Olios

Classification

Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Sparassidae
Genus: Olios

Pronunciation

How to pronounce Olios: /ˈoʊ.li.oʊs/

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Summary

Olios is the largest genus of huntsman spiders, containing 166 species distributed globally, primarily in warmer regions. They exhibit diverse physical characteristics and occupy a wide range of habitats, primarily as nocturnal hunters in vegetative areas.

Physical Characteristics

Small to large Sparassidae with eight eyes in two partially straight rows. Smaller species are usually light brown to brown with darker areas; larger species tend to be darker, and some may appear green.

Identification Tips

Look for eight eyes arranged in two rows; coloration varies between species, with some showing distinct patterns.

Habitat

Found in a variety of habitats including savannahs and rainforests, primarily in vegetation; rarely found in human dwellings.

Distribution

Worldwide, with a significant presence in hot countries. One species, Olios giganteus, is located in parts of North America (CA, AZ, NM, TX, UT, NV).

Diet

Nocturnal hunters, preying on insects and other small arthropods.

Ecosystem Role

As predatory spiders, they play a role in controlling insect populations within their ecosystems.

Evolution

First described by Charles Athanase Walckenaer in 1837. The genus is the largest among huntsman spiders, containing 166 species as of November 2022, though prior classifications have changed with some species moved to the new genus Curicaberis.

Similar Taxa

Curicaberis

Misconceptions

The name Olios fasciculatus was based on mislabeled specimens from Africa, indicating potential taxonomical errors in historical classifications.