Passaloecus tuberculiformis Bashir & Ma, 2019

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 : 435-437

4. Passaloecus tuberculiformis Bashir & Ma , sp. n.

( Figures 4 ; 5d, h ; 6d, h ; 7g )

Material examined. Holotype: ♂, China: Heilongjiang: Yichun , 47°43’N, 128°53’E, 1985, No. 850205, coll. Jin Liyuan ( ZU) . Paratypes: 2♂♂, same data as holotype .

Diagnosis. The male of new species is similar to P. mongolicus Tsuneki, 1972 in having the following: mandible bidentate apically; free margin of clypeus slightly produced medially, nearly truncate apically; frontal median carina lacking; interantennal tubercle short; ocellar triangle slightly convex; occipital carina narrowed throughout, crenulate ventrally; pronotal collar without anterior carina; scutal patches absent; admedian line conspicuous, extending to ⅓ of mesoscutum length; notaulus inconspicuously impressed; metanotum slightly coriaceous, with fine, dense, punctures; hypersternaulus and episternal sulcus conspicuously, broadly crenate; omaulus absent; metapleuron shiny; petiole short, nearly 1 × as long as midocellar diameter.

It can be distinguished from P. mongolicus Tsuneki by the following characters: flagellomeres II–VIII beneath with long tyloids; labrum triangular, not constricted subapically; vertex behind ocelli with midsize, dense punctures; spinose tubercles present on the hind margin of metasomal tergum VI mesally; eye with inner margin slightly emarginate. In P. mongolicus Tsuneki flagellomeres III–X beneath with smooth, short tyloids; labrum triangular, constricted subapically; vertex behind ocelli with large, dense punctures; spinose tubercles absent on the hind margin of metasomal tergum VI mesally; eye with inner margin convex, or very shallowly sinuate.

Description. Male. Body length 4.5 mm. Black; apex of mandible reddish brown, basal ⅓ of outer margin black, rest ivory to yellowish; labrum, palpi, and pronotal lobe ivory to yellowish; scape beneath ivory to yellowish, remainder dark brown to black; pedicel, tegula, and flagellum dark brown; forewing veins fulvous. Fore leg: outer margin of femur, tibia, and tarsi fulvous, trochanter and remainder femur dark brown; mid leg: apex of femur, tibia, and tarsi fulvous, rest of femur and trochanter dark brown; hind leg: basal one fourth of tibia yellowish, rest dark brown except coxa black; petiole, and metasoma black, apical segment dark brown; setae on clypeus dense, slightly elongate, silvery.

Mandible bidentate apically ( Fig. 4a ). Labrum triangular, not constricted subapically. Clypeus flat, with midsize, dense punctures; free margin of clypeus slightly produced medially, nearly truncate apically ( Fig. 4a ). Lower frons coarsely coriaceous, frontal median carina lacking; interantennal tubercle short ( Fig. 4a ); middle and upper frons markedly coriaceous, and with large, dense, punctures; ocellar triangle slightly convex, coarsely coriaceous, with large dense punctures. Vertex behind ocelli with midsize, dense, punctures and dense, fine, transverse striation, coarsely coriaceous, slightly convex ( Fig. 4b ). Gena coarsely coriaceous, with fine, dense punctures dorsally, and fine, sparse, punctures ventrally. Occipital carina narrowed throughout, crenulate ventrally. HW: HLD: HLF = 69: 35: 57; HW: EWd: EW: TW: EL = 69: 15: 22: 16: 45; POD: OOD: OCD = 11: 11: 16; length of scape: length of pedicel: length of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 17: 8: 9: 6: 10: 6. Flagellomeres II–VIII beneath with broad, long tyloids ( Fig. 4c ).

Pronotal collar without anterior carina or anterolateral angle. Mesoscutum coarsely coriaceous, with large, dense punctures that are 0–1 × diameters apart, and sparse, conspicuous, short, longitudinal rugae posteriorly; scutal patches absent; admedian line conspicuous, extending to ⅓ of mesoscutum length; notaulus inconspicuously impressed, extending to ⅓ of mesoscutum length; parapsidal line impressed, long ( Fig. 5d ); scutellum slightly coriaceous, with midsize, dense, punctures that are 0–1 × diameters apart. Metanotum slightly coriaceous, with fine, dense, punctures. Mesopleuron coarsely coriaceous, with midsize, sparse, punctures, posteriorly with very short, sparse, longitudinal rugae; scrobal sulcus inconspicuously impressed; hypersternaulus and episternal sulcus conspicuously, broadly crenate; omaulus absent ( Fig. 6d ). Metapleuron shiny. Propodeal enclosure not delimited by carina, with well-defined, irregular, reticulation; posterior surface with well-defined reticulation ( Fig. 5h ); lateral surface anteriorly shiny, nearly smooth, with inconspicuous, dense, oblique, longitudinal striation, remaining area with well-defined reticulation.

Petiole short, nearly 1 × as long as midocellar diameter ( Fig. 4d ); PL: PW: LTI: WTI = 5: 8: 39: 36. Metasoma half mat, slightly coriaceous, with fine to midsize, dense punctures; sternum I with a well-defined longitudinal keel medially, reaching half of sternum I; sternum II deeply impressed basally; metasoma slightly constricted between segments I and II; spinose tubercles present on the hind margin of metasomal tergum VI mesally ( Fig. 6h ). Genitalia ( Fig. 4 e–g).

Female. unknown.

Distribution. China (Heilongjiang).

Etymology. The name, tuberculiformis , is derived from the Latin word, tuberculum (= a tubercle) and the Latin suffix formis (= in the form of), referring to the metasomal tergum VI of male with spinose tubercles on the hind margin, which is one of the main recognition characters of this species.

Figures

FIGURE 4. Passaloecus tuberculiformis Bashir & Ma, sp. n. (male). a Frontal view of head; b Dorsal view of head; c Antennal segments I-XIII; d Dorsal view of metasomal tergum I; e Dorsal view of genitalia; f Lateral view of genitalia; g Ventral view of genitalia. Scale bars: a, c, d=1 mm; b=1.25 mm; e–g=1.63 mm.

FIGURE 5. a & e. Passaloecus bisulcatus Bashir & Ma, sp. n. (female). b & f. Passaloecus profundesulcatus Bashir & Ma, sp. n. (female). c & g. Passaloecus tuberangustus Bashir & Ma, sp. n. (female). d & h. Passaloecus tuberculiformis Bashir & Ma, sp. n. (male). a-d mesoscutum; e–h Dorsal view of propodeum. Scale bars: a–h=1 mm.

FIGURE 6. a & e. Passaloecus bisulcatus Bashir & Ma, sp. n. (female). b & f. Passaloecus profundesulcatus Bashir & Ma, sp. n. (female). c & g. Passaloecus tuberangustus Bashir & Ma, sp. n. (Female). d & h. Passaloecus tuberculiformis Bashir & Ma, sp. n. (male). a–d Lateral view of thorax; e–h Dorsal view of metasoma; Scale bars: a–h=1 mm.

FIGURE 7. a & b. Passaloecus bisulcatus Bashir & Ma, sp. n. (a female, b male). c & d. Passaloecus profundesulcatus Bashir & Ma, sp. n. (c female, d male). e & f. Passaloecus tuberangustus Bashir & Ma, sp. n. (e female, f male). g. Passaloecus tuberculiformis Bashir & Ma, sp. n. (male). h. Passaloecus turanicus Gussakovskij (female). i. Passaloecus turionum Dahlbom (female). a–i dorsal view. Scale bars: a–i=1 mm.