Scatopsciara

Mohrig, Werner & Kauschke, Ellen, 2016, New Black Fungus Gnats (Diptera, Sciaridae) of North America Part I. Genus Scatopsciara Edwards, 1927, Zootaxa 4150 (4), pp. 401-435 : 403

Key A (Subgenus Scatopsciara s. str.)

1 Gonostylus with 3–4 spines above and 6–7 below the apical tooth........... Scatopsciara acuta (Johannsen) ( Figs. 8 C–E)

- Gonostylus without spines above the apical tooth............................................................2

2 Gonostylus with subapical spines around the base of apical tooth only............................................ 3

- Gonostylus with subapical spines on virtually whole inner side.................................................6

3 Gonostylus long and slender, not curved in the apical third; 4th flagellomere short, l/w index 1.5; c distinctly shorter than ½ w........................................................................ Sc. tricuspidatula sp. n. ( Fig. 7 A–B )

- Gonostylus short, curved in the apical third; 4th flagellomere long, l/w index greater than 2.0; c ½ w or longer............4

4 Gonostylus slightly curved in the apical half, with 4 subapical spines; flagellomeres haired weakly, with some stronger bristle- like hairs............................................................. Sc. atomaria (Zetterstedt) , ( Fig. 7 C–D)

- Gonostylus curved strongly in the apical half, mostly with at most 2–3 subapical spines; flagellomeres haired uniformly, with- out unusual bristle-like hairs............................................................................. 5

5 Gonostylus slender, with 3 subapical spines; 4th flagellomere with l/w index of 2.0; coxae brownish............................................................................ Sc. curviforceps (Bukowski & Lengersdorf) , ( Fig. 3 A–C)

- Gonostylus strong and broad basely, with 2 subapical spines; 4th flagellomere with l/w index of 2.4; coxae yellowish.................................................................................. Sc. subgrossa sp. n. ( Fig. 6 A–C )

6 Apical tooth shorter than subapical spines.................................................................. 7

- Apical tooth as long or longer than subapical spines..........................................................8

7 Gonocoxites haired, rather short and not unusually dense on the ventral inner side; inner side of gonostylus with 6–8 spines............................................................................. Sc. awinitae sp. n. ( Fig. 1 A–C)

- Gonocoxites with long and dense bristles on ventral inner side in the apical half; inner side of gonostylus with many spines (12–16) in the apical half................................................ Sc. subciliata Tuomikoski , ( Fig. 5 D–F)

8 Gonostylus short and compact, not pointed or tapering to apex.................................................. 9

- Gonostylus pointed or tapering to apex.................................................................... 10

9 Gonostylus small and oval; apical tooth strong and directed forwards, subapical spines (approximately 10) fine..................................................................................... Sc. vitripennis (Meigen) , ( Fig. 8 B)

- Gonostylus larger and dorsally flattened in the apical half; apical tooth directed downwards; subapical spines (7–8) strong............................................................................... Sc. nana (Winnertz) , ( Fig. 8 A )

10 Gonostylus with a dense row of spines on rather stout bases in the middle of the inner side..................................................................................................... Sc. dendrotica Steffan ( Fig. 5 A–C )

- Gonostylus with spines on small bases in the middle of the inner side........................................... 11

11 Gonostylus with more than 6 spines on the inner side................................. Sc. catoriae sp. n. ( Fig. 2 A–B )

- Gonostylus with 4–6 long hyaline spines on the inner side.................................................... 12

12 Gonostylus curved apically and concaved on the dorsal side; with a strong tooth, longer than subapical spines...................................................................................... Sc. geophila Tuomikoski ( Fig. 4 A )

- Gonostylus neither distinctly curved nor concaved on the dorsal side; tooth as long as subapical spines................ 13

13 Subapical spines long, hyaline, arranged in an irregular row, with one spine above the apical tooth; tegmen flat................................................................................ Sc. neglecta Menzel & Mohrig ( Fig. 4 B)

- Subapical spines shorter, brown, arranged in a regular row of 7 spines below the apical tooth; tegmen not flat...................................................................................... Sc. subdendrotica sp. n. ( Fig. 2 C)

Figures

FIGURE 1. Scatopsciara (Sc.) awinitae sp. n. Holotype. A. Part of hypopygium, ventral view. B. Apical half of gonostylus, ventral view. C. 4 th flagellomere.

FIGURE 3. Scatopsciara (Sc.) curviforceps (Bukowski & Lengersdorf). Specimen from N. Y. City. A. Hypopygium, ventral view. B. Flagellomeres 4 – 5. C. Wing.

FIGURE 8. A. Scatopsciara (Sc.) nana (Winnertz). European specimen. Part of hypopygium. B. Scatopsciara (Sc.) vitripennis (Meigen). Specimen from USA (Alaska). Part of hypopygium. C – E. Scatopsciara (Sc.) acuta (Johannsen). Specimen from Russia (Siberia). C. Hypopygium, ventral view. D. 4 th flagellomere. E. Apex of fore tibia.

FIGURE 7. A – B. Scatopsciara (Sc.) tricuspidatula sp. n. Holotype. A. Hypopygium, ventral view. B. Flagellomeres 4 – 5. C – D. Scatopsciara (Sc.) atomaria (Zetterstedt). Specimen from USA. C. Hypopygium, ventral view. D. Flagellomeres 3 – 5.

FIGURE 6. A – C. Scatopsciara (S c.) subgrossa sp. n. Holotype. A. Hypopygium, ventral view. B. Flagellomeres 3 – 4. C. Apex of fore tibia.

FIGURE 5. A – C. Scatopsciara (Sc.) dendrotica Steffan. A. Hypopygium, ventral view. B. 4 th flagellomere. C. Apex of fore tibia. D – F. Scatopsciara (Sc.) subciliata Tuomikoski. Specimen from Canada. D. Gonostylus, ventral view. E. Part of hypopygium, ventral view. F. Wing and haltere.

FIGURE 2. A – B. Scatopsciara (Sc.) catoriae sp. n. Holotype. A. Gonostylus, ventral view. B. Flagellomeres 4 – 5. C. Scatopsciara (Sc.) subdendrotica sp. n. Holotype. Hypopygium, ventral view.

FIGURE 4. A. Scatopsciara (Sc.) geophila Tuomikoski. Specimen from Canada. Hypopygium, ventral view. B. Scatopsciara (Sc.) neglecta Menzel & Mohrig. Specimen from Canada. Hypopygium, ventral view.