02203nas a2200241   4500008004100000245018900041210006900230260001000299300001200309490000700321520136700328653002001695653001201715653001501727653003501742653003201777653003401809653001401843100001601857700002101873700002001894856004701914       1994                        eng d00aGeneric limits and taxonomic features of some genera belonging to the tribe of Chrysogasterini (Diptera, Syrphidae) .1. Generic diagnosis and description of <i>Riponnensia</i>, Gen-Nov0 aGeneric limits and taxonomic features of some genera belonging t  aParis  a217-2470 v303 aA systematic review of the genera Lejogaster Rondani, Chrysogaster Meigen and Orthonevra Macquart is presented, based on both larval and adult criteria. This study allows us to check the morphological features characteristic of each taxon as well as to define some new features and leads to the following conclusions : - a) Lejogaster and Orthonevra are validly regarded as separate genera, rather than as subgenera of Chrysogaster, - b) Orthonevra, as recognised until now, comprises a polyphyletic group of species in Europe : Orthonevra sensu stricto and Riponnensia, gen. nov. Riponnensia includes four species, R. splendens (Meigen) [type species], R. daccordi (Claussen), R. insignis (Loew) and R. longicornis (Loew); - c) Chrysogaster sensu stricto comprises two distinct groups of species in Europe, that require recognition at generic level; the type species of the genus Chrysogaster, = C solstitialis (Fal.), belongs to the first group, while Rondani’s Melanogaster is available for the second group with M. nubilis Rondani as type species. The name nuda (Macquart) is established as the senior synonym of nubilis Rondani, to replace lucida (Scopoli), which is shown (Maibach et al., in press) to have been wrongly applied. A dichotomous key, providing with the separation of the five genera, both at immature stages and adults, completes this work.10aChrysogasterini10aDiptera10aOrthonevra10aOrthonevra argentina (Brethes)10aOrthonevra nobilis (Fallen)10aOrthonevra pictipennis (Loew)10aSyrphidae1 aMaibach, A.1 aDetiefenau, P.G.1 aSpeight, M.C.D.  uhttps://syrphidae.myspecies.info/node/949501646nas a2200193   4500008004100000245018700041210006900228300001200297490000800309520095700317653001701274653003101291653002001322653001201342653001401354100001601368700002101384856004701405       1994                        eng d00aGeneric limits and taxonomic features of some genera belonging to the tribe of Chrysogasterini (Diptera, Syrphidae) .3. Description of immature stages of some West Palearctic species0 aGeneric limits and taxonomic features of some genera belonging t  a369-4110 v1013 aFollowing the recent revision of the generic limits of the genera Lejogaster Rondani, Chrysogaster Meigen and Orthonevra Macquart, with the revalidation of Melanogaster Rondani and the creation of a new genus Riponnensia (Maibach et al. 1994a), we present a morphological synthesis of all the immature stages of these genera known, at present, in the west palaearctic region. Besides the re-description of larvae and puparia of Chrysogaster solstitialis (Fallen), Lejogaster metallina (Fabricius), L. tarsata (Megerle in Meigen). Melanogaster hirtella (Loew), M. nuda (Macquart), Orthonevra brevicornis (Loew) and Riponnensia splendens (Meigen), we describe for the first time the immature stages of Melanogaster aerosa (Loew), Orthonevra nobilis (Fallen) and O. onytes (Seguy). Biological notes on the developmental stages are included, as well as a key to the identification of the presently known European larvae and puparia of the concerned genera.10aChrysogaster10aChrysogaster hirtella Loew10aChrysogasterini10aDiptera10aSyrphidae1 aMaibach, A.1 aDetiefenau, P.G.  uhttps://syrphidae.myspecies.info/node/949602470nas a2200193   4500008004100000245024000041210006900281260001000350300001200360490000700372520174700379653002002126653001202146653001402158100001602172700002102188700002002209856004702229       1994                        eng d00aGeneric limits and taxonomic features of some genera belonging to the tribe of Chrysogasterini (Diptera, Syrphidae) .2. Taxonomic, nomenclatural status of studied species and analysis of the complex <i>Melanogaster</i> Macquarti (Loew)0 aGeneric limits and taxonomic features of some genera belonging t  aParis  a253-2710 v303 aFollowing the recent systematic review of the generic limits of the genera Lejogaster Rondani, Chrysogaster Meigen and Orthonevra Macquart, the revalidation of Melanogaster Rondani and the creation of a new genus Riponnensia (Maibach et al., 1994), we present and justify in this paper all the nomenclatural changes resulting from this review. In addition, we clarify the taxonomic status of cryptic species belonging to the complex Melanogaster macquarti (Loew), with, as result, the revalidation and/or the redescription of Melanogaster aerosa (Loew) and Melanogaster parumplicata (Loew). Type material is designated for the following species (mentionned here under their original name and not their present status) : Chrysogaster aerosa Loew [Lectotype], C. discicornis Megerle in Meigen [Lectotype], C. elegans Wiedemann in Meigen [Holotype], C. fumipennis Loew [Lectotype], C. grandicornis Meigen [Holotype], C. hirtella Loew [Lectotype], C. incisa Loew [Holotype], C. insignis Loew [Holotype], C. longicornis Loew [Lectotype], C. macquarti Loew [Lectotype], C. nuda Macquart [Lectotype], C. parumplicata Loew [Lectotype], C. splendens Meigen [Lectotype], C. violacea Meigen [Lecotype], C. tarsata Megerle in Meigen [Neotype], C. virescens Loew [Lectotype], Crysogaster (Lejogaster) virgo Rondani [Lectotype], Melanogaster nubilis Rondani [Lectotype]. Besides, three synonyms are established or confirmed: Chrysogaster parumplicata (Loew) is a senior synonym of Melanogaster macquarti Loew, Chrysogaster tarsata is a senior synonym of L. splendida Megerle in Meigen as well as of Crysogaster (Lejogaster) virgo Rondani. Finally, the name lucida Scopoli is shown to have been wrongly applied as a replacement name for viduata auct. nec L.10aChrysogasterini10aDiptera10aSyrphidae1 aMaibach, A.1 aDetiefenau, P.G.1 aSpeight, M.C.D.  uhttps://syrphidae.myspecies.info/node/9501