Eugnoriste ptilosis, Kauschke, 2017

Kauschke, Ellen, 2017, New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part IV. Genera Eugnoriste Coquillett and Keilbachia Mohrig, Zootaxa 4319 (1), pp. 53-76 : 63

Eugnoriste ptilosis sp. n.

( FIg. 7 A–G; plate II, FIg. IV; plate IV, FIg. VIII)

Locus typicus: USA, ArIzona, CochISe County, Huachuca MountaInS , ASh Cyn Rd. , 31.39°N, 111.24°W.

Holotype: Male, 1.–11.XI.1993, oak-pIne woodland, MalaISe trap, leg. N. McFarland (PWMP).

Description. Male. Head. Elongate, hIgher than long. Eye brIdge 4 facetS wIde. 4th flagellomere wIth l/w IndeX of 2.0, wIth brown haIrS, Shorter than the dIameter. PalpuS 3-Segmented, Somewhat longer than the proboScIS; the fIrSt Segment wIth 6–7 brIStleS and very Short haIr-lIke SenSIllae. Labrum and proboScIS are elongate, aS long aS the head hIgh. Thorax. Dark brown; Scutum wIth Short brown haIrS, Some lateral and preScutellar brIStleS are longer. Scutellum wIth 2 Stronger brIStleS. PoSterIor pronotum bare. WIngS brownISh; R1 = 1/2 R; c Shorter 1/2 w; y = X, bare; M-fork aS long aS M-Stem, narrow; CuA-Stem dIStInct, = X; poSterIor veInS dIStInct, wIthout macrotrIchIa. Haltere Short and brown. LegS brown. Abdomen. The fIrSt SIX abdomInal tergIteS wIth SparSe and Short haIrS, the Seventh wIth a denSe cluSter of brIStleS In the mIddle of the dIStal border. The ventral baSe of the hypopygIum IS wIdely opened, wIthout lobe or denSe brIStleS; gonoStyluS thIck, weakly concaved In the apIcal half of the ventral SIde; wIth two Strong SpIneS, located SubapIcally and a whIplaSh haIr near the tIp. The 9th SternIte wIth two long lobeS (bIlobate). LobeS wIth Short haIrS on the Inner and the outer margInS. The tegmen IS wIder than long, wIth a dIStInct area of fIne teeth. The aedeaguS IS rather Short, wIth a large furca. Body length: 3 mm.

Comments. ThIS dark SpecIeS IS characterIzed by two SubapIcal SpIneS, located near the mIddle of the concave Inner SIde of gonoStyluS, dIfferent from all other known SpecIeS.

Distribution. USA (ArIzona).

Figures

FIGURE 7. Eugnoriste ptilosis sp. n. Male. Holotype. A. Hypopygium, ventral vieW. B. Gonostylus, ventral vieW (draWing, 400 X). C. ApeX of gonostylus With Whiplash-hair and the tWo subapiCal spines. D. 4 th flagellomere. E. Head. F. Abdominal tergites 3 – 6. G. C / W - indeX of the Wing apeX (draWing, 80 X).