Onconeura Andersen et Saether

Wiedenbrug, Sofia, Mendes, Humberto F., Pepinelli, Mateus & Trivinho-Strixino, Susana, 2009, Review of the genus Onconeura Andersen et Saether (Diptera: Chironomidae), with the description of four new species from Brazil, Zootaxa 2265, pp. 1-26 : 23

Key to known pupae of Onconeura Andersen et Saether

1. Fringe of anal lobe much shorter as anal lobe length .................................................................................................. 2

- Fringe of anal lobe with at least some taeniate seta subequal or longer as anal lobe length ....................................... 4

2. Frontal apotome keel shaped ( Fig. 9 A); L2 -seta never as long as half of segment length ......... Onconeura sp. “hat”

- Frontal apotome not as above; L2 -seta at least as long as half of segment length....................................................... 3

3. TII/III with 6 – 10 hooklets on conjunctive; shagreen of TII–TIV not contiguous to posterior row of spines; spines of caudal row on TIV almost as long as wide ( Fig. 9 F) ........................................................... Onconeura sp. “taquara”

- TII/III with 0 – 1 hooklet on conjunctive; shagreen of TII–TIV contiguous to caudal spine rows; spines of caudal row on TIV longer than wide ( Fig. 1 E) ................................................................................... Onconeura cascatinha sp.n.

4. TIII–TVII with three L-setae; fringe with less than 10 taeniate setae subequal or longer than anal lobus length......... ....................................................................................................................................... Onconeura oncovolsella sp.n.

- TIII–TVII with four L-setae; fringe with more than 10 taeniate setae longer than anal lobus ................................... 5

5. Conjunctive TV/VI and TVI/VII with 2 hooklets only; sternite II usually without shagreen ....................................... ............................................................................................... Onconeura sp. “ET157” (Ospina Torres 1992, fig. 164)

- Conjunctive TV/VI always and TVI/VII usually with more than two hooklets; sternite II with fine shagreen or long spines ........................................................................................................................................................................... 6

6. Points of shagreen on sternite II about as long as points of shagreen on sternite III .................................................. 7

- Posterior points of shagreen on sternite II longer than points of shagreen on sternite III ........................................... 8

7. L2 -seta of segment VIII very long reaching fringe bases; conjunctive TII/III usually with 4–5 hooklets..................... ...................................................................................................................................................... Onconeura japi sp.n.

- L2 -seta of segment VIII shorter; conjunctive TII/III usually with 2–3 hooklets............. Onconeura similispina sp.n.

8. Median area of TII, TIII and SII without shagreen; posterior field of shagreen on SII with strongly needle like spinules .................................................................................................................................... Onconeura sp. “ buriti”

- Median area of TII, TIII and SII with shagreen; posterior field of shagreen on SII with points slightly longer than others............................................................................................................................................................................ 9

9. Fringe with more than 20 taeniate setae longer than anal lobus; L2-seta on segment VIII longer and stronger than L1- seta ............................................................................................................... Onconeura semifimbriata ( Saether, 1981)

- Fringe with less than 15 taeniate setae longer than anal lobus; L-seta on segment VIII subequal ................................ ........................................................................................................ Onconeura undecimata Andersen et Saether 2005

Figures

FIGURE 1. Onconeura cascatinha n. sp. A – B — male, hypopygium, A — detail of tergite IX, dorsal, B — tergite IX removed, sclerites hatched; left: ventral, right: dorsal view with gonostylus removed. C – E — pupal abdomen, C — dorsal view, D — ventral view, E — detail of posterior row of spines on tergite IV.

FIGURE 9. Onconeura sp. “ hat ” A – B pupa and Onconeura sp. “ taquara ” C – F pupa. A - cephalothorax. C — frontal apotome. D — thorax. B, E — abdomen, dorsal view. F — detail of posterior row of spines on tergite IV.