Five newly recorded species of cyanobacteria in Korea Author Kim, So-Won Author Lee, Nam-Ju Author Kim, Do-Hyun Author Song, Ji-Ho Author Lee, Hye-Ryeung Wang and Ok-Min omlee@kgu.ac.kr text Journal of Species Research 2022 11 4 296 309 journal article 10.12651/JSR.2022.11.4.296 2713-8615 13138770 Tolypothrix carrinoi Miscoe, Pietrasiak and J.R. Johansen, 2016 ( Fig. 3 , Table 2 ) Filaments straight, heteropolar, with rare single and double false branching. Trichomes slightly to distinctly constricted at the cross-walls. Sheaths thin, colorless, clearly visible when cells are absent. Cells blue-green in color, compressed disc-like to shorter than wide when rapidly dividing, becoming barrel-shaped to cylindrical and longer than wide in old cultures, with finely granular, 11.1-13.3 μm wide, 4.1-12.8 μm long. Apical cells hemispherically rounded. Heterocytes spherical, located in filaments basal, one to three in a series, 11.2-14.0 μm wide, 9.6-12.5 μm long. Ecology. Dry wall exposed to sunlight in the sinkhole of a cave ( Miscoe et al. , 2016 ), on tree bark in Korea . Distribution. Hawaii ( Miscoe et al. , 2016 ). Site collection. Iui-dong , Yeongtong-gu , Suwon-si , Gyeonggi-do ( 37°18′17.9″N / 127°02′05.3″E ) . Date of collection. February 14, 2019 . Order Synechococcales Hoffmann, Komárek and Kastovsky, 2005 Family Leptolyngbyaceae Komárek, J. Kastovsky, Mareš and J.R. Johansen, 2014 Genus Myxacorys Pietrasiak and J.R. Johansen, 2019 Filaments wavy, olive green in color, often form false branching. Trichomes straight, sometimes twisted, slightly constricted at the cross-walls. Sheaths colorless, thin. In young cultures, filaments with single trichome without sheaths, and later with one to two trichomes in a sheath. Cells shorter than wide to isodiametric, occasionally longer than wide when stressed. Apical cells rounded to conical, sometimes forming irregularly shaped involution cells. Hormogonia widened at one end, tapering toward the opposite end. Slime caps lack in young cultures, and present in old cultures. Calyptra absent.