Dasyproctus amplicarinalis Yue & Ma, 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 amplicarinalis Yue & Ma sp. nov. Figure 1a-g

Material examined.

Holotype. ♀, China: Yunnan: Dehong: Yingjiang: Yunyan Mountain , 24°69'N, 97°93'E, 2005.VIII.15, coll. Li Ma ( YNAU) ; Paratypes. 1♀, same place and date as holotype, coll. Kai Wu ( YNAU) ; 1♀, China: Yunnan: Nujiang: Lushui , 25°97'N, 98°82'E, 2006.VII.19, coll. Li Ma ( YNAU) .

Diagnosis.

The new species clearly differs from the Oriental D. buddha (Cameron) by the following combination of characters: frontal area dorsally with a high, lamellar, transverse carina at upper margin of scapal basin, carina interrupted by a broad and deep depression medially, and markedly high on each side of depression (Fig. 1c ); antennal scape (except above with two black spots medially) yellow, pedicel brown (Fig. 1b ); fore femur with one yellow spot; spots of tergum II larger than those of scutellum and tergum V (Fig. 1e, g ). In D. buddha : frontal area dorsally with a lamellar, transverse carina at upper margin of scapal basin, carina interrupted by a narrow and shallow depression medially, and slightly higher on each side of depression; scape and pedicel yellow; fore femur with two separated yellow spots; spots of tergum II smaller than those of scutellum and tergum V.

The new species and D. buddha can be distinguished from the other species of the genus by the following combination of characters: free margin of clypeus truncate, slightly emarginated medially, lateral area with a blunt tooth on each side; frontal area dorsally with a lamellar, transverse carina at upper margin of scapal basin, carina interrupted by depression medially; anterior carina of pronotal collar laterally not curving toward pronotal lobe; length of petiole more than 2 × maximum width.

Description.

Female (Fig. 1a ). Body length 9.5-11.0 mm. Black; mandible largely pale yellowish (Fig. 1b ); yellow are: scape (except above with two black spots) (Fig. 1b ), pronotal collar (except black depression medially), pronotal lobe, anterior corner of scutellum, axilla (Fig. 1e ), spot on ventral surface of fore femur subbasally, widely L-shaped band on mid femur ventrally (spot divided into two parts in some specimens), fore and mid tibiae ventrally and subapical 2/3 of hind tibia ventrally, spots on gastral terga II-V (Fig. 1g ). Integument mostly with sparse, silvery setae; upper frons mostly and vertex entirely with sparse, golden setae; upper frons near transverse carina and frontal line with denser, golden setae; gena with short, dense, silvery appressed setae; scapal basin (except frontal line) with short, dense, golden setae; clypeus with dense, appressed, silvery setae; scape with white setae apically; lateral surface of mesosoma with dense, golden setae; gastral terga I-V with sparse, brown setae; sternum II with silvery setae and a nearly round setal spot laterally; posterior margin of sterna II-V with long, sparse, brown setae; tergum V laterally and pygidial plate basally and laterally with long, brown setae.

Head. Mandible tridentate apically, inner side of mandible produced subapically; free margin of clypeus truncate, slightly emarginated medially, lateral area with a blunt tooth on each side (Fig. 1b ); relative lengths of scape:pedicel:flagellum I:flagellum II:flagellum III = 100:18:29:22:20; frontal area dorsally with a high, lamellar, transverse carina at upper margin of scapal basin, carina interrupted by a broad and deep depression medially, and markedly high on each side of depression (Fig. 1c ); orbital fovea shiny, oval, distinct, and large, length ca. 3 × width, widest area slightly broader than hind ocellus diameter (Fig. 1c ); upper frons with line formed by punctures (Fig. 1c ), and with dense, small punctures 0.0-0.5 × diameters apart; vertex with dense, small punctures ca. 1.5-2.0 × diameters apart; gena with small punctures ca. 2-5 × diameters apart; vertex to anterior ocellus with extremely fine midline (Fig. 1c ). HL:HW:POD:OOD = 40:67:11:13.

Mesosoma. Anterior carina of pronotal collar curving backwards in middle, laterally not curving toward pronotal lobe, nearly parallel to anterior margin of scutum, extending to insertion of fore coxa (Fig. 1d ); pronotal collar with mid furrow (Fig. 1e ); scutum with dense, midsize punctures ca. 1.0-1.5 × diameters apart, and short, longitudinal rugae posteriorly; scutellum with dense, shallow, midsize punctures ca. 3-4 × diameters apart and short, oblique longitudinal rugae posteriorly; mesopleuron with dense, shallow, midsize punctures ca. 1-4 × diameters apart; metanotum with longitudinal rugae mixed with dense, midsize punctures ca. 0.8-1.0 × diameters apart; metapleuron with coarse, oblique rugae; propodeal enclosure with oblique rugae and mid furrow; posterior surface with oblique rugae and mid furrow; lateral surface with dense, oblique rugae; outer margin of fore tarsomere I with three spines subbasally.

Metasoma. Length of petiole 2.27 × maximum width (Fig. 1g ), and ca. half of hind femur, its surface with dense, midsize punctures ca. 1.5-2.0 × diameters apart; terga with dense, fine punctures; sternum II with dense, small punctures; sterna III-VI posteriorly with dense, small to midsize punctures; terga II-V with yellow spot on each side, spots on terga III-IV larger than those of terga II and V, and spots on tergum II larger than those of tergum V (Fig. 1g ); spots on tergum II larger than those of scutellum, but shorter than half of those of tergum III (Fig. 1e, g ). Pygidial plate concave and narrow, with sparse, small to midsize punctures anteriorly, and with contiguous, midsize punctures and longitudinal rugae posteriorly.

Male. Unknown.

Distribution.

China (Yunnan).

Etymology.

The species’ name, amplicarinalis, is derived from the Latin stem ampl - (= large, spacious, roomy) and the Latin word carinalis, referring to the high, lamellar, transverse carina at the upper margin of the scapal basin, which is one of the main diagnostic characters of this species.

Figures

Figure 1. Dasyproctus amplicarinalis Yue & Ma, sp. nov., ♀. a habitus, dorsal view b head, frontal view c head, dorsal view d collar, lateral view e mesosoma, dorsal view f fore tarsomere I, dorsal view g metasoma, dorsal view. Scale bars: 0.43 mm (e); 0.49 mm (a); 0.57 mm (g); 1 mm (b, c); 1.31 mm (f); 1.48 mm (d).