Description of a new species of Fallceon from Cuba, and redescription of the larva of F. longifolius (Ephemeroptera, Baetidae) Author González-Lazo, D. Facultad de Ciencias Naturales de la Universidad de Oriente, Departamento de Biología, Santiago de Cuba, Patricio Lumumba s / n esq. Ave. de las Américas. CP. 90 500. Cuba. E-mail: dani @ cnt. uo. edu. cu Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, Departamento de Ciências da Saúde, Biológicas e Agrárias, São Mateus, Espírito Santo, 29933 - 415, Brazil. E-mail: ffsalles @ gmail. com Author Salles, F. F. text Zootaxa 2007 2007-09-12 1583 1 51 57 https://biotaxa.org/Zootaxa/article/view/zootaxa.1583.1.6 journal article 10.11646/zootaxa.1583.1.6 1175­5334 5097863 453379F1-875A-4BA3-A9FF-49568A3F5DFD 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.