longitudinal striation, remainder with fine, long, irregular, oblique longitudinal rugae.

Petiole slightly elongate, longer than wide, nearly 3 × as long as midocellar diameter ( Fig. 3cView FIGURE 3). Metasoma half mat, slightly coriaceous, with fine, dense punctures, sternum I without keel, sternum II deeply impressed basally; metasoma slightly constricted between segments I and II ( Fig. 6gView FIGURE 6).

Female. Body length 4.5–5.6 mm; mandible ivory except black margin; scape ivory beneath, above dark brown; mid tibia, and tarsi dark brown; hind leg black; setae on clypeus sparse, short and silvery ( Fig. 3aView FIGURE 3); HW: HLD: HLF = 74: 36: 62; HW: EWd: EW: TW: EL = 74: 16: 22: 21: 48; POD: OOD: OCD = 9: 13: 16; length of scape: length of pedicel: length of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 25: 8: 9: 4: 9: 5; metanotum slightly coriaceous, with fine, dense punctures; hypersternaulus conspicuously crenate; PL: PW: LTI: WTI = 15: 9: 42: 37.

Male. Body length 4.4– 5 mm; mandible ivory except reddish brown margin; scape beneath with a small yellowish spot basally, remainder dark brown; mid tibia, and tarsi reddish brown; hind leg dark brown; setae on clypeus dense, slightly elongate, silvery ( Fig. 3dView FIGURE 3); HW: HLD: HLF = 67: 34: 54; HW: EWd: EW: TW: EL = 67: 16: 24: 16: 43; POD: OOD: OCD = 8: 11: 12; length of scape: length of pedicel: length of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 18: 5: 7: 5: 8: 6; flagellomeres III–VIII beneath with linear ivory tyloids ( Fig. 3eView FIGURE 3); metanotum with tiny, sparse punctures; hypersternaulus shallow and short, inconspicuously crenulate; PL: PW: LTI: WTI = 11: 10: 43: 35; spinose tubercles absent on the hind margin of metasomal tergum VI mesally. Genitalia ( Fig. 3View FIGURE 3 f–h).

Distribution. China (Gansu, Shanxi).

Etymology. The name, tuberangustus  , is derived from the Latin stem tuber (= swelling) and angustus (= narrow), referring to the male flagellomeres III–VIII beneath with linear tyloids, which is one of the main recognition characters of this species.