Ametropus fragilis Albarda, 1878

Sartori, Michel & Bauernfeind, Ernst, 2020, Mayfly types and additional material (Insecta: Ephemeroptera) examined by F. - J. Pictet and A. - E. Pictet, housed in the Museums of Natural History of Geneva and Vienna, Revue suisse de Zoologie 127 (2), pp. 315-339 : 334

Ametropus fragilis Albarda, 1878

Ametropus fragilis Albarda, 1878: 129 .

Material: MHNG; 1 ♂ imago; 600 81 Italie Anc[ienne] Coll[ection] / 192 61 / 30 / Ametropus fragilis Albarda Eaton determ. [abdomen broken, remaining parts with fungal growth] ( Fig. 9B ).

Remarks: This specimen is intriguing. The identification made by Eaton is correct, because it is based on the peculiar arrangement of veins in the cubital and anal fields ( Fig. 9A ). Eaton (1885) did not mention this specimen from Italy, restricting the distribution of the species to the type locality in Holland. It is therefore possible that the specimen was identified by Eaton after the publication of his monograph. The first record of A. fragilis from Italy was by Turin et al. (1997). These authors suspected this surprising discovery to be due to a recent introduction with fishes from Eastern Europe. The fact that this specimen was collected more than 150 years ago indicates that further investigations on the distribution of this species in Italy are needed and that its occurrence may be natural. The recent discovery of A. fragilis in Croatia points in the same direction ( Cuk et al., 2015).

Figures

Fig. 9. Ametropus fragilis Albarda, 1878. (A) Male imago in dorso-lateral view; A1: first anal vein, CuP: posterior cubital vein. Scale bar: 1 mm. (B) Corresponding labels.