Somogyi Múzeumok Közleményei 15. (2002)

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

ON THE CADDISFLIES OF THE RIVERS MURAAND KERKA 137 Fig. 3.: Lower section of River Kerka, at Kerkaszentkirály Protected and endangered species and habitats Ten species are protected legally in Hungary (Magyar Közlöny 1993, NÓGRÁDI, UHERKOVICH 1998b). Three of them occur in this region. Platyphylax frauenfeldi (Brau.). Its first known Hungarian occurrence is published right from this area, Magyarszombatfa (ÚJHELYI 1982a, 1982b, UHERKOVICH, NÓGRÁDI 1992). Later several adults were collected at some sites as sole specimens, but along the river Dráva it is more frequent: about a hundred adults were collected by light traps and personally (NÓGRÁDI, UHERKOVICH 1995b, 1998b, UHERKOVICH, NÓGRÁDI 1997). By the law quoted above its "theoretical value" rose to 50,000 HUF (1993). This high value is quite justified, as its last stable population in the world lives in the catchment area of river Dráva and Mura. The light trap at Szentpéterfölde captured some adults of this species: the water courses of that environment can be optimal for its demands. Along the rivers Kerka and Mura the species has not been collected, but we must suppose its occurrence here. Oligotricha striata (L.) is not very rare in West Hungary, but we consider it a rather vulnerable species because of the sensibility of its habitats, i.e. the small creeks running across hygrophilous meadows and bogs. First it was collected at Magyarszombatfa, later we had captures at Szőce, both in West Hungary Fig. 4.: Upper section of River Kerka, at Magyarföld (NÓGRÁDI, UHERKOVICH 1995a). It occurs also in Zemplén Mts., NE Hungary (OLÁH 1967), and according to Z. Varga's oral communication - it also lived in Nyírség, E Hungary. Limnephilus elegáns Curt., too, was first reported from Magyarszombatfa (ÚJHELYI 1982a, 1982b). Later it was collected in the Zselic Hills (a single adult, see NÓGRÁDI, UHERKOVICH 1990) and in Szigetköz, NW Hungary (two adults, unpublished). It is actually endangered, close to total extinction. In addition to the few protected species, the larger part of the Hungarian caddisflies are more or less endangered (NÓGRÁDI, UHERKOVICH 1998b). Accordingly, the enumerated ones of the 113 species can be classified in categories of endangerment: "Unknown or insufficently known". Such species do not occur in the area. "Extinct or vanished". As we do not have old data from here, no species can be classified into this category. It is most likely that Limnephilus elegáns Curt, or Hydroptila tineoides Dalman will belong here. "Endangered" (or: actually endangered). 18 such species occur in the area: Rhyacophila dorsalis (Curt.), Rhyacophila pascoei McL., Glossosoma boltoni Curt., Glossosoma conformis Neboiss, Hydroptila occulta (Eaton), Hydroptila tineoides Dalman, Allotrichia pallicornis (Eaton), Hydropryche siltalai Döhler, Cheumatopsyche lepida (Pict.), Polycentropus flavomaculatus (Pict.), Polycentropus irroratus Curt.,