As of July 2016, the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ...

(IUCN) lists 2875 data deficient

arthropod Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and cuticle made of chiti ...

species. 30% of all evaluated arthropod species are listed as data deficient. The IUCN also lists 17 arthropod subspecies as data deficient. No subpopulations of arthropods have been evaluated by the IUCN. This is a complete list of data deficient arthropod species and subspecies as evaluated by the IUCN.

Arachnids

Branchiopoda Branchiopoda is a class of crustaceans. It comprises fairy shrimp, clam shrimp, Diplostraca (or Cladocera), Notostraca and the Devonian ''Lepidocaris''. They are mostly small, freshwater animals that feed on plankton and detritus. Description ...

*'' Streptocephalus kargesi''

Millipedes Millipedes are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derived from this feature. Each double-legged segment is a resu ...

Maxillopoda Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can ...

Maxillopoda includes barnacles, copepods and a number of related animals. There are 22 species in the class Maxillopoda assessed as data deficient.

Sessilia

*'' Armatobalanus nefrens'' *''

Balanus aquila ''Menesiniella aquila'' is a species of acorn barnacle in the family Balanidae. It is found off the California coast from San Francisco to San Diego from the bottom of the intertidal zone down to depths of 18 m. It is preyed upon by fish, ...

Calanoida

There are 19 species in the order Calanoida assessed as data deficient.

Diaptomids

Temorids

*'' Epischura massachusettsensis''

Harpacticoida Harpacticoida is an order of copepods, in the subphylum Crustacea. This order comprises 463 genera and about 3,000 species; its members are benthic copepods found throughout the world in the marine environment (most families) and in fresh water ( ...

*'' Thermomesochra reducta''

Xiphosura Xiphosura () is an order of arthropods related to arachnids. They are more commonly known as horseshoe crabs (a name applied more specifically to the only extant family, Limulidae). They first appeared in the Hirnantian ( Late Ordovician). Curr ...

Malacostracans

Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 1130 malacostracan species and 17 malacostracan subspecies assessed as data deficient.

Isopods Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and ...

*'' Echinodillo cavaticus'' *'' Styloniscus sp. nov.''

Decapods The Decapoda or decapods (literally "ten-footed") are an order (biology), order of crustaceans within the class Malacostraca, including many familiar groups, such as crabs, lobsters, crayfish, Caridea, shrimp and Dendrobranchiata, prawns. Most ...

There are 1128 decapod species and 17 decapod subspecies assessed as data deficient.

Parastacids

Gecarcinucids

Atyids

Species Subspecies

Cambarids

Potamonautids

Pseudothelphusids

Potamids

Palaemonids

Species Subspecies

Trichodactylids

Spiny lobsters

Lobsters Lobsters are a family (Nephropidae, synonym Homaridae) of marine crustaceans. They have long bodies with muscular tails and live in crevices or burrows on the sea floor. Three of their five pairs of legs have claws, including the first pair, ...

Slipper lobsters

Reef lobsters

Other decapod species

Insects Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of j ...

There are 1702 insect species assessed as data deficient.

Blattodea Blattodea is an order of insects that contains cockroaches and termites. Formerly, termites were considered a separate order, Isoptera, but genetic and molecular evidence suggests they evolved from within the cockroach lineage, cladistically ...

*'' Miriamrothschildia zonatus''

Orthoptera

There are 50 species in the order Orthoptera assessed as data deficient.

Acridids

Tettigoniids

Phaneropterids

Other Orthoptera species

Hymenoptera

There are 316 species in the order Hymenoptera assessed as data deficient.

Colletids

Melittids

Apids

Halictids

Andrenids

Megachilids

Mantises Mantises are an order (Mantodea) of insects that contains over 2,400 species in about 460 genera in 33 families. The largest family is the Mantidae ("mantids"). Mantises are distributed worldwide in temperate and tropical habitats. They hav ...

Other Lepidoptera species

Beetles

There are 377 beetle species assessed as data deficient.

Geotrupids

Longhorn beetles The longhorn beetles (Cerambycidae), also known as long-horned or longicorns, are a large family of beetles, with over 35,000 species described. Most species are characterized by extremely long antennae, which are often as long as or longer than ...

Other beetle species

Odonata Odonata is an order of flying insects that includes the dragonflies and damselflies. Members of the group first appeared during the Triassic, though members of their total group, Odonatoptera, first appeared in Late Carboniferous. The two com ...

Odonata includes dragonflies and damselflies. There are 868 species in the order Odonata assessed as data deficient.

Other Odonata species

References

*Arthropods Data deficient arthropods Data deficient arthropods {{bots, deny=BG19bot,Yobot