Micromus setulosus, Zhao, Yang, Tian, Yanlin & Liu, Zhiqi, 2014

Zhao, Yang, Tian, Yanlin & Liu, Zhiqi, 2014, New data on the genus Micromus Rambur, 1842 from China (Neuroptera, Hemerobiidae), with a key to Chinese species, Zootaxa 3846 (1), pp. 127-137 : 129-132

Micromus setulosus sp. nov.

( Figs. 1 , 4–9 )

Diagnosis. This species is characterized by the veins which are densely covered with stout setae in forewing, the greyish stripes along the outer gradate series and subcostal veinlet present; CuA simple and not fused with MP, just linked by a short crossvein; three gradate series present in forewing and hind wing. Male: posteroventral edge of ectoproct extended upwards as a spine and densely covered with small spines from base to middle; basal mediuncus of gonarcus densely covered with small spines on the surface and distally rounded; terminal lobe of parabaculum separated from two third distal.

Measurements. Forewing length 8.1 mm, width 2.8 mm. Hind wing length 7.0 mm, width 2.4 mm. Body length 5.2 mm.

Description. Head. Yellowish-brown. Eyes big and dark brown. Antenna amber, with more than fifty segments, covered with pale yellowish-brown setae. Frontogenal costa, frontoclypeal costa and pleurostomal costa obviously brown, frontogenal costa especially slender, nearly reached the antennal socket. Labial palpus 3- segmented and maxillary palpus 5-segmented, pale yellowish-brown. Areas between and behind antennae densely covered with yellowish-brown stout setae and with sparse brown setae in the hind margin of head.

Thorax. Yellowish-brown. Pronotum and mesonotum densely covered with brown short setae, metanotum with less setae where dark colored. Legs yellowish-brown, with two brown spots on tibiae.

Wings ( Fig. 1 ). Forewing narrow, pale yellowish-brown, hyaline with pale brown stripes along the gradate series. Margins and veins densely covered with brown stout setae; veins yellowish-brown, dark colored in the crossveins of gradate series. Subcostal veinlet with 7–8 costal crossveins. Anterior radial trace bearing 6–7 ORB’s; ORB1 and ORB2 originally fused. M forked behind the origin of ORB1 from R vein, MA simple and MP forked into two branches before inner gradate series. CuA simple and not fused with MP, just linked by a short crossvein. Three gradate series, inner gradate series 4 crossveins; middle 6–7 and outer 9. Hind wing pale yellowish-brown, hyaline and immaculate. Veins yellowish-brown, only parts of middle and outer gradate series a little darker. Rs with 6 branches. M proximally forked into 2 branches. Cu simple and CuA not fused with MP. Three gradate series, inner gradate series 3–4 crossveins; middle 6–7 and outer 9–10.

Male terminalia ( Fig. 4 ). 8th tergite small, hind margin longer than lateral margin from lateral view; 8th sternite broad, hind margin shorter than lateral margin. 9th tergite fused with ectoproct, protruding dorsally; posteroventral edge of ectoproct extended upwards as a spine, exceeding the hind margin of ectoproct but shorter than the 9th sternite, densely covered with small spines from the base to middle. 9th sternite developed and hairy. Extrahemigonarcus of gonarcus ( Fig. 5–6 ) developed, tapered distally and approximately slender triangle from dorsal view with membrane in center; mediucus covered with small spines from basal to middle, broadened basally and bend downwards from middle, tapering, with a blunt hooked end. Terminal lobe of parabaculum ( Fig. 7–8 ) separated from two third distal, and with a small upward hook in the end. Hypandrium internum ( Fig. 9 ) slightly convex in apex, with both sides slightly rolled downwards.

Distribution. China (Ningxia)

Material examined. Holotype, 1♂, CHINA: Ningxia province, Guyuan city, Jingyuan county, Yehe valley. 8.viii.2012, Yang Zhao ( CAU).

Etymology. The specific name refers to the characteristic hairy forewing and the thorax densely covered with brown short setae in pronotum and mesonotum.

Remarks. This new species seems related to M. yunnanus based on the present of subcostal veinlet; however, it can be distinguished from M. yunnanus by the greyish stripes along the outer gradate series without brown spots in forewing, and by the basal mediuncus densely covered with small spines on the surface and distally rounded in male terminalia.

Figures

FIGURES 1 – 3. Wings. 1. Micromus. setulosus sp. nov. 2. Micromus perelegans Tjeder, 1936. 3. Micromus. pallidius (Yang, 1987).

FIGURES 4 – 9. Micromus. setulosus sp. nov. 4. Male terminalia, lateral view [A]; 5. Gonarcus, lateral view [B]; 6. Ditto, dorsal view [B]; 7. Parabaculum, lateral view [B]; 8. Ditto, dorsal view [B]; 9. Hypandrium internum, ventral view [B]. Scale bars (mm): A = 0.5; B = 0.5.