Species (sp.): Tetraedron sp.

VANDA: Planteplankton 1991-05-23 Sogndal vidaregåande skule Svartaholtjørnet (Vestland, Norway) Vis heile registreringa	Closterium sp. Cosmarium spp. Dinobryon crenulatum Dinobryon divergens Melosira sp. Merismopedia glauca Micrasterias rotata Oscillatoria sp. Spondylosium sp. Tabellaria fenestrata Tabellaria flocculosa Tetraedron sp. Xanthidium sp.
VANDA: Planteplankton 1991-10-14 Hamar katedralskole Stavsjø (Innlandet, Norway) Vis heile registreringa	Anabaena sp. Ankistrodesmus falcatus Asterionella formosa Aulacoseira granulata Ceratium hirundinella Dinobryon crenulatum Elakatothrix sp. Fragilaria crotonensis Gomphosphaeria sp. Mallomonas sp. Merismopedia sp. Microcystis sp. Monoraphidium cf. arcuatum Nitzschia sp. Oocystis sp. Pediastrum boryanum Quadrigula sp. Scenedesmus sp. Staurastrum sp. Tabellaria flocculosa Tetraedron sp.
VANDA: Planteplankton 1991-06-03 Oppegård videregående skole Kolbotnvannet (Akershus, Norway) Vis heile registreringa	Anabaena sp. Ankistrodesmus sp. Closterium sp. Coelastrum sp. Cyclotella sp. Fragilaria crotonensis Fragilaria sp. Oscillatoria sp. Pandorina sp. Scenedesmus ecornis Scenedesmus sp. Staurastrum sp. Tetraedron sp.
VANDA: Planteplankton 1991-06-10 Midt-Østerdal videregående skole/Koppang Kjemsjøen (Innlandet, Norway) Vis heile registreringa	Bitrichia chodatii Crucigenia tetrapedia Dinobryon bavaricum Dinobryon crenulatum Eudorina sp. Mallomonas sp. Microcystis spp. Nephrocytium sp. Peridinium sp. Rhodomonas lacustris Tabellaria flocculosa Tetraedron sp.