Arachnida
Araneae, Opiliones, Pseudoscorpiones, Scorpions, Solifugae, Ticks and Mites, The Tarantula's Burrow
Crustacea
Branchiopoda, Cirripedia, Copepoda, Malacostraca, Ostracoda, Crustacea of Cuatro Cienegas, Mexico, Crustacea.Net, Crustaceans of Southern Australia, IV Taller - Brachyura, Land Crabs of the Seychelles islands, Marine Crustaceans of Southern Australia, Nonindigenous Crustaceans, The Crustacean Society, The Plankton Net, Tree of Life - Crustacea
Insecta
Archaeognatha, Cockroaches, Coleoptera, Collembola, Dermaptera, Diplura, Diptera, Ephemeroptera, Fleas, Hemiptera
Merostomata
Merostomata, The Horseshoe Crab - Limulus polyphemus, The Horseshoe Crab - Limulus polyphemus
Pycnogonida
All About Sea Spiders (Pycnogonida), Class Pycnogonida (Sea Spiders), Introduction to the Pycnogonida, Jason Dunlop - Research Interests, Pantopoda 1789-1995, Sea Slug Predators - Pycnogonids (Sea Spiders), Sea Spiders: Class Pycnogonida
Arthropoda
Phylogeny, bibliography, and links from the Tree of Life Project.
Brisbane Insects and Spiders
Photos and notes on insects and spiders in Brisbane, Australia.
BugGuide.Net
An online resource devoted to insects, spiders and their kin, with identification help, images, and information.
Bugs in Cyberspace
Images and information on many species of arthropods. Sections on phasmids, mantids, beetles, scorpions, and US invertebrates.
Canadian National Collection of Insects, Arachnids
Information on the 16 million specimens contained in the collection, plus curatorial units and staff. Links to on-site entomology and arachnology documentation, and other relevant web sites.
Cirrus Digital Imaging
Gallery of close-up photos of common North American arthropods.
Common Insects of Texas
Gallery of 381 images of insects and other arthropods.
Herper.com: Invertebrates
Articles and links related to insects, arachnids, and other invertebrates.
Identification of Insects
An overview of morphological features of the different Classes of arthropods and Orders of insects, with photos of Italian arthropods by Alessandro Strano.
Insectisite
Pictures of insects and spiders of the Netherlands.
Insects and More
Image galleries of butterflies, odonates, other insects, and other arthropods from Texas.
Insects of Ojibway Prairie, Windsor, Ontario
Photo galleries and information on spiders, chiggers, mayflies, fireflies, dragonflies, butterflies, moths, leafhoppers and other invertebrates of urban areas, wetlands, prairies, and woodlands.
Introduction to the Arthropoda
The Arthropods, the largest animal phylum, includes insects, spiders, crustaceans, and others. Comprehensive information from UC-Berkeley website.
Introduction to the Cheliceramorpha
About the arthropod order that includes spiders and scorpions, mites and ticks, horseshoe crabs, and daddy-longlegs. Cheliceramorpha includes spiders and scorpions, mites and ticks, horseshoe crabs, daddy-longlegs, and extinct "sea-scorpions."
Iowa State University Entomology Image Gallery
A large collection of photographs and movies of insects and other arthropods and they damage they cause. Includes links to accompanying articles.
Natural Perspective
Phylum Arthropoda (Joint-Legs)
Phylum Arthropoda
Philip Myers's introduction to Phylum Arthropoda, from the Animal Diversity Web.
Reference Library of Digitized Insect Sounds
Audio samples organized by both species and subject.
TIARA
Collaborative biological information system for the insects and terrestrial arthropods of the south-central United States and adjacent Mexico. Classification, range maps, taxon lists, images, Texas A and M University holdings, and links.