Oosagitta gen. nov. from tropical Africa, with revision of two species and description of four new species (Coleoptera: Chrysomelidae, Galerucinae) Author Kortenhaus, Sabine 95CDF19F-25D1-4ED7-839A-0513BACD765A Institut für Integrierte Naturwissenschaft - Biologie, Universität Koblenz-Landau, Universitätsstrasse 1, D- 56070 Koblenz, Germany Email: thwagner @ uni-koblenz. de (corresponding author) & urn: lsid: zoobank. org: author: 95 CDF 19 F- 25 D 1 - 4 ED 7 - 839 A- 0513 BACD 765 A Author Wagner, Thomas 6AF65C9C-246B-41CA-B326-2D93C427CCD1 Institut für Integrierte Naturwissenschaft - Biologie, Universität Koblenz-Landau, Universitätsstrasse 1, D- 56070 Koblenz, Germany Email: thwagner @ uni-koblenz. de (corresponding author) & urn: lsid: zoobank. org: author: 6 AF 65 C 9 C- 246 B- 41 CA-B 326 - 2 D 93 C 427 CCD 1 text European Journal of Taxonomy 2013 2013-10-11 58 1 24 journal article 22242 10.5852/ejt.2013.58 aa9c7881-e897-4e4b-b67b-2b4f4ee348c9 2118-9773 3824909 F3F3995B-7009-467F-99C1-43ED56039BFA Oosagitta minuta (Laboissière. 1937) comb. nov. Figs 10-14 Ergana minuta Laboissière, 1937: 151-152 . Differential diagnosis Oosagitta minuta comb. nov. is the smallest species of the genus with a total body length between 3.10 and 4.20 mm . There is no other specimen of the other five species of such small size known. Antennae of O. minuta comb. nov. are shorter than those of the other described species: mean antennal length to total body length is 0.56–0.65 (other species 0.75–1.00). Also the coloration differs strongly from the other species, since O. minuta comb. nov. has dark brown elytron, while all other species show yellowish to yellowish-brown elytron throughout or yellow with brownish base and apex ( O. geescheae sp. nov. ). Type material Lectotype ♂ , “ Uganda , Busso Busoga , May 1909 , Dr. E. Bayon /Mus. Civ. Genova/Type male/Ergana minuta, m, V. Laboissière m. V. Laboissière – Det./AfriGa specimen ID 885, 17.IV.2004 ” ( MCGD ). A lectotype is herein designated to fix the name on a single specimen. ( Fig. 14 ). Paralectotype 1 ♂ , same data as lectotype , additionally “Le Moult vend. via Reinbek, Eing. Nr. 1, 1957” ( ZMUH ). Type locality UGANDA : Bussoga, -0.23/30.11. Figs 10-12. Oosagitta minuta comb. nov. 10 . Habitus, semi-schematic dorsal view. 11 . Basal four antennomeres of 2 ♂♂ and 2 ♀♀. 12 . Median lobe: A . Dorsal. B . Detail: apex of endophallus. C . Lateral. Scale bars = 1 mm. Fig. 13. Distribution of O. minuta comb. nov. , O. anningae sp. nov. and O. geescheae sp. nov. Fig. 14. Lectotype of Oosagitta minuta comb. nov. A . Overview with labels. B . Close-up of specimen. Other material examined DEMOCRATIC REPUBLIC OF THE CONGO : 2 exx., Parc Nat. de la Upemba, affl. Lusinga ( 1585 m ), 0.733/28.62, Dec. 1947 , Miss. G.F. de Witte ( IRSNB ); 5 exx., Parc Nat. de la Upemba, Lusinga ( 1760 m ), 0.167/26.30, Dec. 1947 , Miss. G.F. de Witte ( IRSNB ); 2 exx., Parc Nat. de la Upemba, Mabwe (r. E. lac Upemba), 585 m , -8.65/26.52, Dec. 1948 , Miss. G.F. de Witte ( MRAC ). SOUTH AFRICA : 1 ex. , Natal, Malvern, C.I.E. Coll. No. 15946, G.E. Bryant det.: Ergana proteus ( BMNH ); 1 ex. , Südafrika: Transvaal, lekgalameetse Nat. Res., -24.08/30.25, Dec. 1995 , F. Koch ( MNHU ). Redescription MEASUREMENTS. n = 12, total length 3.10–4.20 mm (mean 3.75 mm ; Fig. 10 ), maximum height in lateral view 1.30–1.50 mm (mean 1.40 mm ). HEAD. Yellowish to brown, mandibles dark brown. Maximum width of eye to minimum distance between eyes 0.55–0.78 (mean 0.68). Length of second to third antennomere 0.5–0.75 (mean 0.64), length third to fourth antennomere 0.67–0.89 (mean 0.78; Fig. 11 ). Basal antennomeres yellowish, antennae becoming darker towards the apex. Mean antennal length to total body length ratio 0.60. THORAX. Pronotum yellowish with very delicate punctation. Pronotal width 1.00– 1.50 mm (mean 1.28 mm ), length of pronotum 0.65–0.95 mm (mean 0.81 mm ), pronotal width to length 1.41–1.77 (mean 1.57). Elytron dark brown, irregular punctation, coarser than pronotum. Elytral length 2.35– 3.25 mm (mean 2.82 mm ), maximum width of both elytra combined 1.80–2.60 mm (mean 2.23 mm ), ratio of maximum width of elytra combined to length of elytron 0.73–0.88 (mean 0.79). Pro-, meso- and metathorax, abdomen and legs dark brown, coxae and distal/proximal parts of tarsomeres yellowish or light brown. Tibia has all around setae and is gently curved. Length of basimetatarsus to length of metatibia 0.25–0.35 (mean 0.30). MALE GENITALIA. The symmetric median lobe tapers and is down-curved in lateral view. The tectum is shorter than median lobe and nearly triangular ( Fig. 12A ). Tectorial spures are very slender, the basal two thirds covered by the tectum, the apices very fine and dorsally hooked ( Fig. 12A, C ). Endophallus with broad base fine “arrow-hooks” ( Fig. 12A, B ). Basal orifice of median lobe ovoid with an incision ( Fig. 12A ). Distribution Known from southern Uganda , southeastern Congo and from the northern states of South Africa ( Fig. 13 ).