This list of invertebrates of California lists invertebrate species (animals without a backbone) found in the U.S. state of California. This list includes animals from land, freshwater, and the ocean. The phyla are listed in alphabetical order. Species that are endemic to the State of California are indicated using an [e], introduced species with an [i], and invasive species with an [n].
Acanthocephala
Acoelomorpha
Annelida Many of these species were described by Hulton Wood and Samuel James.
Class Polychaeta
Arthropoda Subphylum Crustacea
Class Branchiopoda
Order Anostraca
Family Branchinectidae, fairy shrimp
Order Notostraca, tadpole shrimp
Order Anomopoda water fleas
Class Hexanauplia
Class Malacostraca
Order Decapoda, decapods
Order Isopoda, isopods
Suborder Oniscidea, woodlice
Order Amphipoda, amphiopods
Class Insecta California has over 30,000 insects in the entire state.
Order Coleoptera
Family Carabidae, ground beetles
Family Cerambycidae, longhorn beetles
Family Scarabaeidae, scarabs
Order Collembola, springtails
Order Dermaptera, earwigs
Order Dictyoptera
Order Diptera, flies and mosquitoes
Order Embiidina, webspinners and footspinners
Order Ephemeroptera
Order Grylloblattidae
Order Hemiptera
Family Macroveliidae
Family Pentatomidae
Family Saldidae, shorebugs
Order Hymenoptera, sawflies, bees, wasps, and ants
Order Isoptera, termites
Order Lepidoptera, butterfiles and moths
Family Hesperiidae, skippers
Family Nymphalidae
Family Lycaenidae, gossamer-winged butterflies
Family Riodinidae, metalmarks
Family Sphingidae, hawk moths, sphinx moths
Family Papilionidae, hawk moths, sphinx moths
Order Mallophaga, bird lice, biting lice
Order Mecoptera, scorpionflies
Order Neuroptera
Order Odonata, dragonflies and damselflies
Suborder Anisoptera
Family Libellulidae
Suborder Zygoptera
Subfamily Coenagrionoidea
Order Orthoptera, grasshoppers, katydids, and crickets
Order Phasmida
Order Phthiraptera, lice
Order Plecoptera, stoneflies
Order Protura
Order Psocoptera booklice, bark lice
Order Siphonaptera fleas
Order Siphunculata
Order Strepsiptera
Order Trichoptera caddisflies
Order Thysanoptera thrips
Class Arachnida
Superorder Acari, ticks and mites
Order Amblypygi, tailless whipscorpions
Order Araneae, spiders
Order Opiliones, harvestmen
Order Palpigradi, micro whipscorpions
Order Pseudoscorpiones, pseudoscorpions
Order Ricinulei, hooded tickspiders
Order Schizomida, shorttailed whipscorpions
Order Scorpiones, scorpions
Order Solifugae, camel spiders
Order Uropygi, whipscorpions
Subclass Myriopoda
Brachiopoda
Order Stenolaemata Narrow throat bryozoans
Order Terebratulida
Bryozoa
Class Gymnolaemata
Class Phylactolaemata freshwater bryozoans
Class Stenolaemata
Chaetognatha
Chordata Subphylum Urochordata
Class Ascidiacea
Order Enterogona
Order Stolidobranchia
Order Phlebobranchia
Class Thaliacea
Cnidaria
Class Scyphozoa, true jellyfish
Class Hydrozoa
Class Anthozoa, sea anemones and corals
Order Actiniaria
Order Pennatulacea
Ctenophora
Class Tentaculata tentaculate comb jellies
Class Nuda
Cycliophora
Echinodermata
Class Asteroidea, sea stars
Class Ophiuroidea, brittle stars
Class Echinoidea, sea urchins and sand dollars
Echiura
Entoprocta
Gastrotricha
Order Chaetonotida
Order Macrodasyida
Gnathostomulida
Hemichordata
Kinorhyncha
Loricifera
Order Nanaloricida
Micrognathozoa
Mollusca
Class Bivalvia, bivalves
Order Mytilida
Order Ostreida
Order Venerida
Order Myida
Class Gastropoda, gastropods
Order Archaeogastropoda
Order Pulmonata
Order Stylommatophora
Order Nudibranchia
Order Neotaenioglossa
Order Neogastropoda
Order Trochida
Order Littorinimorpha
Superfamily Aplysioidea
Order Cephalaspidea, shieldheaded slugs
Superfamily Cerithioidea
Class Cephalopoda, cephalopods
Subclass Coleoidea
Order Octopoda
Order Myopsida
Class Polyplacophora
Mesozoa
Nematoda
Nematomorpha
Nemertea
Class Anopla
Class Enopla
Class Hoplonemertea
Class Palaeonemertea
Class Pilidiophora
Onychophora
Pentastoma
Phoronida
Placozoa
Platyhelminthes
Class Cestoda
|}
Class Turbellaria
Pogonophora
Porifera
Class Demospongiae
Subclass Tetractinomorpha
Order Astrophorida
Order Hadromerida
Order Spirophorida
Subclass Ceractinomorpha, demosponges
Order Poecilosclerida
Suborder Myxillina
Priapulida
Rotifera
Sipuncula
Tardigrada
Class Heterotardigrada
Xenacoelomorpha
Notes
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