Facts and Figures: Venomous Animal Tree
The following tree gives a rough idea of the relationships between animal groups, particularly those which have venomous species. It is not a comprehensive list of groups, as that would be very large. Rather, the major and more well-known groups are shown. Venomous animals (only those which are regarded as dangerously venomous to humans) are shown in red. Following a link will take you to more information on that group.
| Animalia | |||||
 | Porifera (sponges) | ||||
| Cnidaria | ||||
 | | Anthozoa (sea anemones) | |||
| | Cubozoa (box jellyfish, Chiropsalmus, irukandji, jimble, morbakka) | |||
| | Hydrozoa (hydrozoans, bluebottle) | |||
|  | Scyphozoa (hair jelly, blubber, moon jelly) | |||
| Ctenophora (comb jellies) | ||||
| Bilateria | ||||
 | | Annelida (worms) | |||
| | | Polychaeta (bristle worms, fireworms) | ||
| | | Oligochaeta (earthworms) | ||
| | | Hirudinea (leeches) | ||
| | Mollusca | |||
| | | Polyplacophora (chitons) | ||
| | | Bivalvia (mussels, clams) | ||
| | | Gastropoda (snails, cone snails) | ||
| | | Cephalopoda (cuttlefish, squids, octopi, blue-ringed octopus) | ||
| | Brachiopoda | |||
| | Bryozoa | |||
| | Nemertea | |||
| | Rotifera | |||
| | Platyhelminthes (flatworms) | |||
| | Chaetognatha | |||
| | Onychophora (velvet worms) | |||
| | Tardigrada (water bears) | |||
| | Nematoda (roundworms) | |||
| | Nematophora | |||
| | Arthropoda (joint-legged invertebrates) | |||
| | | Insecta | ||
| | | | Dermaptera (earwigs) | |
| | | | Siphonaptera (fleas) | |
| | | | Hemiptera (bugs) | |
| | | | Orthoptera (grasshoppers, crickets) | |
| | | | Lepidoptera (butterflies, moths) | |
| | | | Coleoptera (beetles) | |
| | | | Diptera (flies, mosquitoes) | |
| | | | Hymenoptera (ants, bees, wasps) | |
| | | Crustacea (crabs, lobsters, slaters) | ||
| | | Diplopoda (millipedes) | ||
| | | Chilopoda (centipedes) | ||
| | | Xiphosura (horseshoe crabs) | ||
| | | Pycnogonida (sea spiders) | ||
| | | Arachnida | ||
| | | | Opiliones (harvestmen) | |
| | | | Aranaea (spiders) | |
| | | | | Mygalomorphae (primitive spiders) |
| | | | | Araneomorphae (advanced spiders) |
| | | | Scorpiones (scorpions) | |
| | | | Acari (mites, ticks) | |
| | Deuterostomia | |||
| | | Echinodermata | ||
| | | | Crinoidea (feather stars) | |
| | | | Ophiuroidea (brittle stars) | |
| | | | Asteroidea (starfish) | |
| | | | Holothuroidea (sea cucumbers) | |
| | | | Echinoidea (sea urchins) | |
| | | Urochordata (sea squirts, cunjevoi) | ||
| | | Vertebrata | ||
| | | | Chondrichthyes (sharks, rays) | |
| | | | Osteichthyes (bony fish) | |
| | | | Aves (birds) | |
| | | | Amphibia (frogs, salamanders) | |
| | | | Reptilia (reptiles) | |
| | | | | Squamata (lizards, snakes) |
| | | | | Testudinata (turtles, tortoises) |
| | | | | Crocodylia (crocodiles, alligators) |
| | | | Mammalia (mammals) | |
| | | | | Monotremata (platypus, echidnas) |
| | | | | Marsupalia (kangaroos, possums, koala, quolls) |
| | | | | Eutheria (placental mammals) |