L. Forró szerk.: Miscellanea Zoologica Hungarica 13. 2000 (Budapest, 2000)

Kovács, T.; Ambrus, A.: Two rare plecopterans from the Rába: Agnetina elegantula (Klapálek, 1905) and Marthamea vitripennis (Burmeister, 1839) (Plecoptera: Perlidae)

Neoephemera maxima, Brachycercus europaeus, Cercobrachys minutus - at a single locality; Odonata: Ophiogomphus cecilia, Onychogomphus forcipatus - at three localities: Stylurus flavipes - at two localities: on the Lafnitz Heptagenia coerulans, Oligoneuriella rhenana and Ophiogomphus cecilia (Ambrus et al. 1998a) were present. Despite several collecting trials this species was not found above the mouth of the Lafnitz on the Rába neither on the Hungarian (Szakonyfalu) nor on the Austrian (Neumarkt, Mogersdorf) section. Marthamea vitripennis (Burmeister, 1839) Hungary: Rábapatona: road towards Koroncó, Rába, 110 m, XN87, 05.05.1999, 1, T. Kovács. This species is known from South Western, Middle, and South Eastern Europe (Zwick, 1984b). Two localities are known from Hungary: Forró (Mocsáry, 1899) and Budapest (Pongrácz, 1914). On the Little Hungarian Plain section of the River Rába, 14 kms from the mouth into the Mosoni-Duna a mature larva was collected from under a willow bush flooded by the river. At this sampling point the following rare mayfly and dragonflies were found Ephemerella notata, Stylurus flavipes and Ophiogomphus cecilia. (The flooding of the river made the collecting very difficult, during low water conditions a more diverse and more abundant fauna can be expected.) Discussion The five localities on the Rába and a further one on the Lafnitz of Agnetina elegantula is located on the hill-foot or hill area sections of these water bodies. On the higher river sections more rheophilous species are found. From our data it is evident that all sampling point harbours a diverse and hence valuable community. The Lafnitz and under its mouth the Rába down till Sárvár forms a unit as regards to the distribution of this species. Marthamea vitripennis was only found on the lower, plain section of the Rába. Zwick (1984b) publishes data from localities 1564 m a.s.l.. The detailed faunistic research of Rába section in between the area of the two species (from Sárvár to Rábapatona) might further refine the distribution map of these species reflecting our presentday knowledge (Fig. 1). We should mention here that in the identification key of Steinmann (1968) the drawing of Marthamea vitripennis larva [reprinted from Schoenemund (1927) (Figure 146. A)] in reality depicts Agnetina elegantula cf. Zwick, 1984a. The occurrence of these rare and endangered species on the Hungarian section of River Rába indicates the good water quality and near-natural state of this river, and emphasise the need of its protection. Acknowledgements We are grateful for the help of Adam Gazaczow, Tomás Soldán and Peter Zwick.