Lopescladius (Cordiella)

Hagenlund, Linn K., Andersen, Trond & Mendes, Humberto F., 2010, New species of Lopescladius (Cordiella) Coffman et Roback (Chironomidae: Orthocladiinae) from Brazil, Zootaxa 2728, pp. 39-49 : 48

Key to the males of Lopescladius (Cordiella)

1. Gonostylus with posterior elongation; inferior volsella spiniform or absent. Lopescladius s. str...............(not keyed)

- Gonostylus without posterior elongation; inferior volsella single or double, broadly digitiform, with or without api- cal hook. Lopescladius (Cordiella) Coffman et Roback ............................................................................................... 2

2. Anterior branch of inferior volsella lacking ( Coffman & Roback 1984, fig. 7). Pennsylvania, U.S.A......................... ......................................................................................................................... L. (C.) hyporheicus Coffman et Roback

- Anterior branch of inferior volsella present.................................................................................................................. 3

3. Posterior branch of superior volsella with apical hook, projecting orally ( Figs 20–21 ). São Paulo State, Brazil.......... ...................................................................................................................................................... L. (C.) uncatus sp. n.

- Posterior branch of superior volsella gently curved, projecting anteromedially .......................................................... 4

4. Small pale brown species, wing length 0.75–0.83 mm. Pará State, Brazil.................................. L. (C.) morosus sp. n.

- Larger dark brown species, wing length 1.20–1.22 mm. Santa Catarina State, Brazil............ L. (C.) vibrissatus sp. n.

Figures

FIGURES 17 – 21. Lopescladius (Cordiella) uncatus sp. n., male. 17 — tentorium, stipes and cibarial pump; 18 — thorax; 19 — wing; 20 — hypopygium with tergite IX removed, dorsal aspect to the left and ventral aspect to the right; 21 — hypopygium, dorsal aspect.