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Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Opiliones
Suborder: Eupnoi
Superfamily: Caddoidea
Family: Caddidae
Banks, 1892
see text
6 genera, 21 species

Caddidae is a family of harvestmen arachnids with 15 known species, the only family of the Eupnoi superfamily Caddoidea.

They have mostly a body length between one and three millimeters.[1]


Caddids are widely but discontinuously distributed. In the subfamily Caddinae, Caddella is endemic to southern South Africa, while Caddo is found in eastern North America and Japan with the Kuril Islands. In the other subfamily, Acropsopilioninae, Hesperopilio occurs in western Australia and Chile, Acropsopilio is found in Japan, eastern North America, Central to South America, eastern Australia and New Zealand. Austropsopilio is found in eastern Australia, Tasmania and Chile. This complex pattern suggests that separation occurred in several steps: during the Neogene (eastern North America and Japan); at the beginning or before the Tertiary (South America and Australia), and during the time of Gondwana (Africa and Australia).[1]


The family name is derived from "Caddo", a North American indigenous culture, people and language.[1]


        • Caddella spatulipilis Lawrence, 1934
        • Caddella caledonica Lawrence, 1934
    • Caddo Banks, 1892 (eastern North America, Japan)
    • Acropsopilio Silvestri, 1904 (Japan, eastern North America, Central to South America, eastern Australia, Chile)


  1. ^ a b c Pinto-da-Rocha, Ricardo & Gruber, Jürgen (2007): Caddidae Banks, 1893. In: Pinto-da-Rocha et al.. 2007: 115ff


  • Joel Hallan's Biology Catalog: Caddidae
  • Pinto-da-Rocha, R., Machado, G. & Giribet, G. (eds.) (2007): Harvestmen - The Biology of Opiliones. Harvard University Press ISBN 0-674-02343-9