CLASSIFICATION AND NOMENCLATUR

They were first discovered in the 1820s by Dr. Anton E. Sauter in Lake Zeller, Austria. The genus Aegagropila was established by Kützing (1843) with A. linnaei as the type species based on its formation of spherical aggregations, but all the Aegagropila species were transferred to subgenus Aegagropila of genus Cladophora later by the same author (Kützing 1849). Subsequently, A. linnaei has been accommodated in the genus Cladophora in the Cladophorales and has been renamed Cladophora aegagropila (L.) Rabenhorst and Cl. sauteri (Nees ex Kütz.) Kütz. Extensive DNA research in 2002 returned the name to Aegagropila linnaei. The presence of chitin in the cell walls makes it distinct from the genus Cladophora.

The plant was named "marimo" by a Japanese botanist Tatsuhiko Kawakami in 1898 (Meiji 31). Mari is a bouncy play ball. Mo is a generic term for plants that grow in water. The native names in Ainu are to-rasampe (lake goblin) and to-karip (lake roller).[1] They are sometimes sold in aquaria under the name "Japanese moss balls" although they are unrelated to moss. In Iceland the lake balls are called kúluskítur by the local fishermen at Mývatn (kúla = ball. skítur = muck) where the "muck" is any weeds that get entangled in their fishing nets. The scientific name Aegagropila  is Greek for "goat hair".