Belongs within: Phlaeothripidae.
The Urothripini are a distinctive group of often wingless thrips found in leaf litter, probably feeding on fungal hyphae. They are characterised by their particularly long anal tubes bearing long terminal setae. The species Habrothips curiosus and Octurothrips pulcher have two-segmented mid- and hind-tarsi and well-developed compound eyes with more than thirty facets, but in all other genera the tarsi are one-segmented and the eyes are simplified with fifteen or fewer facets (Mound 1972).
Characters (from Mound & Marullo 1996): Tergite IX more than 2.0 times as long as tergite VIII medially; anal tube often longer than head, with long terminal setae; hind coxae more widely separated than mid coxae; usually apterous, and with antennal segments III to V closely joined.
<==Urothripini [Urothripinae]MM96 |--Amphibolothrips Buffa 1909M72 | |--*A. grassii Buffa 1909M72 | |--A. knechteli [=Bebelothrips knechteli]M72 | `--A. marginatus [=Bebelothrips marginatus, Trachythrips marginatus]M72 |--Bebelothrips Buffa 1909M72 | |--*B. latus Buffa 1909M72 | `--B. flavicinctusM72 |--Conocephalothrips Bianchi 1946M72 | `--*C. tricolor Bianchi 1946M72 |--Octurothrips Priesner 1931M72 | `--*O. pulcher Priesner 1931M72 |--Urothrips Bagnall 1909M72 | |--*U. paradoxus Bagnall 1909M72 | |--U. bagnalliM72 | `--U. minorM72 |--Bradythrips Hood & Williams in Hood 1925MM96 | `--*B. hesperus Hood & Williams in Hood 1925MM96 |--Baenothrips Crawford 1948MM96 (see below for synonymy) | |--*B. guatemalensis Crawford 1948MM96 | |--B. asper (Bournier 1963) [=*Transithrips asper]M72 | |--B. caenosus (Stannard 1952) [=Amphibolothrips (*Verrucothrips) caenosa]M72 | |--B. chiliensis Stannard 1970MM96 | |--B. erythrinus (Pelikan 1964) [=Stephanothrips erythrinus]MM96 | |--B. indicus (Ananthakrishnan 1966) [=*Bournieria indica]M72 | |--B. minutus (Ananthakrishnan 1964) [=*Ramachandraiella minuta]M72 | |--B. moundi (Stannard 1970) [=Transithrips moundi]M72 | `--B. murphyiM72 |--Stephanothrips Trybom 1912MM96 | |--*S. buffai Trybom 1912 [incl. S. graminis]M72 | |--S. barretti Mound 1972M72 | |--S. bradleyi Hood 1927MM96 | |--S. carolina Hood 1938MM96 | |--S. corticinus Watts 1935MM96 | |--S. ferrari Mound 1972M72 | |--S. fusiantennatus Watts 1935MM96 | |--S. occidentalis Hood & Williams 1925MM96 | |--S. uvaroviM72 | `--S. whitcombi Watson 1942MM96 |--Trachythrips Hood 1930MM96 | |--*T. watsoni Hood 1929M72 | |--T. albipes Hood 1933MM96 | |--T. astutusM72 | |--T. brevisM72 | |--T. brevitubus Stannard 1957MM96 | |--T. deleoni Hood 1933MM96 | |--T. epimeralis Hood 1941MM96 | |--T. frontalis Hood 1933MM96 | |--T. gracilisM72 | |--T. seminole Hood 1939MM96 | |--T. watsoniM72 | `--T. wirshinghi Medina Gaud 1961MM96 |--Biconothrips Stannard 1970M72 | `--*B. reedi Stannard 1970M72 |--Habrothrips Ananthakrishnan 1967M72 | `--*H. curiosus Ananthakrishnan 1967M72 |--Coxothrips Bournier 1963M72 | `--*C. reticulatus Bournier 1963M72 |--Ananthakrishnaniella Stannard 1970M72 | `--*A. tarai Stannard 1970M72 |--Leichhardtithrips Tree & Mound 2013TM13 | `--*L. evanidus Tree & Mound 2013TM13 `--Adurothrips atopusTM13
Baenothrips Crawford 1948MM96 [incl. Bournieria Ananthakrishnan 1966M72, Ramachandraiella Ananthakrishnan 1964M72, Transithrips Bournier 1963M72, Verrucothrips Stannard 1952M72]
*Type species of generic name indicated
References
[M72] Mound, L. A. 1972. Species complexes and the generic classification of leaf-litter thrips of the tribe Urothripini (Phlaeothripidae). Australian Journal of Zoology 20: 83–103.
[MM96] Mound, L. A., & R. Marullo. 1996. The thrips of Central and South America: an introduction (Insecta: Thysanoptera). Memoirs on Entomology, International 6: 1–487.
[TM13] Tree, D. J., & L. A. Mound. 2013. Leichhardt’s vanishing thrips: a remarkable new genus and species of Insecta, Thysanoptera, Phlaeothripinae. Memoirs of the Queensland Museum—Nature 58: 375–379.