T.E.R:R.A.I.N - Taranaki Educational Resource: Research, Analysis and Information Network


Invertebrates (Freshwater) New Zealand

Freshwater invertebrates (insects, crustaceans, snails, worms and other small critters) are often used as indicators of the state of streams, rivers, lakes and ponds. Thanks to James Cooper for the use of his photos and information on these groups of invertebrates.

Spiders & Mites: (9 jointed legs)
Insects and Springtails: (6 jointed legs)
Crustaceans: (more than 8 jointed legs)
Molluscs: (shells which are bivalves, snails, limpets)
Segmented worms: (paddleworms, leeches, oligochaete worms)
Usegmented worms: (flatworms, gordian, nematode, proboscis, rhabdocoeis worms)
Hydroids and Bryozoa: (tentacle-bearing) 
Sponges: (no tentacles)
True fly larvae: (Craneflies, midges, trueflies, mayflies)



Crustaceans: (more than 8 jointed legs)


Koura (Northern) Paranephrops planifrons


Koura (Southern) Paranephrops zealandicus



Flies: True fly larvae: (Craneflies, midges, trueflies, mayflies)


Caddisfly nymph (Genus: Aoteapsyche) Netspinning caddisfly nymph


Caddisfly nymph (Hydrobiosella mixta) Fingernet caddisfly nymph


Caddisfly nymph (Genus: Hydrobiosis) Free living caddisfly nymph


Caddisfly nymph (Genus Pycnocentrodes) Stony cased caddisfly nymph


Caddisfly nymph (Genus: Triplectides) Stick caddisfly nymphs


Cranefly nymph (Genus: Mischoderus)


Dobsonfly (Archichauliodes diversus) NZ dobsonfly


Dragonfly nymph (Antipodochlora braueri) Dusk dragonfly nymph


Mayfly nymph (Genus: Ameletopsis) Ameletopsis perscitus


Mayfly nymph (Genus: Coloburiscu) Coloburiscus humeralis


Mayfly nymph (Genus: Deleatidium) Single gill mayfly nymph


Mayfly nymph (Genus: Icthybotus)


Mayfly nymph (Genus: Oniscigaster) Swimming Mayfly nymph


Mayfly nymph (Genus: Zephlebia) Double gill mayfly nymph


Stonefly (Acroperla trivacuata)


Stonefly nymph (Genus: Austroperla) Austroperla cyrene


Stonefly nymph (Genus: Megaleptoperla) Megaleptoperla grandis


Stonefly nymph (Stenoperla prasina)


Stonefly nymph (Order: Zealandobius)


Water boatmen (Family: Corixidae)




Insects and Springtails: (6 jointed legs)


Beetle (Family: Elmidae) Riffle beetles


Beetle (Rhantus suturalis) Diving beetle



Mites: (9 jointed legs)


Mites (Water mites) Unranked Hydracarina



Molluscs: (shells which are bivalves, snails, limpets)


Snail (Freshwater) Family: Lymnaeidae


Snail (New Zealand mudsnail) Potamopyrgus antipodarum


Snail (Pond) Genus: Lymnaea




Spiders
(9 jointed legs)


Fishing spider (Dolomedes dondalei)


Nursery spider (Dolomedes minor)


Water spider (Dolomedes aquaticus)      






Worms

 

Worms (Horsehair worms) Phylum: Nematomorpha