Abstract
One new <em>Heteronema</em> cf. distigmoides Christen and three rare taxa of <em>H. acus</em> (Ehrenberg) Stein, <em>H. spirale</em> KLEBS and <em>H. nebulosum</em> (Dujardin) Klebs were reported for the Polish flora. All of them were found in the mesotrophic Lake Piaseczno and in a small village pond in Kaniwola, in 2002. Both water reservoirs are situated on the Łęczna-Włodawa Lakeland (Eastern Poland). The above mentioned species are new to the flora of the Łęczna-Włodawa Lakeland, probably because of insufficient research, which was carried out on euglenophytes in this area previously. All the presented species are described thoroughly and illustrated in this paper.
Highlights
Heteronema Dujardin 1841 is one of the colourless genera of Euglenophyta (Euglenida) belonging to the order Heteronematales (Heteronematina) (Leedale 1967; Walne and Kivic 1989)
The number of known taxa of the genus Heteronema has been increasing during the last 50 years: 19 species were given by Huber-Pestalozzi (1955), 22 by Starmach (1983), 25 by Lee et al (2000) and 43 by Schroeckh et al (2003)
Four taxa of colourless euglenophytes which were found in the near-shore zone of Piaseczno Lake and in the village pond in Kaniwola are presented
Summary
Heteronema Dujardin 1841 is one of the colourless genera of Euglenophyta (Euglenida) belonging to the order Heteronematales (Heteronematina) (Leedale 1967; Walne and Kivic 1989).
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