Gonostomum lajacola Foissner, 2016

Min, Kang-San Kim and Gi-Sik, 2018, Brief morphological description of stichotrichid ciliates (Ciliophora: Stichotrichia) from Korea, Journal of Species Research 7 (4), pp. 323-332 : 325-326

3. Gonostomum lajacola Foissner, 2016 ( Fig. 3 )

Material examined. Soil sample from Wangsan-ri, Jung-gu, Incheon, Korea (37°26ʹ47ʺN, 126°23ʹ40ʺE), on February 2018 .

Diagnosis. Cell size 70-95 × 25-40 μm in protargol preparations; 33-40 adoral zone of membranelles; cortical granules present, colorless; 2 macronuclear nodules with 2 or 3 micronuclei; 3 frontal cirri; 2 frontoterminal cirri; 1 buccal cirrus; 17-24 paroral; 2 or 3 frontoventral cirral pairs; 6 or 7 pretransverse and transverse cirri; 1 left (10-14 cirri) and 1 right (20-23 cirri) marginal cirral row; 3 dorsal kineties; 3 caudal cirri.

Remarks. Gonostomum lajacola is highly similar to three congeners, G. bromelicola , G. fraterculus , and G. singii ( Foissner, 2016) . Gonostomum bromelicola and G. fraterculus can be separated from G. lajacola by numbers of frontoventral (4 vs. 5-7), and transverse cirri (invariably 5 vs. 4 or 5). Furthermore, G. bromelicola has a distinct break in dorsal kinety 2 (vs. no break). Gonostomum singii differs from G. lajacola by cortical granules (sparse vs. dense) and the number of frontoventral cirral pairs (2 vs. variably 2 or 3) ( Foissner, 2016).

Deposition. One slide ( NNIBR2018113 IV1939) has been deposited at the Nakdonggang National Institute of Biological Resources ( NNIBR), Korea .

Figures

Fig. 3. Photomicrographs of Gonostomum lajacola from life (A) and after protargol impregnation (B-D). (A-C) Ventral views. (D) Dorsal view. Scale bars=50 μm.