Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region Author Huber, John T. Author Read, Jennifer D. Author Triapitsyn, Serguei V. 0000-0002-5086-7847 serguei.triapitsyn@ucr.edu text Zootaxa 2021 2021-09-13 5036 1 1 166 http://dx.doi.org/10.11646/zootaxa.5036.1.1 journal article 10.11646/zootaxa.5036.1.1 1175-5326 5502952 9047AF72-0A9C-4636-B3A9-1018DA9F686A GONATOCERUS Nees, 1834 ( Figs 150–156 ) Gonatocerus Nees, 1834: 192 . Type species: Gonatocerus longicornis Nees, 1834 , by monotypy. Diagnosis . Gonatocerus is distinguished from other members of Gonatocerini by the following combination: vertex with 2 setae between lateral ocelli ( Fig. 150 ); pronotum divided medially by longitudinal suture and the lobes abutting medially except sometimes slightly separated dorsally ( Fig. 153 ); fore wing relatively narrow, with apex evenly rounded, and with microtrichia usually as dense behind venation as beyond venation ( Fig. 152 ); stigmal vein with apex usually slightly oblique ( Fig. 152 ); dorsellum diamond-shaped ( Fig. 153 ); propodeum with faint, converging sublateral lines, or lines absent; pronotal spiracle about same size as propodeal spiracle ( Fig. 154 ); ovipositor not produced anteriorly under mesosoma ( Figs 155, 156 ). Discussion . Gonatocerus belongs to the Gonatocerus group of genera, treated formally as Gonatocerini by Huber (2015). In the Afrotropical region this group also includes Cosmocomopsis , Heptagonatocerus , Lymaenon , Octomicromeris , Tanyxiphium and Zeyanus . Gonatocerus is not as easy to characterize as the other genera in the group. Useful features that help distinguish Gonatocerus species are: female antenna with fu 2 and fu 3 slightly the longest funicle segments and apex of fu 2 oblique. The dorsellum margin may be lighter in colour than the central area of the dorsellum. Afrotropical hosts . Unknown. Important reference . Huber (2015).