Potamophylax, Wallengren, 1891

Martínez, Jesús, Martín, Luís & González, Marcos A., 2016, A new species ofPotamophylax from Spain with a key to the Iberian species (Trichoptera: Limnephilidae), Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 837-844 : 841-842

Key to the Iberian Potamophylax

In this key, we considered only the males of the five Iberian species of Potamophylax . Females were not included because most of them are still unknown ( P. albergaria and P. asturicus ) or their differentiation remains unclear ( P. cingulatus and P. latipennis ).

We illustrate the lateral view of the male genitalia ( Figs 9–13 ), because we consider the aspect of the inferior appendages to provide the clearest and most useful feature for correct identification of the species of this genus.

1 Inferior appendages with acute, rather narrow apices ( Fig. 11 ). ....................................... .............................................................................................. P. nigricornis (Pictet, 1834)

– Inferior appendages finger-like, mostly rounded, truncate or dilated at the apex. ......... 2

2 Inferior appendages from the side slender and clearly blackened and dilated at the tip ( Fig. 10 ). ............................................................................... P. latipennis (Curtis, 1834)

– Inferior appendages from the side not clearly dilated at the tip. .................................... 3

3 Inferior appendages from the side broad and obliquely truncated at the tip ( Fig. 9 ). ....... ......................................................................................... P. cingulatus (Stephens, 1837)

– Inferior appendages from the side digitiform at the tip. ................................................. 4

4 Posterior margin of the basal part of the inferior appendages from the side prominent and markedly convex; the distal part is acuminated, almost straight and directed obliquely upwards ( Fig. 13 ). ........................................................................... P. asturicus sp. nov.

– Posterior margin of the basal part of the inferior appendages from the side almost straight; the distal part is clearly digitiform, almost straight or slightly recurved outwards ( Fig. 12 ). ....................................................................................... P. albergaria Malicky, 1976

Figures

Figs 1–13. 1–5 – male genitalia of Potamophylax asturicus sp. nov.:1 – lateral view; 2 – caudal view; 3 – dorsal view; 4 – phallus and parameres, ventral view; 5 – phallus and parameres, lateral view. 6–7 – forewings: 6 – P. asturicus sp. nov., 7 – P. albergaria Malicky, 1976. Arrows highlight some minor differences observed between the venation of these two species. 8 – P. albergaria, male genitalia in caudal view. Scale bars: 1–5, 8 – 3.85 mm; 6–7 – 3.73 mm.