Landcare Research - Manaaki Whenua

Landcare-Research -Manaaki Whenua

Navicula tairuaensis Foged

Type slide

Coast at Tairua, Coromandel Peninsula, North Island, New Zealand. Foged Collection, New Zealand No. 489/1966, Natural History Museum, Denmark.

Institution holding the type material


Known distribution

Coromandel, North Island, New Zealand.


From Tairua.


Elliptical to elliptic-lanceolate valves with broadly rounded apices, now and then faintly protracted, 25-40 µm long and 10-12 µm broad. Linear axial area, the central area transversely dilated till about the half width of the valve. The transapical striae are radiate, but towards the apices at right angles to the raphe or gently convergent, 10-12 in 10 µm. In the middle of the valve they are alternately longer and shorter.

Description reproduced with kind permission from Koeltz Scientific Books.


Material corresponding to that illustrated by Foged (1979) was not located on the type slide. Furthermore, the illustrations did not convincingly represent a single species. This taxon may therefore be questionable.

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


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