Caddoidea are mostly found in temperate zones of both hemispheres; however, they are known from the
Palearctic only from
Japan, and from
Baltic amber (about 40 million years old). One species known from Japan is also found in
North America, where several more species are found. Other species occur in Southern
South America,
Venezuela,
New Zealand and
Australia. Neopilionidae show a
Gondwanan distribution, with species found in South America,
South Africa and Australia. Sclerosomatidae are divided into several subfamilies, with Gagrellinae found in the
Indo-Malayan and neotropical region, Gyinae at high elevations in the
Caucasus,
Alps and
Nepal, Leiobuninae in the holarctic region down to
Costa Rica, and Sclerosomatinae only in the Palearctic. In the Phalangiidae, the Phalangiinae are most diverse in the Mediterranean, with several endemic genera in nearby coastal Africa. Although there are several Phalangiinae in the Nearctic, they are all introduced. Opilioninae are mostly palearctic, with a few species found in
Southeast Asia. Oligolophinae are holarctic, with most species found in Europe. Platybuninae are also found from Europe to the Caucasus, with one find from
Sumatra. ==Relationships==