Diagnostic features
Pennate diatom, boat-shaped with rounded ends in valve view, rectangular with rounded ends in girdle view, with thickened silica underlying the central area. Similar to Eolimna, but the golden brown chloroplasts are H-shaped in healthy cells (vs two separate parietial chloroplasts, although they may degrade to that in older cells).
![[Sellaphora], X1000. Photo: Phil Novis, Manaaki Whenua Image](/assets/Tools-And-Resources/Identification/algae/sellaphora_phil1000__ScaleWidthWzEwMjRd.jpg)