Johanseninema constrictum (Szafer) Hasler et al.

West Spitsbergen island, horth coast of the Hornsund bay, Rewatnet lake and lakes, ponds and shallow pools and the Revvatnet lake in the Revdalen valley. Samples were collected on the shallow bottom at the banks of waterbodies from stones and sand).

West Spitsbergen island. North coast of the Hornsund bay, Revdalen valley. Подножие склона горы Арикаммен (Ariekammen Mountain). Ровная морская терраса (Fuglebergsletta plain of raised marine terrace). Мезотрофная влажная моховая тундра (mesotrophic moist moss−tundra composed of: Calliergon sarmentosum community, Tetraplodon mnioides community and Saxifraga hyperborea, Ranunculus spitsbergensis community). Небольшие водоемы. Algae were collected in shallow pools and from erosive surfaces on a thin peat layer filled with stagnant water of the depth ±5–10 cm.

Полярный Урал. Озеро Щучье. Планктон, бентос, вневодные.

Река Барнаулка, 91,0 км от устья (у с. Зимино), планктон, обрастания кладофоры, 13.08.1999, t = 17,9 °C;