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

for Hungary) originates most probably from South America (NW Andes, GOLOVATCH et al. 2001). In Europe it inhabits exclusively hothouses. It was found in the Copenhagen greenhouse for the first time in 1986 by ZK and HENRIK ENGHOFF (ENGHOFF 1987). Cynedesmus formicola (family Pyrgodesmidae, also new to the fauna of Hungary) was originally described from the Canary Islands (VICENTE & ENGHOFF 1999), and, until now, was considered to be a Macaronesian endemic. Taxonomists still debate whether the species belongs to the genus Cynedesmus, since all other species of the genus are distributed in Central America. A good gonopod drawing, and scanning electron microscopic photographs were published by SlLVESTRl (1947) and VICENTE & ENGHOFF (1999), respectively. The other pyrgodesmid genus, Poratia, was recently revised by GOLOVATCH & SlERWALD (2000). Among the seven known species, two are regularly reported from European hothouses (P. digitata and P. obliterata), both being parthenogenetic here, whereas males are normally present in their region of origin (South America). Interestingly, the specimen found in the ELTE Füvészkert is a male. Its gonopod (Fig. 4) differs from all known males of the species in the genus, being closest, however, to digitata. More specimens have to be collected in order to decide whether we encountered an aberrant male from a parthenogenetic population, or indeed a new species for science. Phenetic classification The close relationship on the dendrogram (Fig. 2) between the Füvészkert (No. 7) and Soroksár (No. 21) localities is due to the fact that they are both permanently heated greenhouses, with many introduced exotic plants, and hence soil material. Their soil fauna is different from the other localities, because species not occurring outside hothouses are represented only here. The subsequent four localities (Népliget, No. 8; Rupp-hegy, No. 9; Palotai-sziget, No. 4; and Óbudai-sziget, No. 3) are well separated from each other. They all represent different semi-natural biotopes and human influences. Rupp-hegy is a protected, almost natural woodland in the Buda hills, Palotai-sziget and Óbudai-sziget are flooded forests at the bank of the Danube river, and Népliget is the largest city park in Budapest. This latter locality is perhaps also separated because millipedes were collected here from rotten logs and under bark. Three localities, Piliscsaba, Budakeszi and Normafa form one cluster. All of them are large, predominatly oak forests on the Buda Hills or Pilis Mountains. They represent semi-natural habitats used only for recreation. Páskomliget, Akadémia and Péterhalom also harbor similar fauna. These planted forests are on