Frontonia depressa (Stokes, 1886) Kahl, 1931

Kim, Ji-Yeong & Jung, Jae-Ho, 2016, Taxonomic survey on ciliate diversity in eastern area of Kangwon-province, Korea: Brief records of fifteen species unrecorded from Korea, Journal of Species Research 5 (3), pp. 333-342 : 337

9. Frontonia depressa (Stokes, 1886) Kahl, 1931

( Fig. 2A )

Diagnosis: Body size 65 × 30 μm in protargol preparations; body ellipsoidal to lightly ovate, posterior body end rounded. Macronuclear nodule spherical to elliptical, positioned at mid­body. Contractile vacuole at mid­body with single excretory pore. Cytoplasm colorless. Oral apparatus slightly above mid­body.

Remark: It is first record of the genus from Korea. Foissner et al. (2002) provided detailed comparison to separate congeners mainly by 1) buccal cavity; 2) postoral suture; and 3) excretory pore.

Voucher slides: Two slides including protargol­impregnated specimens have been deposited in the National Institute of Biological Resources in Korea (NIBRPR0000 107142, NIBRPR0000107143).

Figures

Fig. 2. Protargol­stained specimens, ventral views. A. Frontonia depressa, 65 μm in length; B. Anteholosticha distyla, 125 μm in length; C. Periholosticha paucicirrata, 70 μm in length; D. Saudithrix terricola, 220 μm in length; E. Oxytrichella mahadjacola, 35 μm in length; F. Notohymena antarctica, 80μm in length; G. Phacodinium metchnicoffi, 100 μm in length.