01011nas a2200145 4500008004100000245009200041210006900133300001000202490000600212520052500218100002800743700001500771700001700786856006200803 1990 eng d00aSur quelques especes de Platycheirus (Diptera, Syrphidae) nouvelles ou meconnues. 0 aSur quelques especes de Platycheirus Diptera Syrphidae nouvelles a19-440 v53 a

The males and females of three new European species of Platycheirus closely related to P. clypeatus (MEIGEN, 1822), are described: P.  europaeus n.sp., P.  occultus n.sp. and P. ramsarensis n.sp. In addition, P. angustipes GOELDLIN DE TIEFENAU, 1974 is redescribed and lectotypes are designated for P. angustatus and P. clypeatus. Features of the physical environment characteristic of the habitat of some of these species are considered.

1 aGoeldlin de Tiefenau, P1 aMaibach, A1 aSpeight, MCD uhttp://www.dipteristsforum.org.uk/documents/DD/df_1_5.pdf00909nas a2200121 4500008004100000245016600041210006900207300000900276520039500285100001700680700002800697856006200725 1990 eng d00aKeys to distinguish Platycheirus angustipes, P. europaeus, P. occultus and P. ramsarensis (Dipt., Syrphidae) from other clypeatus group species known in Europe0 aKeys to distinguish Platycheirus angustipes P europaeus P occult a5-183 a

The clypeatus group of species in the genus Platycheirus is defined. Separate keys are presented for distinguishing the males and females of the 12 European clypeatus group species. All available information, including distribution records, is summarised for P.anguslipes, P. europaeus, P. occultus and P. ramsarensis.

1 aSpeight, MCD1 aGoeldlin de Tiefenau, P uhttp://www.dipteristsforum.org.uk/documents/DD/df_1_5.pdf