Riddells Creek - Invertebrates and Insects

INVERTEBRATES (no backbone)
Insecta (Insects)
Arachnida (Arachnids)
Malacostraca (Crustaceans)
Myriapoda (Myriapods)
Gastropoda (Gastropods)
Annelida (Annelids)
3 pairs of legs
4 pairs of legs
more than 4 pairs of legs, usually less than nine
9 pairs of legs or more
no legs, soft body, no body segments
no legs, soft body, body segmented
bees, beetles, flies, ants, cockroaches, grasshoppers, butterflies, moths, wasps
spiders, scorpions, mites, ticks
yabbies, slaters/woodlice
millipedes, centipedes
snails, slugs
worms, leeches

Insects are by far the largest class of invertebrates. Insects are split in the following way.

Apterygotes: Wingless
Archaeognatha Bristletails
Thysanura Silverfish
Pterygotes: Mostly Winged in the Adult Stage
Expterygota: External wing development, & the immature stages (nymphs/instars) are similar to the adults (ie. not larvae).
Ephemeroptera Mayflies
Odonata Dragonflies & Damselflies
Plecoptera Stoneflies
Blattodea Cockroaches
Isoptera Termites
Mantodea Praying Mantis
Dermaptera Earwigs
Orthoptera Grasshoppers & Crickets
Phasmatodea Stick & Leaf Insects
Embioptera Web-spinners & Embiids
Psocoptera Booklice
Phthiraptera Lice
Hemiptera True Bugs, Cicadas, Hoppers, Aphids & Scale Insects
Thysanoptera Thrips
Endopterygota: Internal wing development, & the immature stages are different to the adults (larvae), including a pupal stage.
Megaloptera Alderflies & Dobsonflies
Neuroptera Lacewings & Antlions
Coleoptera Beetles
Strepsiptera Stylopids
Mecoptera Scorpion Flies
Siphonaptera Fleas
Diptera Flies
Trichoptera Caddis-flies
Lepidoptera Moths & Butterflies
Hymenoptera Bees, Ants, Wasps & Sawflies

More information on insects & other invertebrates.
Good book about insects: "A Field Guide to Insects in Australia" by Paul Zborowski & Ross Storey.