Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 94. (Budapest 2002)

Korsós, Z., Hornung, E. , Szlávecz, K. ; Kontschán, J.: Isopoda and Diplopoda of urban habitats: new data to the fauna of Budapest

Another isopod previously unknown from Budapest is Platyarthrus schoeblii BUDDE-LUND, 1885. This time only its more common relative, P. hojfmannseggii was collected, but earlier HORNUNG and TARTALLY (unpubl.) found P. schoeblii at several localities in Budapest. It occurs in the nests of the ant Lasius neglectus VAN LOON, BOOMSMA et ANDRÁSFALVY, 1990 (KONTSCHÁN & HORNUNG 2001). This introduced ant is agressively spreading in urban habitats all over Europe. To our present knowledge the isopod is associated only with L. neglectus in Hungary. The species composition of isopods of the different localities reflects the degree of anthropogenic impact. For instance, Orthometopon planum, Trachelipus ratzeburgii and Protracheoniscus politus were collected only in semi-natural habitats with less disturbance, such as the forests of Rupp-hegy, Normafa, Budakeszi, Piliscsaba, and Virányos, or as remnants of a former natural fauna as in Margitsziget. Although the forest stands are often fragmented, isolated and surrounded by suburban residential areas, they still sustain populations of these more sensitive isopods. Armadillidium vulgare and Porcellium collicola are more ubiquitous, expansive species that also tolerate a wide range of moisture conditions. They dominate the planted, more disturbed forests in Pest (Páskomliget, Akadémia-erdő, Péterhalom, Cinkota). Other species, such as Cylisticus convexus and Porcellionides pruinosus always indicate strong human influence. Diplopoda Millipedes from urban and other anthropogenic habitats in Hungary were studied previously by KORSÓS (1992). Comparing the present findings with those results reveals several interesting facts. For instance, Dorypetalum degenerans, a callipodid millipede, was not found on the Gellérthegy this time perhaps due to lack of specific search. Similarly, Cylindroiulus latestriatus did not turn out in Városliget. Previously it was found for the first time in Hungary together with Mesoiulus paradoxus, a blind julid species (KORSÓS 1992). This time the latter species was found only in the greenhouse at Soroksár. The members of the Cylindroiulus truncorum-group (see KORSÓS & ENGHOFF 1990) are usually present in European hothouses, yet the present collectings did not yield any specimen. The eastern julid species, Xestoiulus laeticollis, was found in the semi-natural flooded forest of Palotai-sziget. This is an interesting record considering that formerly it was known only from the Bátorliget Nature Reserve (KORSÓS 1991) and along the Dráva river (KORSÓS 1997). Three polydesmid species are reported for the first time in Hungary. Amphitomeus attemsii, a member of the family Oniscodesmidae (new millipede family