Dasyproctus hainanensis Yue & Li, 2021

Yue, Dan, Ma, Li & Li, Qiang, 2021, The genus Dasyproctus (Hymenoptera, Apoidea, Crabronidae) in China, with description of two new species, ZooKeys 1025, pp. 21-34 : 21

Dasyproctus hainanensis Yue & Li sp. nov. Figure 2a-g

Material examined.

Holotype. ♀, China: Hainan, 18°10'- 20°10'N, 108°37'- 111°05'E, 1934.VIII.2, coll. Qi He ( YNAU).

Diagnosis.

The new species clearly differs from the Oriental D. pentheri Leclercq by the following combination of characters: free margin of clypeus with a deep, triangular emargination medially, laterally with an angular tooth on each side (Fig. 2b ); propodeal enclosure with sparse, sturdy, longitudinal rugae; tibiae largely yellow (inner surface brown). In D. pentheri , the free margin of the clypeus has a deep semicircular emargination medially, the lateral area has a round tooth on each side; the propodeal enclosure has irregular, slender rugae; the tibiae are largely black.

The new species and D. pentheri can be distinguished from the other species of the genus by the following combination of characters: free margin of clypeus with a deep emargination medially, lateral area with a tooth on each side; anterior carina of pronotal collar laterally curving toward pronotal lobe; length of petiole no more than 2 × maximum width (Fig. 2f ).

Description.

Female (Fig. 2a ). Body length 7.8 mm. Black; yellow are: mandible (largely), two spots on clypeus medially, scape, pedicel, and flagellomere I subbasally, pronotal collar, pronotal lobe, prepectus (largely), scutellum, axilla, outer and inner sides of fore femur apically, apical half of mid femur, fore and mid tibiae, outer surface of hind tibia; fore coxa apically, inner sides of fore and mid trochanters, and tarsus pale yellowish; spots on gastral terga I-II laterally yellowish-brown, spots on terga III-IV laterally ferruginous, bands on tergum V and posterior margin of terga IV-V ferruginous (Fig. 2f, g ). Integument mostly with sparse, silvery setae; clypeus with dense appressed silvery setae; scapal basin (except frontal line) with short, dense, appressed, silvery setae; upper frons and vertex with sparse, pale brown setae; gena with short, somewhat dense, silvery setae; gastral terga largely with sparse, brown setae; gastral sterna II-V with long, somewhat sparse, brown setae; setae on sternum II irregular, setae on sterna III-V in nearly linear arrangement, sternum II laterally with oval setal spot; pygidial plate anterolaterally with long, brown setae.

Head. Mandible tridentate apically; median lobe of clypeus with mid carina, free margin with deep, triangular emargination medially, lateral area with an angular tooth on each side (Fig. 2b ); relative lengths of scape:pedicel:flagellum I:flagellum II:flagellum III = 35:7:8:9:6; frontal area dorsally with an inconspicuous, transverse carina at upper margin of scapal basin (Fig. 2c ); orbital fovea shiny, distinct, large, oval, length ca. 3 × width, widest area slightly narrower than hind ocellus diameter (Fig. 2c ); upper frons with line formed by punctures, and with somewhat dense, small to midsize punctures ca. 0.0-1.5 × diameters apart; gena with dense, fine punctures ca. 1-2 × diameters apart; vertex with somewhat dense, small punctures ca. 2 × diameters apart; vertex to anterior ocellus with extremely fine midline (Fig. 2c ). HL:HW:POD:OOD = 8:6:2:3.

Mesosoma. Anterior carina of pronotal collar laterally curving toward pronotal lobe (Fig. 2d ), pronotal collar with mid furrow (Fig. 2e ); scutum with somewhat dense, small punctures ca. 1-3 × diameters apart, posterior margin with sparse, small punctures ca. 2-5 × diameters apart and short, oblique rugae; axilla with sparse, shallow, midsize punctures ca. 0.0-1.5 × diameters apart; scutellum (middle area impunctate) with sparse, shallow, midsize punctures ca. 4.5-5.5 × diameters apart and short, longitudinal rugae posteriorly; posterior area shiny, alutaceous, and with dense, midsize punctures, precoxal sulcus with sparse, small punctures anteriorly, metanotum with coarse, longitudinal carinae mixed with sparse, coarse punctures; metapleuron with coarse, oblique rugae; propodeal enclosure with sparse, coarse, longitudinal rugae and mid furrow, lateral area with sparse, oblique rugae; posterior surface with dense, transverse rugae, and narrow, deep mid furrow; lateral surface with dense, fine, oblique rugae.

Metasoma. Length of petiole 1.22 × maximum width (Fig. 2f ), and half of hind femur, its surface rough, with contiguous large punctures; gastral terga I-IV with a yellowish-brown or ferruginous spot on each side, tergum V with a band, spots on tergum I slightest of all (Fig. 2g ); gastral terga with dense, fine punctures, gastral sterna with sparse, small to midsize punctures; pygidial plate concave and narrow, posteriorly with contiguous, small to midsize punctures and longitudinal rugae.

Male. Unknown.

Distribution.

China (Hainan).

Etymology.

The new species is named after the Hainan Province of China, where the holotype was collected .

Figures

Figure 2. Dasyproctus hainanensis Yue & Li, sp. nov., ♀ a habitus, lateral view b head, frontal view c head, dorsal view d collar, lateral view e mesosoma, dorsal view f petiole, gastral tergum I, dorsal view g gastral terga II-V, dorsal view. Scale bars: 0.68 mm (a); 0.89 mm (e, g); 0.99 mm (c); 1 mm (b); 1.31 mm (f); 1.65 mm (d).