Rhizosolenia sp.

Systematics :

Kingdom: Chromista
Phylum: Diatoms (Bacillariophyta)
Class: Bacillariophyceae
Order: Centrales
Suborder: Rhizosoleniineae
Family: Rhizosoleniaceae
Genus: Rhizosolenia
Species (sp.): Rhizosolenia sp.