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Inventaire des Ephémères de Lorraine et de Champagne-Ardenne (N-E France) : premiers résultats (Ephemeroptera)

Auteurs : Jacquemin (Gilles) et Coppa (Gennaro)

Année de publication : 1996
Publication : Mitteilungen des schweizerischen entomologischen Gesellschaft
Volume : 69
Fascicule : 1
Pagination : 141-155

Résumé :

Since 1989 the authors have undertaken a survey of the Ephemeroptera in two north-eastern administrative regions of France: Lorraine and Champagne-Ardenne. So far. only sparse and sometimes little reliable data are available in the literature with regard to northern France, so that the results already obtained (about 4000 data) are worth to be published. To date. 67 species were observed (57 in Lorraine and 60 in Champagne-Ardennes), of which some are of particular interest: Ameletus inopinatus, Metreletus balcanicus. Ecdyonurus insignis. Heptagenia flava, H. fuscogrisea. H. coerulans, Ephoron virgo... Some taxonomical problems exist, for example, in connection with the genera Ecdyonurus, Rhithrogena. Cloeon. and Pseudocentroptllum, which should be solved when a more abundant material has been gathered (imagines especially). The specific richness of the region is partly due to his landscape diversity, involving a great diversity of biotopes: clayey low plains, plateaux, calcareous or marly-calcareous cuestas. old massifs of the Ardenne and the Vosges (with granites, sandstones, schists, etc.). For several species, the collected data display particular distributions, which are presented on maps; thus we can recognize: - species distributed along the main rivers (for example Baetis buceratus, Ephoron virgo, Potamanthus luteus...) - species linked to montaneous small streams (Baetis melanonyx, Epeorus sylvicola), sometimes restricted to the Vosges (Baetis alpinus, Ephemerella mucronata) - species likely linked to some geological parameters (Metreletus balcanicus, Baetis melanonyx). These data are compared to those available in the literature, concerning the neighbouring regions.