Fallceon (Lugo-Ortiz & McCafferty, 1999)

González-Lazo, D. & Salles, F. F., 2007, Description of a new species of Fallceon from Cuba, and redescription of the larva of F. longifolius (Ephemeroptera, Baetidae), Zootaxa 1583 (1), pp. 51-57 : 56

Key to the larvae of Fallceon from Cuba *

1 Frontal keel present..................................................................................................................................... 2

- Frontal keel absent...................................................................................................................................... 5

2 Abdominal gills 3-6 at least as long as two abdominal segments ................................. F. longifolius Kluge

- Abdominal gills 3-6 at most as long one and a half abdominal segments................................................... 3

3 Paraglossae narrow and pointed apically...................................................................... F. testudineus Kluge

- Paraglossae broad and rounded apically..................................................................................................... 4

4 Abdominal gills widest distally ............................................................................................ F. s extus Kluge

- Abdominal gills widest medially ....................................................... F. nikitai McCafferty and Lugo-Ortiz

5 Scales on terga small and sparse .................................................................................... F. alcarrazae Kluge

- Scales on terga large and dense ( Fig. 9 ) ...................................................................................................... 6

6 Dorsal margin of femora with few setae; body size between 3.0–4.0 mm.................... F. planifrons Kluge

- Dorsal margin of femora with greater number of setae ( Fig. 7 ); body size between 7.5–8.0 mm ................ ............................................................................................................................................. F. grandis sp. n. *The species F. poeyi is not included in this key because the larva is unknown.

Figures

FIGURES 1–12. Fallceon grandis sp.n. Larva: 1, labrum, d.v.; 2, right mandible v.v.; 3, left mandible v.v.; 4, maxillae v.v.; 5, labium, left v.v., right d.v.; 6, hypopharynx v.v.; 7, fore leg; 8, fore tarsal claw; 9, posterior margin of tergum IV; 10, gills I–VII; 11, gill IV (detail of margin); 12, paraproct.