Skip to content
Manaaki Whenua
Landcare Research
Publications
News
Events
Careers
About us
Contact us
Discover our research
Highlights
Research projects
Enhancing soils, water & land
Helping to manage our land and water resources wisely
Learn more
Related science
Erosion & sediment
Land & soil resources
Soil & ecosystem health
Restoring biodiversity; beating invasive species
Discovering, protecting and restoring our precious taonga
Learn more
Related science
Plants, invertebrates, fungi & bacteria
Species & ecosystem conservation
Weed biocontrol
Weed control in the Pacific
Animal pest management
Ecosystem resilience
Invasive invertebrates
Action on climate change
The major challenge of our generation
Learn more
Related research
Climate change adaptation & mitigation
Generative AI for climate adaptation
Huringa Āhuarangi, Huringa Oranga: Changing environment, changing wellbeing
Trees in landscapes
People & environment
Enabling New Zealand to make better environmental decisions
Learn more
Related science
Sustainable society & policy
Partner with us
Information for...
Iwi & Māori partners
Government & policy makers
Local & regional councils
Primary industries
Our science portfolios
Biota
Characterising land resources
Climate change adaptation & mitigation
Managing land and water
Plant biosecurity & biodiversity
Society, culture & policy
Wildlife management & conservation ecology
Our capabilities
Science & mātauranga Māori
International development
Business solutions
Toitū Envirocare
EcoGene: DNA-based diagnostics
Laboratories & diagnostics
Tools & resources
Get involved
NZ Garden Bird Survey
Survey of Rural Decision Makers
NZ Colony Loss Survey
Education
Teaching resources
Get involved
Identification
What is this bug?
Algae
Invertebrates
Plants
Fungi
Resources
National collections
Data & Databases
Mapping
Search
Search for…
within
All content
Case studies
Events
Factsheets
Files
Identification tools
Innovation stories
Laboratories
Maps
Media Releases
National Collections
News
Newsletters
People
Projects
Projects news
Publications
Research
Resources
Science portfolios
Tools
Search
Home
...
How to interpret the results
Indicator taxa
Natural wetlands
Scroll to
Diatoms
Green algae
Diatoms
Achnanthidium
(Achnanthidiaceae)
Central raphe
Factsheet
Eunotia
and relatives (Eunotiaceae)
Rotational symmetry of cell face outline is 360 degrees; one end is a reflection of the other
Factsheet
Fragilaria
(Fragilariaceae)
Chloroplasts visible inside cells are brown
Factsheet
Gyrosigma
(Pleurosigmataceae)
Rotational symmetry of cell face outline 180 degrees, with the ends being opposite reflections of each other
Factsheet
Naviculoid diatoms (Naviculaceae)
Central raphe
Factsheet
Nitzschia
(Bacillariaceae)
Rotational symmetry of cell face outline 180 degrees, with the ends being opposite reflections of each other
Factsheet
Pinnularia
(Pinnulariaceae)
Central raphe
Factsheet
Ulnaria
(Fragilariaceae)
Raphe absent
Factsheet
Green algae
Chara
(Characeae)
Structured as a main axis with whorls of branches at nodes
Factsheet
Cladophora glomerata
(Cladophoraceae)
Filaments are one cell wide
Factsheet
Closterium
(Closteriaceae)
Cell outline crescent-shaped
Factsheet
Cosmarium
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Desmidium
(Desmidiaceae)
Cells have constrictions between them
Factsheet
Euastrum
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Hyalotheca
(Desmidiaceae)
Cells have constrictions between them
Factsheet
Micrasterias
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Mougeotia
(Zygnemataceae)
Cell wall is smooth and featureless
Factsheet
Nitella
(Characeae)
Structured as a main axis with whorls of branches at nodes
Factsheet
Pleurotaenium
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Spirogyra
(Zygnemataceae)
Cell wall is smooth and featureless
Factsheet
Spondylosium
(Desmidiaceae)
Cells have constrictions between them
Factsheet
Staurastrum
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Staurodesmus
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Xanthidium
(Desmidiaceae)
Cell outline has a deep constriction
Factsheet
Zygnema
(Zygnemataceae)
Cell wall is smooth and featureless
Factsheet