Dolichopodid flies at De Mandelhoek nature reserve (Belgium): an example of the importance of small nature reserves to invertebrates
1992
Pollet, M. | Grootaert, P. (Royal Belgian Inst. of Natural Sciences, Brussel (Belgium). Dept. of Entomology) | Meuffels, H.
During two successive years, extensive inventories on Dolichopodidae (Diptera) were carried out in a small nature reserve (6.5 ha), De Mandelhoek (Ingelmunster, Belgium), using Malaise and water traps, net sweeping and hand catching. These sampling campaigns revealed not only a very rich dolichopodid fauna (80 species) but also surprising high number of rare species, for some of which large populations could be established. Medetera pseudoapicalis Thuneberg is new reported for Belgium and two species new to science were also detected. For the following species, the ecology and distribution in Belgium is discussed in detail: Achalcus cinereus (Haliday), A. flavicollis (Meigen), Campsicnemus lumbatus Loew, Dolichopus excisus Loew, D. signifer Haliday, Hercostomus fulvicaudis (Haliday), H. silvestris Pollet, Medetera feminina Negrobov, M. inspissata Collin, M. jugalis Collin, M. pseudoapicalis, Sciapus laetus (Meigen), Teuchophorus simplex Mix and Thrypticus bellus Loew. In the frame of nature conservation, despite its small area De Mandelhoek Nature Reserve can be considered as extremely valuable.
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