Ábrahám Levente (szerk.): Válogatott tanulmányok IV. - Natura Somogyiensis 15. / Miscellanea 4. (Kaposvár, 2009)
Fazekas Imre - Lesar Tone: Az Oporopsamma wertheimsteni (Rebel, 1913) elterjedése Közép-Európában
198 Natura Somogyiensis О. wertheimsteini is a rare species with very isolated populations in Hungary. Occurs very locally in Great Hungarian plain (a.s.l.m. 75-200 m), and sporadically in some habitats of moderate altitude in the mountains (Transdanubian Mountains; a.s.l.m. 200-756 m). Further west, it is unknown in most other countries. A xerothermophilous species, in Hungary the typical habitats where the moths fly are open sand steppes and lowland dry degraded grasslands, on secondary in rock- and slope steppes and in arboreta and botanical gardens. In the Hortobágy National Park it is found on the extensive grassy ’’pusztáé” and steppe-like grasslands mainly on saline substrata, and the less extensive marshes and lakes as well as the two largest remaining original oak woods. This habitat is unique, not only in Hungary but also in other parts of Central Europe, and a similar vegetational complex occurs, at the nearest, only beyond the Volga desert in the Russia. According to Gozmány (1983), the species is characteristic of sandy areas in the Great Plain in Hungary and the adjoining areas of Romania (Transylvania and the Deliblat desert). Range in Slovakia Examined material: According to G. Pastoralis (in litt.) little specimen from Záhorská nízina, Sastín-Stráze desert; 1$ 20.09.1957. leg. Schwarz, in private coll. Liska (Praha, CZ). Razowski (1959) published data earlier from this region, but there are no more recent records. The species is apparently very rare and local in Slovakia, but could he overlooked and therefore careful search is required. The Slovakian populations are a long distance from those in the Hungary. Gene flow in uncertain; the species may be in regression and endangered in Slovakia. The habitat is identical to that in Hungary (see Fig. 4b); locally extensive sand dunes and pannonié sand steppes. There are similar habitats in central Hungary, mainly in Kiskunság National Park. Range in Slovenia Examined material: 1 ex Spodnje Konjiáőe on Mura River, 2006. X. 27. (leg. Lesar, Jez, coll. Lesar). Rare species, known only from this specimen. The habitat is lowland mixed woodland on the right bank of the Slovenian-Austrian-border-river Mura. This part of North-East Slovenia belongs to the subpannonian region so the occurrence of this species there was not a very great surprise and further findings in the area are to be expected. At present, this is the most westward known point of its distribution in Central Europe. The species is new for Slovenia (Lesar & Verovnik 2008) and was unknown there in 2005, so it is not included in the List of Microlepidoptera for North-East Slovenia (Lesar & Habeler 2005). Acknowledgements We thank Gabriel Pastorális (SK-Komámo) Jan Liska (CZ-Praha), Zsolt Bálint (H-Budapest, Hungarian Nat. Hist. Mus.), Csaba Szabóky (H-Budapest) for information on the geographical distribution of the species and Frantisek Slamka (SK-Bratislava) is thanked for the photo from Slovakia. Barry Goater (GB-Chandlers Ford) corrected the English language of the manuscript. We are grateful to all for their help.
