Seven scuticociliates (Protozoa, Ciliophora) from Alabama, USA, with descriptions of two parasitic species isolated from a freshwater mussel Potamilus purpuratus Author Xuming Pan text European Journal of Taxonomy 2016 249 1 19 journal article 37563 10.5852/ejt.2016.249 09521c67-41e4-40da-9d43-97412eb789e9 118-9773 200009 urn:lsid:zoobank.org:pub:43278833-B695-4375-B1BD-E98C28A9E50E Uronemita filificum Kahl, 1931 Fig. 4A–E ; Table 1 Description Description based on Alabama population: body 30–45 × 15–20 μm in vivo , inverted pear-shaped with large, conspicuous apical plate ( Fig 4A–B ). Dorsal side conspicuously convex. Length of buccal field 60% of body. Extrusomes appromately 2 µm long, rod-shaped, closely beneath pellicle. Cytoplasm colourless to grayish, containing several (ca 3 μm across) food vacuoles and dumbbell-shaped crystals (ca 1–2 µm long) often concentrated in anterior end of body ( Fig. 4C ). Single macronucleus larg ( Fig. 4E ). Locomotion by swimming aimlessly, sometimes rotates while attached to substratum by caudal cilium. Eighteen or 19 somatic kineties, anterior third of each composed of dikinetids ( Fig. 4E ). M1 single-rowed with five or six kinetosomes ( Fig. 4D ); M2 three-rowed; M3 smaller and close to M2 ( Fig. 4D ). PM on right of shallow buccal cavity, with zigzag row of basal bodies, extending anteriorly to the middle of M2. Scutica consisting of three or four basal body pairs ( Fig. 4D ).