Oxytrichella, Foissner, 2016

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 : 338-339

13. Oxytrichella mahadjacola Foissner, 2016 ( Fig. 2E )

Diagnosis: Urosomoidae with a single micronucleus. Body size 35 × 15 μm in protargol preparations; body shape ellipsoidal, flattened dorsoventrally, both body ends rounded; flexible. Nuclear apparatus composed of two macronuclear nodules with a single micronucleus at left mid­body. Cytoplasm colorless. Movement, without any peculiarities, crawling on soil surface. Seventeen frontal­ventral­transverse cirri composed of three frontal, one buccal, four frontoventral, three postoral ventral, two pretransverse ventral, and four transverse cirri. One left and one right marginal cirral row. Four dorsal kineties with three caudal cirri.

Remark: Oxytrichella mahadjacola is one of the smallest hypotrichs ( Berger, 1999; Foissner, 2016). Foissner (2016) reported the species from Venezuela (type locality). Based on the observation in vivo, it is very similar

E F G

to Oxytricha balladyna (= Monomicrocaryon balladyna ). Protargol impregnation is necessary for precise identification between the two species. Foissner (2016) established the genus Monomicrocaryon and transferred O. balladyna to the new genus Monomicrocaryon .

Voucher slides: Two slides including protargol­impregnated specimens have been deposited in the National Institute of Biological Resources in Korea (NIBRPR0000 107118, NIBRPR0000107119).

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.