B. Papp szerk.: Studia Botanica Hungarica 34. 2003 (Budapest, 2003)

Buczkó, Krisztina: Diadesmis brekkaensoides (W. Bock) Moser, Lange-Bertalot et Metzeltin: a new aerophytic diatom for the Hungarian flora

(http://www.calacademy.org/research/diatoms/, www.geog.ucl.ac.uk/ecrc/amphora/ diatcode/diatcode; http://craticula.ncl.ac.uk; http://diatomwebserver.awi-bremerhaven) do not mention the species. The rarity of the taxon has been justified by the fact that the detailed and comprehensive work of LANGE-BERTALOT (1980) about the chain-forming species of the genera Fragilaria and Navicula, D. brekkaensoides or its synonyms are not mentioned at all. According to the data available on Diadesmis brekkaensoides, the species can be regarded as a rare aerophytic diatom. Throughout the world, it is normally absent from the characteristic flora of cave entrances as well as from the more internal parts of caves ("dark flora" and "lamp lit flora"). Based on the substrate preferences lumping of D. brekkanesis and D. brekkaensoides seems unreasonable, thus I do agree with keeping them separate entities. "All caves in Hungary have been protected since 1961 for their natural historical, historical and economic significance. Of the nearly 3700 recorded caves 132 are strictly protected." (SZÉKELY 2003). Fortunately, the Kiskőhát shaft is one of these strictly protected caves, therefore the hereby described population of Diadesmis brekkaensoides is protected by the law. * * * Acknowledgements - I would like to express my thanks to Agata Wojta] (W. Szafer Institute of Botany, Poland), who has sent some missing literature and revised the manuscript. I am also grateful to Judit Padisák for her help. The pictures were made by Zoosystem Bt. Hungary, Veszprémvarsány. The fieldwork was organised and managed by Miklós Rajczy. The research was partially supported by the Hungarian Scientific Research Fund (OTKA 43078). REFERENCES BOCK, W. (1963): Diatomeen extrem trockener Standorte. - Nova Hedwigia 5: 199-254. BUCZKÓ, K. and RAJCZY, M. (1989): Contributions to the flora of the Hungarian caves. II. Flora of three caves near Beremend, Hungary. - Studia bot. hung. 21: 13-26. HAJDÚ, L. (1977): The flora of Hungarian caves. - Karszt és Barlang, Special Issue, pp. 39^42. KRAMMER, K. and LANGE-BERTALOT, H. (1985): Naviculaceae, neue und wenig bekannte Taxa, neue Kombinationen und Synonyme sowie Bemerkungen zu einigen Gattungen. - Bibl. Diatomoi 9: 1-230. KRAMMER, K. and LANGE-BERTALOT, H. (1986): Bacillariophyceae 1. Teil: Naviculaceae. - In: ETTL, H., GERLOFE, J., HEYNIG, H. and MOLLENHAUER, D. (eds): Süsswasserflora von Mitteleuropa, Vol. 2/1. G. Fischer, Stuttgart, New York, 876 pp. KUSBER, W.-H. and JAHN, R. (2003): Annotated list of diatom names by Horst Lange-Bertalot and co-workers. Version 3.0. - [http://www.algaterra.org/Names_Version3_0.pdf]. LANGE-BERTALOT, H. (1980): Zur systematischen Bewertung der bandförmigen Kolonien bei Navicula and Fragilaria. - Nova Hedwigia 33: 723-787.