Polish Botanical Journal 57(2): 375–425, 2012 DIATOMS IN SPRINGS AND STREAMS OF TÜRKMEN MT. (SAKARYA RIVER BASIN) COMMON IN TURKISH INLAND WATERS CÜNEYT NADIR SOLAK & AGATA Z. WOJTAL Abstract. In a study of diatoms from ten springs and fi ve streams of Türkmen Mt. we identifi ed over 300 diatom species, 59 of which are among the most commonly reported diatoms from Turkey. Several of these diatoms are truly widespread but can also be accompanied or replaced by taxa of more limited distribution. Some commonly reported diatom species [e.g., Caloneis bacillum (Grunow) Cleve, Cymbella leptoceros (Ehrenberg) Kützing, Pinnularia viridis (Nitzsch) Ehrenberg] were not found in the material studied, but morphologically similar diatoms (e.g., P. viridiformis Krammer, Cymbella subleptoceros Krammer) were found in the springs and streams. We identifi ed some taxa included previously in the broad Caloneis bacillum concept [i.e., C. lancettula (Schulz) Lange-Bertalot & Witkowski, C. fontinalis (Grunow) Lange-Bertalot & Reichardt]. Previous records of several diatoms regarded as common but which we did not confi rm in the Türkmen Mt. area may very well be correct, as the reports from Turkey are from very diverse environments, including large rivers and lakes. However, the published data are largely unverifi able due to a general lack of collections and/or documentation. All the diatoms presented here are documented by light micrographs, and brief notes on their dimensions, distribution and ecology are provided. Caloneis lancettula, C. fontinalis, Cymbella affi niformis Krammer, C. subleptoceros and Pinnularia viridiformis are reported for the fi rst time from Turkey. Key words: Bacillariophyta, taxonomy, ecology, springs, streams, mountains, distribution, Turkey Cüneyt Nadir Solak, Department of Biology, Dumlupınar University, 43100, Kütahya, Turkey & Department of Palaeoceanology, Institute of Marine Sciences, University of Szczecin, Mickiewicza 18, 70-383, Szczecin, Poland; e-mail:
[email protected] Agata Z.