Somogyi Múzeumok Közleményei 15. (2002)

Nógrádi Sára – Uherkovich Ákos: A Mura és Kerka vízrendszerének tegzesei (Trichoptera)

136 SÁRA NÓGRÁDI AND ÁKOS UHERKOVICH Oecetis testacea Curt., of which a few specimens were collected here, then it was not found anywhere for a long time. Recently Schmera captured it in the northern part of the Börzsöny Mountains (KISS, SCHMERA 1999). Setodes viridis Fourcr. was known only from this site for many years, but later we collected further adults in other sites of west Hungary (NÓGRÁDI, UHERKOVICH 1995a), recently we took an adult along the river Dráva (unpublished). Another actual endangered species of the Hungarian fauna is Limnephilus elegáns Curt., of which the first adults, too, were captured here (ÚJHELYI 1982a). However, later we collected a single adult in the Zselic Hills (NÓGRÁDI, UHERKOVICH 1990), and another one in the Szigetköz, NW Hungary (unpublished). Besides, several rare and very sparserly distributed species occured here, e. g. Rhyacophila pascoei McL., Agapetus delicatulus McL., Hydroptila tineoides Dalman, Allotrichia pallicornis (Eaton), Polycentropus irroratus Curt., Triaenodes simulans Tjeder, Adicella filicornis (Pict.). The other light trap was set near Szentpéterfölde by the Forestry Research Institute in order to prognose forestry pests. The site was surrounded by old, nearnatural forests, mainly ancient beeches and hornbeamoak forests. Data of a long-term examination of the lepidopterous fauna had been elaborated and published (UHERKOVICH 1982), while the determination of the caddisflies of certain periods have been completed only recently, and the results have not been published yet. We determined 64 caddisfly species from these materials (Table 2). A few of them occur only here within the area examined. Some „western" elements also appereared here, e. g. Oligotricha striata L., Rhadicoleptus alpestris alpestris Kol., Hydropsyche siltalai Döhler, Sericostoma personatum K. & Sp., these are characteristic mostly for west Hungary, the eastern foothills of the Alps and the Őrség Landscape Protection Area (county Vas). The examination of caddisflies along the rivers Kerka and Mura was done not long ago. During the short period since then, we have already pointed out 39 and 44 Trichoptera species, respectively (see Table 3), including some remarkable ones as well. The river Mura (Fig. 2) was more polluted one or two decades ago than recently. From those times we do not have any biological data, especially not about caddisflies. Recently we have collected some species characteristic mostly of fast-running waters rich in oxygen, e.g. Rhyacophila dorsalis Curt. This species is characteristic for the upper section of the Danube and its branches (NW Hungary) and the quicker sections of river Dráva (SW Hungary). A species having similar demands is Athripsodes albifrons L., which also lives in the upper Hungarian sections of the rivers Danube and Tisza. The others are more frequent ones. Surely, the number of species will increase considerably after more collections. Along the river Kerka, the left side tributary of Mura, we collected 44 species (Figs. 3-4). Some rarities of the Hungarian fauna occur also here, e.g. Ithytrichia lamellaris Eaton, Hydropsyche siltalai Döhler, Lepidostoma hirtum (F.), Athripsodes albifrons (L.), Athripsodes bilineatus (L.). After further examinations we are expecting more species: the number of species found here could well reach sixty or more. Fig. 2.: River Mura nearby Muraszemenye