Metalimnobia (Metalimnobia) rectangularis, Mao, Meng & Yang, Ding, 2010

Mao, Meng & Yang, Ding, 2010, Species of the genus Metalimnobia Matsumura from China (Diptera, Limoniidae), Zootaxa 2344, pp. 1-16 : 10

Metalimnobia (Metalimnobia) rectangularis sp. nov.

( Figs. 5 , 24–27 )

Diagnosis. Pleura black except metanepisternum brownish yellow. Femora brownish yellow with two black rings, first indistinct, at 4/5 length of femora, second at tip, narrower than subapical yellow ring. Wing brownish, microtomentose; Sc1 shorter than Sc2, terminal section of R1 subequal to R 2 in length. Paramere with stem straight, tip broad and curved inwards in right angle, with some short hairs.

Description. Male. Body length 15.5 mm, wing 17.5 mm.

Head. Brownish black with pale gray pollen. One small median tubercle between eyes. Hairs on head black. Antenna 3.0 mm. Scape blackish brown, pedicel brown, flagellomeres brown, suboval to subcylindrical, apical segments elongate, verticils considerably longer than segments. Proboscis and palpus blackish brown with black hairs.

Thorax. General blackish brown with pale gray pollen. Pronotum blackish brown. Prescutum brown with four black stripes, median pair long and slender, lateral pair short and broad. Scutum blackish brown except lobes black. Scutellum black except median area brownish yellow. Mediotergite black on anterior half, gradually brown on posterior half. Pleura black except metanepisternum brownish yellow. Hairs on thorax brown. Coxae and trochanters brown; femora brownish yellow with two black rings, first indistinct, at 4/5 length of femora, second at tip, narrower than subapical yellow ring; tibiae brownish yellow with tip brown; tarsi brownish yellow. Hairs on legs black.

Wing ( Fig. 5 ) brownish, microtomentose, and with dark brown spots at base of cell R, origin and fork of Rs and each side of stigma; seams along crossveins r-m, m-m, m-cu and basal sections of cells M1+2 and M3; obscure brownish irregular clouds in all marginal cells, arranged in transverse band before apex of wing; stigma yellowish. Sc1 shorter than Sc2, terminal section of R1 subequal to R 2 in length, m-cu before fork of M. Halter 2.5 mm long, brownish yellow except base of knob brown.

Abdomen. Tergites 1–5 yellowish brown except posterior margin black; tergites 6–8 black, tergite 9 yellowish brown. Sternites 1–5 yellowish brown with lateral and posterior margin black, sternites 6–9 black. Hairs on abdomen brown.

Hypopygium ( Figs. 24–27 ). Posterior margin of tergite 9 ( Fig. 24 ) emarginate, each lobe with several hairs. Gonocoxite with broad ventromesal lobe. Outer gonostylus ( Fig. 25 ) arched, gradually narrowing to apex. Inner gonostylus ( Fig. 25 ) divided into three lobes, innermost lobe long and slender, with short hairs at inner margin; dorsal fleshy lobe subteres with long hairs, longer than 1/2 length of innermost one; ventral fleshy lobe small and subglobular, with long hairs. Paramere ( Fig. 26 ) with stem straight, tip broad and curved inwards in right angle, with some short hairs.

Female. Body length 13.0 mm, wing 13.8 mm. Similar to male.

Type material. Holotype male, Heilongjiang: Ning’an, Underground forest (900 m), 44°11΄45ʺN 128°32΄0 4ʺE, 1985. VIII. 16, Ke Luo. Paratype 1 female, same data as holotype.

Distribution. China (Heilongjiang).

Etymology. The specific name refers to the curved tip of the paramere.

Remarks. This new species is somewhat similar to M. quadrimaculata ( Linnaeus, 1760) in having the similar patterning of the wing, but it can be separated from the latter by the wing microtomentose, Sc1 shorter than Sc2, tip of the paramere curved inwards in right angle. In M. quadrimaculata , the wing is not microtomentose, Sc1 is longer than Sc2, and the tip of the paramere is cuspidate.

Figures

FIGURES 1 – 7. Wing (male). 1. Metalimnobia (Metalimnobia) bifasciata (Schrank, 1781); 2. Metalimnobia (Metalimnobia) yunnanica (Edwards, 1928); 3. Metalimnobia (Metalimnobia) quadrimaculata (Linnaeus, 1760); 4. Metalimnobia (Metalimnobia) impubis sp. nov; 5. Metalimnobia (Metalimnobia) rectangularis sp. nov.; 6. Metalimnobia (Metalimnobia) quadrinotata (Meigen, 1818); 7. Metalimnobia (Metalimnobia) tenua Savchenko, 1976.

FIGURES 24 – 27. Metalimnobia (Metalimnobia) rectangularis sp. nov. Male. 24. Ninth tergite, dorsal view; 25. gonostylus, dorsal view; 26. hypopygium, dorsal view; 27. hypopygium, ventral view.