Landcare Research - Manaaki Whenua

Landcare-Research -Manaaki Whenua

Pinnularia opouraensis Foged

Pinnularia opouraensis; image by Cathy Kilroy (NIWA)

Type slide

Swamp near Lake Opoura, North Island, New Zealand. Foged Collection, New Zealand No. 527/1966, Natural History Museum, Denmark.

Institution holding the type material


Known distribution

North Island, New Zealand.


From Lake Opoura.


The valves are elliptic-lanceolate with rather narrowly protracted rounded apices, 20-25 µm long and 7 µm broad. The axial area is broadly lanceolate towards the central area that is broad and dilated to the margins of the valve. The raphe is straight with dense central pores. The transapical striae, 12-14 in 10 µm, are radiate towards the middle of the valve, but convergent towards the apices.

Description reproduced with kind permission from 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.