A myxosporean species found to develop in the liver of 10 out of 24 common shrews, Sorex araneus L., caught in South Bohemia, Czech Republic, was identified as Soricimyxum fegati Prunescu, Prunescu, Pucek et Lom, 2007, the unique representative of the genus and the first myxosporean species known to develop from plasmodia to spores in a terrestrial mammal. The original description of this species, based on fixed material, is supplemented with new data based on fresh material and with partial sequence of SSU rDNA (GenBank Acc. No. EU232760). Phylogenetic analysis of SSU rDNA revealed that S. fegati is closely related to myxosporeans infecting gall bladders of freshwater fish.
New strains of non-vannellid flattened amoebae isolated from fish, an invertebrate and the marine environment were studied together with Flabellula citata Schaeffer, 1926 selected by morphology as a reference strain. The study revealed a paucity of features distinguishing individual strains at the generic level, but clearly evidenced mutual phylogenetic relationships within the assemblage of strains as well as their affiliation to the Leptomyxida. In this study, the SSU rDNA dataset of leptomyxids was expanded and a new branching pattern was presented within this lineage of Amoebozoa. Sequences of three newly introduced strains clustered in close relationship with the type strain of F. citata, the type species of the genus. Three strains, including one resembling Flamella sp., were positioned within a sister-group containing Paraflabellula spp. Results of phylogenetic analysis confirmed doubts of previous authors regarding generic assignment of several Rhizamoeba and Ripidomyxa strains.