Landcare Research - Manaaki Whenua

Landcare-Research -Manaaki Whenua

Navicula cassieana Foged

Navicula cassieana; image by Cathy Kilroy (NIWA)

Type slide

Lake Waikaremoana, North Island, New Zealand. Foged Collection, New Zealand No. 634/1966, Museum of Natural History, Denmark.

Institution holding the type material


Known distribution

Lake Waikaremoana, New Zealand


Dedicated to the New Zealand biologist Vivienne Cassie.


Valves broadly elliptic-lanceolate with slightly protracted apices, 25-30 µm long and 10-13 µm broad. Raphe straight filiform with terminal fissures deflected in the same direction. Narrow linear axial area and small central area. 8-10 transapical striae in 10 µm, radiate and punctate.

Description reproduced with kind permission of Koeltz Scientific Books.


Images published online with kind permission of the Natural History Museum of Denmark.

Funding from TFBIS (Terrestrial and Freshwater Biodiversity Information System), administered by the New Zealand Department of Conservation, is gratefully acknowledged.


1 Foged N 1979. Diatoms in New Zealand, the North Island. A. R. Gantner Verlag KG, Vaduz. 130 p.