Fallceon sp.

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

Fallceon sp.

Fallceon longifolius, Lugo-Ortiz et al. 1994: 465 (misidentification; larvae)

Lugo-Ortiz et al. (1994) redescribed Mexican larvae of what they thought to be F. longifolius based on four larvae collected in Zacualtipán, Mexico. Although the species redescribed by them belongs to Fallceon , it is clear that this material is not F. longifolius (see discussion of F. longifolius above). We considered that the material previously described and illustrated as F. longifolius by Lugo-Ortiz et al. (1994: 465) represents a new species, but as we haven’t seen the material, we decided not to name this species.

According to Lugo-Ortiz et al. (1994) F. sp. can be easily differentiated from other members of the genus in the larval stage by the following combination of characters: (1) frontal keel present; (2) anterior margin of labrum subparallel, (3) number of denticles of each mandible; (4) shape and orientation of the molar of the left mandible; (5) shape of the right prostheca; (6) maxillae elongate with maxillary palps extending beyond galea-laciniae; (7) tarsal claws without subapical seta; (8) gills narrow, elongate and as long as two abdominal segment or longer; (9) tergal surface with abundant angulate scales bases and posterior margin with sharp triangular spines; (10) small size, shape, and number of spines of paraprocts (see Lugo-Ortiz et al. 1 994: Figs. 10–14 ).

As the species described by Lugo-Ortiz and McCafferty (1994) does not belong to F. longifolius , no species of this genus is found from both mainland of North America and a Caribbean island, as pointed out by these authors.

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.

FIGURES 13–26. Fallceon longifolius. Larva: 13, labrum, d.v.; 14, right mandible v.v.; 15, left mandible v.v.; 16, maxillae v.v.; 17, labium, left v.v., right d.v.; 18, hypopharynx v.v.; 19, fore leg; 20, distal end of femora; 21, fore tarsal claw; 22, abdominal tergum VI; 23, posterior margin of tergum IV; 24, gills I–VII; 25, thorax and abdomen l.v.; 26, paraproct.