Common name

Kuwaniids

Field characters

Body elongate; cyst stage without legs, occurring in cracks on trunk or under bark; often brightly colored; adult females produce a white waxy ovisac that covers the body; males and females of some species appear on the bark in the fall.

Validation characters

Most species with clubbed setae at distal end of tibia; tarsus curved; most species with more than 1 campaniform sensilla on second antennal segment; basal segment of antenna largest; 4 to 8 pairs of abdominal spiracles; abdominal spiracles with pores in atrium; tarsus 1-segmented; 1 or more denticles on claw.

Notes

Taxa in this family are relatively uniform in morphology, except for the African species K. oligostigma DeLotto. It lacks abdominal spiracles and the clubbed setae at the distal end of the tibia, but it has other characteristics of the family. Kuwaniidae MacGillvray was first used as a family by Koteja (1974).

Distribution

Kuwaniids occur in 4 zoogeographical regions. The Afrotropical region, Palaearctic region, Oriental region, and Nearctic region. They are most speciose in the Palaearctic region.

Hosts

Kuwaniids occur on trees and are most common on oaks (Quercus Fagaceae). There also are single species on Pasania (Fagaceae), Commiphora (Burseraceae), Antidesma (Euphorbiaceae), and Zizyphus (Rhamnaceae). Neosteingelia is found on forest trees such as pecans and hickories.

Life history

Little is known about the life history of kuwaniids. We suspect that there are 4 instars in the female including the crawler, 2 cyst stages, and the adult. Males are unknown. Goux 1938c suggested that there was a single generation each year in Kuwania rubra Goux. Neosteingelia probably has 3 instars in the female and 5 in the male. Crawlers settle in cracks or under the bark; second-instar cysts develop under the bark; and adult males and females wander on the trunks of the host seeking mates in the fall of the year; adult females produce a filamentous ovisac in cracks of the bark. A generation may require more than 1 year for completion.

Important references

Borchsenius 1960e; DeLotto 1959a; Gill 1993; Goux 1938c; Hao, Wu, Jia, and Tang 1995; Hodgson and Foldi 2006; Kosztarab and Watson 1994;Koteja 1974;Miller 1985b; Morrison 1928; Wu, Nan, Gullan and Deng 2013.

Diversity

Click here for a check list of all kuwaniid genera and species.