Tropidoatractidae fam. nov., a Deep Branching Lineage of Metopida (Armophorea,Ciliophora) Found in Diverse Habitats and Possessing Prokaryotic Symbionts
1. Department of Zoology, Faculty of Science, Charles University, Vini?ná 7, 128 00 Prague, Czech Republic;2. Department of Biological Sciences, Boise State University, Boise, ID 83725-1515, USA