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e-ased.org, vol. 31, no. 4, pp.277-283, October, 2015

DOI: http://dx.doi.org/10.5635/ASED.2015.31.4.277

Taxonomic Redescription of Loxophyllum perihoplophorum and L. rostratum (Ciliophora: Pleurostomatida) from Korea

Se-Joo Kim1, Gi-Sik Min2,*
1Korean Bioinformation Center, Korea Research Institute Bioscience and Biotechnology, Daejeon 34141, Korea 2Department of Biological Sciences, Inha University, Incheon 22212, Korea

Abstract: Two pleurostomatid ciliates, Loxophyllum perihoplophorum Buddenbrock, 1920 and L. rostratum Cohn, 1866, were collected from the coastal waters of the East Sea, Korea. Their morphologies are described based on live observation and protargol staining, and morphometrics are provided. Loxophyllum perihoplophorum is characterized by the following features: 200-650 μm long in vivo; body slender leaf-shaped, flexible and contractile, with thin and wide extrusome- belted zone; 2 macronuclear nodules (Ma) and 1 micronucleus (Mi); 7-9 contractile vacuoles (CV) positioned along dorsal margin; extrusomes (Ex) evenly distributed along edge of entire body, with about 10 dorsal warts (Wa); 9-11 left (LSK) and 19-22 right somatic kineties (RSK), 4-5 furrows (Fu) on left side. Loxophyllum rostratum is about 100-130 μm long in vivo; body oblate leaf-shaped, contractile, convex ventral side and S-shaped dorsal side, beaklike anterior end; 2 Ma and 1 Mi; 1 CV terminally located; Ex distributed along edge of entire body, with about 9-10 dorsal Wa; 7-8 LSK and 15-19 RSK, ca. 5 Fu on left body side. In addition, sequences of small subunit ribosomal DNA were determined from these two Loxophyllum species and compared with the known Loxophyllum sequences.

Keyword: Haptoria, Pleurostomatida, Litonotidae, Loxophyllum perihoplophorum, Loxophyllum rostratum, East Sea, Korea