author(s)
Wenceslas Yana, Yves Patrick Mveyo Ndankeu, Victor Joly Dzokou and Joseph Lebel Tamesse

abstract
Trioza kala sp. nov. is described and illustrated from Cameroon. Trioza kala develops on Beilschmiedia obscura (Lauraceae), a valuable timber tree on which it causes serious damage by inducing leaf galls and necrosis. The main objective of this work is to describe and identify a new species of Trioza genus in Cameroonian fauna. The study was conducted in the Centre Region of Cameroon on Mount Kala from January 2006 to December 2007. Trioza kala is characterized by: the fifth instar larva abdomen composed of a submargin which bears truncate tubular sectasetae and distal margin without setae; in the adult, the first flagellomere is wide and elongated, bears a large number of rhinaria, the flagellomeres 3, 4, and 6 bear a single subapical rhinarium while the one on flagellomere 5 is medial; flagellomeres 2 and 7 bear two subapical rhinaria; veins of the forewings lack setae; hindwing has 3 setae before the costal break, 5 plus 2 setae and humalus after the costal break; internal margin of paramere is more incurved; distal portion of aedeagus presents a sinusoidal form. The new species is closely related to Trioza hargreavesi an Ugandian species described previously. The host plant and nymphs of T. hargreavesi were unknown. The differences between T. kala with other species were discussed in this study.