Complex sentence: There are also smaller groups of eukaryotes whose position is uncertain or seems to fall outside the major groups--in particular, Haptophyta, Cryptophyta, Centrohelida, Telonemia, Picozoa, Apusomonadida, Ancyromonadida, Breviatea, and the genus "Collodictyon".
Split into simpler sentences: There are also smaller groups of eukaryotes whose position is uncertain or seems to fall outside the major groups. In particular, Haptophyta, Cryptophyta, Centrohelida, Telonemia, Picozoa, Apusomonadida, Ancyromonadida, Breviatea, and the genus "Collodictyon".