Dasyproctus vietnamensis Pham 2022, sp. nov.
Creators: name: Pham, Phong Huy
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Crabronidae
Dasyproctus
Dasyproctus vietnamensis

description: 7. Dasyproctus vietnamensis Pham, sp. nov.
(Figs 49–61)
Material examined. Holotype, ♀, pinned (deposited in IEBR), VIETNAM: Ha Noi: Da Ton, Gia Lam, 5–15.xi.2001, Malaise trap, Coll. Mai Phu Quy [IEBR]. Paratypes (IEBR): VIETNAM: Vinh Phuc: 1 ♀, Me Linh Station for Biodiversity, Ngoc Thanh, Phuc Yen, 2.vi.2018, sweep net, Coll. Phong Huy Pham [IEBR]. Ha Noi: 1 ♂, Bai giua Song Hong, Long Bien, 16.viii.2012, sweep net, Coll. Hoa Thi Dang; 1 ♂, Hoa Lac, Thach That, 05–15.vii.2002, Malaise trap, Coll. Long Dang Khuat [IEBR]. Ninh Binh: 1 ♂, Thung Den Tran, Trang An, 23.vi.2017, sweep net, Coll. Phong Huy Pham [IEBR].
Diagnosis. The new species can be easily distinguished from its congeners by the following combination of characters: in females: head rectangular in frontal view; free margin of clypeus slightly indented medially; scape yellow with small black spot on inner lateral side; mandible yellow basally, reddish to black apically; IOC conspicuous; vertex with sparse, small punctures, and longitudinal, shallow pit near inner eye margin; anterior carina of pronotal collar laterally bending towards insertion of fore coxa; mesopleuron with yellow spot, scutellum with large yellow band medially; propodeum with Y-shaped furrow posteriorly; hind tibia yellow postero-dorsally except at apex, with hook-shaped carina postero-dorsally, and brown macula antero-dorsally; tarsomere 1 yellow basally; T1 immaculate; T2 with large, round depression at base; pygidial plate reddish brown, T5 and pygidial plate with brown-yellow setae. In males: IOC present; clypeus with median carina, free margin truncate medially; gena without striae; frons densely punctate; flagellomeres II‒IV cylindrical; mandible entirely black except small yellow spot at base; scutum distinctly sparsely punctate; axilla and two spots on scutellum yellow; T1 immaculate, longer than hind femur, and shorter than T2‒T4 combined, its sides not parallel; T2 with large, round depression at base; T2‒T5 largely, brightly yellow maculate; T6 with largely, brightly yellow band anteriorly. T2‒T7 impunctate.
The new species runs close to D. jungi Ma in the key to Asian and Oceanic Dasyproctus (Leclercq 2015) in having, in females: vertex with sparse, small punctures, and longitudinal pit near inner eye margin; gena sparsely punctate, with dense short silvery setae; mandible yellow basally; anterior carina of pronotal collar laterally bending towards insertion of fore coxa, medially parallel to anterior margin of scutum; scutum with dense, small punctures; pronotal collar distinctly notched medially; metanotum with longitudinal striae mixed with small punctures; tegula testaceous; propodeum with coarse, oblique rugae dorsally, arched striae laterally, Y-shaped furrow on posterior aspect; T1 immaculate; T2 with large, round depression at base; T2‒T4 with largely, brightly yellow maculae. In males: clypeal with free margin truncate medially; mandible sometimes with small yellow spot at base; IOC distinct; gena sparsely punctate; flagellomeres II‒IV cylindrical; pedicel and flagellum black; scutum with sparse, small punctures; dorsal surface of fore tibia yellow; T1 longer than hind femur; T2 with large, round depression at base. However, it differs from the latter in having, in females: head rectangular; flagellum I brownish; mandible reddish to black apically; vertex with longitudinal, shallow pit near inner eye margin; hind tibia yellow postero-dorsally except apex, with hook-shaped carina postero-dorsally, and brown macula antero-dorsally; all tarsi brown except tarsomere 1 yellow basally; T2 with shallow depression basally; pygidial plate reddish brown; T5 and pygidial plate with brown-yellow setae. In males: mandible entirely black excepting small yellow spot at base; scape except dorsal surface, pronotal collar, pronotal lobe, dorsal surface of fore tibia yellow, yellow band on dorsal surface of mid and hind tibiae medially; petiole dorsally 2.5 × as long as wide; T2 with shallow depression basally; T5 with brightly yellow maculae, T6 with largely, brightly yellow band anteriorly.
Description. Female, holotype (Figs 49‒54): Body length 8.5‒9.0 mm, forewing length 6.0‒ 6.3 mm.
