Grossglockneria acuta Foissner 1980

Diagnosis: Body size 35 × 15 μm in protargol preparations; body fusiform, anterior and posterior body ends narrowly rounded. Macronuclear nodule spherical to elliptical, positioned at posterior half­body. Contractile vacuole at posterior body end. Cytoplasm colorless. Usually 10 somatic kineties, composed of dikinetid; spiraled. Extrusomes recognized in protargol preparation; along with somatic kineties. Feeding tube distinct, positioned at anterior body end. Paroral membrane semicircular.

Remark: The observation of the species belonging to the family Grossglockneriidae is first record from Korea. Their feeding tube is a diagnostic feature of the family (Foissner, 1993). The Korean population co­occurred with Nivaliella plana from the single sample out of 13 ones. Other species in Colpodea were commonly occurred days from the samples after the rewetting and we will report them with further investigation.

Voucher slides: Two slides including protargol­impregnated specimens have been deposited in the National Institute of Biological Resources in Korea (NIBRPR0000 107136, NIBRPR0000107137).