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Fumontana deprehendor (Marshal Hedin).jpg
Fumontana deprehendor
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Opiliones
Suborder: Laniatores
Superfamily: Triaenonychoidea
Family: Triaenonychidae
Sørensen in L. Koch, 1886
c. 120 genera, > 440 species

The Triaenonychidae are a family of harvestmen with about 120 genera and more than 440 described species.


Most Triaenonychidae are from three to five millimeters long, although some species from South Africa can be only 1 millimetre (0.039 in) long. Some species in the subfamily Adaeinae are almost 10 mm (0.39 in) long. Legs are almost always short, measuring 4–12 mm (0.16–0.47 in). The armed pedipalps are large, and much stronger than the legs.[1]


Triaenonychidae are found in North and South America, Japan and Korea, Australia and New Zealand, and Madagascar.[1]


The Triaenonychidae should probably split into at least two families. The genera from the Australian region are considered Triaenonychidae sensu stricto, and may include the strange Synthetonychiidae; the northern species should be grouped with Travuniidae.[1]


The name of the type genus Triaenonyx is combined from Ancient Greek τρίαινα (triaina, "trident, fish spear") and ὄνυξ (onyx, "claw").[1]


The following genera are included in the family:[2]

Triaenonychinae Sørensen in L. Koch, 1886
Kaolinonychinae Suzuki, 1975
Nippononychinae Suzuki, 1975
Paranonychinae Briggs, 1971
Sclerobuninae Dumitrescu, 1976
Soerensenellinae Forster, 1954


  1. ^ a b c d Adriano B. Kury (2007). "Triaenonychidae Sørensen, 1886". In Ricardo Pinto-da-Rocha, Glauco Machado & Gonzalo Giribet. Harvestmen - The Biology of Opiliones. Harvard University Press. pp. 239–246. ISBN 0-674-02343-9. 
  2. ^ Joel Hallan's Biology Catalog: Triaenonychidae