Publication
Not available online
Known distribution
New Zealand
North Island, New Zealand.
Etymology
From Lake Opoura.
Description
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.
Notes
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.
Reference
Foged N 1979. Diatoms in New Zealand, the North Island. A. R. Gantner Verlag KG, Vaduz. 130 p.
![[Pinnularia opouraensis]. Image: Cathy Kilroy (NIWA) Image](/assets/Tools-And-Resources/Identification/Diatoms/SNAP-162149-0016__ScaleWidthWzEwMjRd.jpg)
![[Pinnularia opouraensis]. Image: Cathy Kilroy (NIWA) Image](/assets/Tools-And-Resources/Identification/Diatoms/SNAP-162209-0017__ScaleWidthWzEwMjRd.jpg)
![[Pinnularia opouraensis]. Image: Cathy Kilroy (NIWA) Image](/assets/Tools-And-Resources/Identification/Diatoms/SNAP-162814-0018__ScaleWidthWzEwMjRd.jpg)
![[Pinnularia opouraensis]. Image: Cathy Kilroy (NIWA) Image](/assets/Tools-And-Resources/Identification/Diatoms/SNAP-162824-0019__ScaleWidthWzEwMjRd.jpg)
![[Pinnularia opouraensis]. Image: Cathy Kilroy (NIWA) Image](/assets/Tools-And-Resources/Identification/Diatoms/SNAP-163808-0024__ScaleWidthWzEwMjRd.jpg)