Panorpa davidi Navas , 1908

Li, Ning, Wang, Ji-Shen & Hua, Bao-Zhen, 2021, Morphological phylogenetic analyses and taxonomic revision of the Panorpa davidi group (Mecoptera: Panorpidae), Arthropod Systematics & amp; Phylogeny 79, pp. 309-342 : 309

Panorpa davidi Navas, 1908

Fig. 5

Panorpa davidi Navás, 1908: 415, fig. 19. Type locality: "Mou-Pin, Tibet" [now Baoxing, Sichuan], China; Esben-Petersen, 1921: 29, figs 21-23; Cheng, 1957: 25, fig. 57; Rust & Byes, 1976: 84, fig. 156; Wang & Hua, 2018: 325, figs 5-114-1-5-114-2.

Diagnosis.

This species can be readily recognized by the following characters: (1) forewing markings well-developed, apical band broad and scattered posteriorly; pterostigmal band with basal branch complete and apical branch separated or absent; basal band split into two spots; basal spot greatly reduced (Fig. 5A-B ); (2) meso- and metanotum black, with narrower pale yellow mesal stripe (Fig. 5A-C ); in males, (3) gonocoxites with protruding process bearing short black setae on inner apex (Fig. 5E ); (4) parameres elongate, crossed mesally, and twisted in S-shape (Fig. 5E ); and in females (5) medigynium with main plate oblong, three times as long as wide; axis extending beyond main plate for half its length anteriorly (Fig. 5G ).

Material examined.

CHINA - Sichuan Prov. • 1♀; Baoxing, Qingyi River Source ; 2500 m a.s.l.; 13 Aug. 2018; Ji-Shen Wang leg. • 1♂, 2♀♀, collecting data missing.

Measurements.

Male: FL = 13.0 mm, FW = 3.0 mm; HL = 11.5 mm, HW = 2.9 mm. Female: FL = 13.0-14.0 mm, FW = 3.0-3.2 mm; HL = 11.6-12.5 mm, HW = 3.0-3.1 mm.

Description.

Female: Head (Fig. 5B-C ): Frons yellowish brown, occiput yellowish brown with two black spots laterally. Vertex with broad black transverse stripe passing through ocellar triangle and extending to inner margins of compound eyes. Rostrum yellow, slender. Maxillary and labial palps mostly pale brown, with distal segments black brown. Antennal scape yellowish brown; pedicel dark brown; flagellum black, filiform. Thorax (Fig. 5 B-C ): Pronotum black, with 12-16 setae along anterior margin. Meso- and metanotum black, with narrower pale yellow mesal stripe; scutella totally pale yellow. Pleura and legs light yellowish brown, with distal tarsomere blackish. Wings (Fig. 5B ): Wing membrane hyaline, with dark brown markings. In forewing, apical band broad and scattered posteriorly; pterostigmal band with broad basal branch, apical branch absent or reduced to small spot posteriorly; marginal spot absent or reduced to small spot; basal band split into two spots; basal spot greatly reduced on base of CuA and CuP. Hindwing similar to forewing, with relatively reduced markings; basal spot absent. Abdomen (Fig. 5B ): T2-T6 black. A7-A10 brown. Genitalia (Fig. 5F-G ): Subgenital plate elliptical, with V-shaped distal emargination, bearing long setae on distal part. Medigynium with oblong main plate, three times as long as wide, and lateral margin emarginate at basal one-third; paired posterior arms quarter as long as main plate, forming broad U-shaped emargination; axis slightly extruded posteriorly, extending beyond main plate for half of its length anteriorly.

Distribution.

China: Sichuan.

Remarks.

Only a single male (holotype) of P. davidi from Baoxing, Sichuan was known previously. A female specimen was erroneously treated as P. davidi by Navás (1908), but was later designated as the holotype of P. guttata Navás, 1908 (Esben-Petersen 1915). A female of P. davidi captured recently from the type locality can be differentiated from that of P. guttata by the well-developed (cf. greatly reduced) wing markings and by meso- and metanotum black (cf. yellowish brown), with a narrower (cf. broad) pale yellow mesal stripe.

Figures

Figure 5. Panorpa davidi Navas, 1908 from Baoxing, Sichuan. A, D - E. Male. A. Habitus, dorsal view. D - E. Genital bulb, dorsal and ventral views. B - C, F - G. Female. B. Habitus, dorsal view. C. Dorsum, dorsal view. F. Subgenital plate, ventral view. G. Medigynium, ventral view. Scale bars: A-B = 5 mm; C = 2 mm; D-G = 0.2 mm.