Revision of the Orbamia Herbulot, 1966 group of genera with description of two new genera, ten new species, and two new subspecies (Lepidoptera, Geometridae, Ennominae, Cassymini) Author Tujuba, Tesfu Fekensa Ethiopian Biodiversity Institute, Comoros street, Addis Ababa, Ethiopia & Department of Agriculture, Environment and Food Sciences, University of Molise, Via Francesco De Sanctis Campobasso, Italy Author Hausmann, Axel SNSB-Zoologische Staatssammlung Muenchen, Muenchhausenstr, 21, Munich, Germany https://orcid.org/0000-0002-0358-9928 hausmann.a@snsb.de Author Sciarretta, Andrea Department of Agriculture, Environment and Food Sciences, University of Molise, Via Francesco De Sanctis Campobasso, Italy https://orcid.org/0000-0002-9443-4816 text ZooKeys 2020 929 53 77 http://dx.doi.org/10.3897/zookeys.929.50391 journal article http://dx.doi.org/10.3897/zookeys.929.50391 1313-2970-929-53 D5E1D8E57DF3440893ED94CDE2C59FEA 6785C7A545C65EEF922F6A1FEF48EC3D Orbamia clarissima Hausmann & Tujuba sp. nov. Figures 5 , 23 , 41 , 59 , 76 Examined material. Holotype : ♀, Kibwezi, B.E.A. [Kenya], 12 March 1917 (W. Feather), coll. ZSM (ZSM G 13618). Paratypes : 1♂, Kibwezi, B.E.A. [Kenya], April 1922 (W. Feather); 1♂, Kenya, Mutha, 5.IV.69, Watulege; 1♀, Kenya, Musthomo, 13.III.69, Watulege (ZSM G 13617); 1♂, Somalia m., Caonole Fluss , 21.1.1988, leg. Dr. Politzar (all ZSM). ZSM G 13647/♂. Etymology. The name refers to the very pale ground colour (Lat. clarissimus, -a, -um = palest, clearest). Differential features (COI sequences, photographs of adults and their genitalia see https://dx.doi.org/10.5883/DS-ORBAMIA): Adult: Forewing length: 7.5-11 mm, one of the smallest Orbamia species. Upperside of wings: Ground colour whitish with slight grey brown suffusion. Underside: Ground colour white with slight orange tinge, mainly towards termen between veins, apical spots on all wings conspicuous, sharp. Male genitalia: Uncus long, digitiform, stout, valva straight, dorsal process with small spinule at tip, cornutus very short (1.0 mm) and tiny. Female genitalia: Apophyses stout, apophyses anteriores comparatively long (2/3 length of apophyses posteriores), lamella ante-vaginalis heart-shaped (length and width 0.45 mm), signum small, sclerotised, transverse ridge straight (0.15 mm).