Dasyproctus hainanensis Yue & Li, 2021

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

Material examined.

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

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 View Figure 2 ); 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 View Figure 2 ).

Description.

Female (Fig. 2a View Figure 2 ). 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 View Figure 2 ). 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 View Figure 2 ); 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 View Figure 2 ); orbital fovea shiny, distinct, large, oval, length ca. 3 × width, widest area slightly narrower than hind ocellus diameter (Fig. 2c View Figure 2 ); 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 View Figure 2 ). HL:HW:POD:OOD = 8:6:2:3.

Mesosoma. Anterior carina of pronotal collar laterally curving toward pronotal lobe (Fig. 2d View Figure 2 ), pronotal collar with mid furrow (Fig. 2e View Figure 2 ); 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 View Figure 2 ), 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 View Figure 2 ); 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 .