Freshwater and other micro-organisms from Germany: Bicosoeca petiolata (von Stein 1878) Pringsheim 1947; (Bicosoecaceae) , Bicosoecidae, Bicosoecida, Bicosea, Bigyra, SAR, Eukaryota

Bicosoeca petiolata (von Stein 1878) Pringsheim 1947

Bicosoeca petiolata, a plankton species forming colonies consisting of biflagellated heterotroph cells with lorica. (1)

Bicosoeca petiolata, another colony, in some of the single cells the two cilia are visible (see images below). (2)

Bicosoeca petiolata, two crops of the above image. In contrast to choanoflagellates like for example Sphaeroeca volvox (with a single flagellum) the species of the group Bicosoecida have two different flagella >> (Heterokonta). The movement of the anterior, hairy flagellum (arrowhead) causes the cell to move forward, whereas the smooth flagellum which is positioned posteriorly (marked by arrow) is used to attach the cell to the lorica (Lo). (2)