S. Mahunka szerk.: Folia Entomologica Hungarica 44/2. (Budapest, 1983)
FOLIA ENTOMOLOGICA HUNGARICA ROVARTANI KÖZLEMÉNYEK XLIV. 2. 1983 p. 189-201 Ephemeroptera from Mongolia By VI. LANDA & T. SOLDÁN (Received March 29, 1983) Abstract: Thirty-two species of mayflies collected during Dr. KASZAB' s expeditions to Mongolia in 1964 - 1968 are listed and illustrated. Cinygmula kaszabi sp.n. (adult male and larva of Baetopus aslaticus are described and Slphlonurus alternates , Baetis vernus , Cloeon simile, Ecdyonurus loernensis, Prunella subm ontana , Caenis jungi, and Ephemera strigata are recorded from Mongolia for the first time. The species Baetopus asiaticus , B.montanus, and Oligoneuriela mongolica were described from the Dr. KASZAB' s material earlier. Faunistical and biogeographical aspects of species investigated are discussed. The mayfly fauna of Mongolia is realtively well known although most information concerning the species composition was obtained during several expeditions. IMANISHI (1940) first mentioned some species from this area but he left them mostly unnamed. TSHERNOVA (1952) described one species of Baetis from Eastern Mongolia (Chalchyn-gol). The results of the Mongolian-Soviet expedition to the Selenke river basin were published by BAYKOVA & VARYCHANOVA (1978). In all, they list 37 species from 9 families including a description of a new species of Ecdyonurus . The results of the Mongolian East German expeditions were elaborated by D. BRAASCH in series of papers (BRAASCH, 1977, 1979a, 1979b, 1980a, 1980b, 1982). He found 14 further species new to Mongolia and described 6 new species from the family Heptageniidae. Mongolian mayflies were also studied by SOLDÁN & LANDA (1977) and SOLPÁN (1978). These autors described 3 new species from the families Baetidae and Oligoneuriidae. Mayfly fauna of adjacent regions of (Central Asia, Siberia, Manchuria and Far East) was studied mainly by BRODSKY (1930), IMANISHI (1940), TSHERNOVA (1952, 1958), SOWA (1973), LEVANIDOVA (1982) and others. We had the opportunity to study the material of the Hungarian-Mongolian expeditions collected by Dr. Z. KASZAB in 1964, 1965, 1966, and 1968. This material consists mostly of adults and subimagoes collected at light traps so tha our information concerning larval habitats, life cycles and larval habits are consequently, very restricted. This paper deals with the taxonomy and biogeography of the species investigated. GENERAL FEATURES OF THE AREA INVESTIGATED Mongolia' s territory if situated in the centre of Asia exhibiting most of the physical features common for Central Asia as a whole. The natural conditions show a great variety of features (Fig. 1), prevailing biotopes can be classified as dry steppes of clean-cut continental type. Taking * Ergebnisse der zoologischen Forschungen von Dr. Z. Kaszab in der Mongolei, No. 483.
