As of July 2016, the International Union for Conservation of Nature (IUCN) lists 2875 data deficient arthropod species.^[1] 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.

• Streptocephalus kargesi

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

• Armatobalanus nefrens
• Balanus aquila

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

• Epischura massachusettsensis

• Thermomesochra reducta

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

• Echinodillo cavaticus
• Styloniscus sp. nov.

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

Species

Subspecies

Species

Subspecies

There are 1702 insect species assessed as data deficient.

• Miriamrothschildia zonatus

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

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

Lepidoptera comprises moths and butterflies. There are 87 species in the order Lepidoptera assessed as data deficient.

There are 377 beetle species assessed as data deficient.

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

• Lists of IUCN Red List data deficient species
• List of least concern arthropods
• List of near threatened arthropods
• List of vulnerable arthropods
• List of endangered arthropods
• List of critically endangered arthropods
• List of recently extinct arthropods