Colour. Body black with following yellow parts: scape except small black spot on inner lateral side; mandible except reddish to black apically; pronotal collar; pronotal lobe; large spot on mesopleuron; axilla; large median band on scutellum; brightly yellow bimaculae on T2‒T5; small apical spot on fore femur; large ventral band on mid femur; ventral surface of fore and mid tibiae; hind tibia except apical part and large spot antero-dorsally; tarsomere 1 basally. Brown to black-brown are: flagellum I, tegula, pedicel, pygidial plate, ventral surface of all tibiae, and all tarsi except tarsomere 1 basally.
Head (Figs 49 & 52): In frontal view nearly rectangular, about 1.5 × as long as wide; mandible tridentate apically, with small tooth on inner margin; clypeus covered with dense silvery setae, slightly beveled, free margin slightly indented medially, blunt tooth on each side of free margin, longitudinal median carina reaching free margin; antennal sockets contiguous with one another and with inner eye margin; scape with two longitudinal, parallel carinae ventrally, length of scape 2.2 × distance between eyes at base of antennal socket; flagellum covered with thick short setae, flagellomere I as long as II, relative lengths of scape: pedicel: flagellomere I = 30: 5: 9; scapal basin with thick, adpressed silvery setae; IOC conspicuous; frons without furrow above IOC, densely punctate; OOD 1.18 × POD; vertex with sparse, small punctures, and well-imprinted supra-orbital fovea; frons and vertex covered with short brownish setae; gena sparsely punctate, with dense short silvery setae.
Mesosoma (Figs 50 & 53): Anterior carina of pronotal collar laterally bending towards insertion of fore coxa, medially parallel to anterior margin of scutum; pronotum conspicuously striate laterally; pronotal collar distinctly notched medially; scutum with dense, small punctures, and a series of short rugae posteriorly; scutellum and mesopleuron with sparse, fine, small punctures; metanotum with longitudinal striae mixed with small punctures; mesopleuron matt; metapleuron shining, with conspicuous, oblique rugae; propodeum with coarse, oblique rugae dorsally, arched striae laterally, Y-shaped furrow on posterior aspect. Mesosoma with white setae, sparse on scutum and denser on propodeum; hind tibia with hook-shaped carina postero-dorsally.
Metasoma (Figs 51 & 54): petiolate; T1 immaculate, with apical width about 2.6 × its basal width dorsally, length of T1 equal to that of hind femur, 1.4 × that of T2‒T4 combined; T2 with large, round depression at base; T1‒T5 with sparse, fine, small punctures; T2‒T5 with large maculae, these on T2 smaller than those on T3 and T4, these on T3 equal to those on T4; pygidial plate with coarse, dense punctures, conspicuously narrowed and gutterlike apically. Metasoma with whitish brown setae except T5 and pygidial plate with brown-yellow setae.
Male, paratype (Figs 55‒61): Body length 6.5‒7.0 mm, forewing length 4.5‒5.0 mm.
Structure as in female, but differing as follows:
Colour. Scape yellow except inner lateral sides; mandible black, sometimes with small yellow spot at base; scutellum black except small yellow spot antero-laterally; mesopleuron sometimes with small yellow spot; small yellow spot on fore femur apically; dorsal surface of fore tibia yellow; yellow band on dorsal surface of mid and hind tibiae medially; large spot on dorsal surface of hind tibia; tegula testaceous; ventral surface of all tibiae blackish brown; T7 and all tarsi dark brown.
Head (Figs 55 & 58): clypeus with free margin truncate medially; mandible bidentate apically; flagellomeres II‒IV cylindrical; frons densely, largely punctate, with shallow, narrow furrow above IOC.
Mesosoma (Figs 56 & 59): Anterior carina of pronotal collar laterally curving towards pronotal lobe; pronotum smooth anteriorly; scutum with sparse, small punctures; scutellum with conspicuous rugae; propodeal dorsum coarsely, largely reticulate.
Metasoma (Figs 57 & 61): petiolate; T1 longer than hind femur, shorter than T2‒T4 combined, its sides not parallel, 2.5 × as long as wide dorsally; T2‒T5 largely maculate, T6 with large yellow band anteriorly. T2‒T7 impunctate. Male genitalia as in Fig. 60.
Etymology. The specific name of this new species refers to its country of origin, Vietnam.
Distribution. Vietnam: Ha Noi and Vinh Phuc.
description: Published as part of Pham, Phong Huy, 2022, Taxonomic studies on Dasyproctus Lepeletier & Brullé (Hymenoptera: Crabronidae) from North Vietnam with description of two new species, pp. 43-54 in Zootaxa 5188 (1) on pages 50-53, DOI: 10.11646/zootaxa.5188.1.2, http://zenodo.org/record/7087337