Gravatamberus, Mendes & Andersen, 2008

Mendes, Humberto Fonseca & Andersen, Trond, 2008, A review of Antillocladius Saether and Litocladius Mendes, Andersen et Saether, with the description of two new Neotropical genera (Diptera, Chironomidae, Orthocladiinae), Zootaxa 1887 (1), pp. 1-75 : 43

Key to the males of Gravatamberus gen. n.

1. Cell m with less than 10 (1–7) setae proximal to RM..................................................................................2

- Cell m with more than 10 (13–33) setae proximal to RM............................................................................3

2. Costal extension 68–86 µm long, ending well before wing tip; inferior volsella apically without free lobe. Costa Rica, Mexico............................................................................................................... G.curtus sp. n.

- Costal extension about 150 µm long, ending close to wing tip; inferior volsella apically with short free lobe. Venezuela.................................................................................................................. G. apicalus sp. n.

3. Costal extension ending well before wing tip. Brazil................................................... G. nidularium sp. n.

- Costal extension ending close to wing tip....................................................................................................4

4. AR 0.26. Guatemala................................................................................................ G. guatemaltecus sp. n.

- AR 0.74–0.84. Chile............................................................................................................ G.pilosus sp. n.