Uirassubrillia, Mendes, Humberto Fonseca, Andersen, Trond & Pinho, Luiz Carlos, 2013

Mendes, Humberto Fonseca, Andersen, Trond & Pinho, Luiz Carlos, 2013, Uirassubrillia beckeri gen. n., sp. n. (Diptera: Chironomidae, Orthocladiinae) from northeastern Brazil, Zootaxa 3716 (1), pp. 65-74 : 68-69

Key to genera of the Brillia -group; male imagines

1. Gonostylus simple..................................................................................... 2

- Gonostylus bifurcate................................................................................... 4

2. Gonostylus without macroseta or other strong setae, subcosta bare. Japan, China..................... Neobrillia Kawai

- Gonostylus with long, apical macroseta and 2–3 strong preapical setae, subcosta with setae........................... 3

3. Fore tibia without spur, hind tibial comb present, wing not cuneiform, megaseta about half as long as gonostylus. Japan, China, Tanzania..................................................................... Tokyobrillia Kobayashi et Sasa

- Fore tibia with spur, hind tibial comb absent, wing cuneiform, megaseta about one-fourth as long as gonostylus. Neotropical region................................................................................. Irisobrillia Oliver

4. Wing membrane bare.................................................................................. 5

- Wing membrane setose.................................................................................. 6

5. With narrowly triangular anal point inserted subapically, with needle-like, pointed apex projecting beyond apex of tergite IX. Australia, Chile, Ecuador.............................................................. Austrobrillia Freeman

- True anal point absent, tergite IX with low, rounded hump with dense microtrichia and numerous setae. Nearctic and Palaearc- tic regions............................................................................. Plhudsonia Saether

6. Scutum extending well above antepronotum; hind tibial comb absent............................................ 7

- Scutum moderately or not extending above antepronotum; hind tibial comb present................................. 8

7. Gonostylus split at base, subapical and apical lobes of about same length, apical lobe with few short, scattered setae; sternapo- deme inverted U-shaped without projections or ridge. South Africa.................... Elpiscladius Harrison et Cranston

- Gonostylus split in basal one-third, subapical lobe shorter than apical lobe, apical lobe with stout apical lamelliform setae and long, subapical setae; sternapodeme inverted V-shaped, anteriomedian part with wide base tapering to truncated anterior mar- gin. Palaearctic region.............................................................. Eurycnemus van der Wulp

8. Apical lobe of gonostylus apically with macroseta or long, lamelliform setae; sternapodeme inverted V-shaped.......... 9

- Apical lobe of gonostylus apically with simple setae or megaseta; sternapodeme inverted U-shaped................... 10

9. Subapical lobe of gonostylus shorter than apical lobe; apical lobe with apical macroseta; sternapodeme with distinct oral pro- jections and short, narrow transverse sternapodeme. Brazil.................................... Uirassubrillia gen. n.

- Subapical lobe of gonostylus longer than apical lobe; apical lobe apically with long, lamelliform setae; sternapodeme with anteriomedian area triangular or rectangular. Nearctic and Palaearctic regions........................ Euryhapsis Oliver

10. Apical lobe of gonostylus with simple setae only; hind tarsomere 1 with sensilla chaetica. Nearctic, Palaearctic and Oriental regions and Oceania....................................................................... Brillia Kieffer

- Apical lobe of gonostylus with megaseta; hind tarsomere 1 without sensilla chaetica. Nearctic and Oriental regions................................................................................................ Xylotopus Oliver

Key to genera of the Brillia -group; female imagines1

1. With two seminal capsules.............................................................................. 2

- A third thin-walled seminal capsule present................................................................. 4

2. Hind tibial comb absent, wing cuneiform..................................................... Irisobrillia Oliver

- Hind tibial comb present, wing not cuneiform............................................................... 3

3. Tergite IX rectangular, undivided; subcosta setose................................................ Brillia Kieffer

- Tergite IX strongly divided; subcosta with at most a few setae.................................... Neobrillia Kawai

4. Wing membrane bare.................................................................................. 5

- Wing membrane setose................................................................................. 6

5. Antennae with 5 flagellomeres; gonapophysis VIII with line-like dorsomesal lobe and large ventrolateral lobe.................................................................................................. Plhudsonia Saether

- Antenna with 6 flagellomeres; gonapophysis VIII with strong, dorsomesal lobe and well separated, rectangular ventrolateral lobe............................................................................... Austrobrillia Freeman

6. Scutum extending well above antepronotum; hind tibial comb absent....................... Eurycnemus van der Wulp

- Scutum moderately or not extending above antepronotum; hind tibial comb present................................. 7

7. Antenna with 6 flagellomeres............................................................... Xylotopus Oliver

- Antenna with 5 flagellomeres............................................................................ 8

8. Fore tibia with spur...................................................................... Euryhapsis Oliver

- Fore tibia without spur................................................................................ 9

9. Subcosta setose............................................................... Tokyobrillia Kobayashi et Sasa

- Subcosta without setae................................................................ Uirassubrillia gen. n.

1The female of Elpiscladius is not known.