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 angolensis ( Laboissière, 1939 ) comb. nov. Figs 2-9 Exosoma angolensis Laboissière, 1939: 112-113 . Differential diagnosis Oosagitta angolensis comb. nov. has a brown head and pronotum and yellowish elytron, brown legs and underside, while O. geescheae sp. nov. has a brown pattern on yellowish elytron, legs and underside yellowish, O. thomasi sp. nov. is yellowish with brown antennae – except the basal antennal article, O. melanoptica sp. nov. and O. anningae sp. nov. are completely yellowish and O. minuta comb. nov. has a dark brown elytron, legs and underside and is much smaller. Oosagitta angolensis comb. nov. is on average the largest species of the group, and, in the majority of cases, can be easily differentiated from other species by size. Total body length varies between 4.90 and 6.20 mm ( O. geescheae sp. nov. 4.50–4.80 mm , O. anningae sp. nov. 4.25–5.35 mm , O. minuta comb. nov. 3.10–4.20 mm , O. thomasi sp. nov. 4.65–5.50 mm , O. melanoptica sp. nov. 4.15–4.70 mm ). The shape of the median lobe with slender, incised apex, long tectum with very slender tectorial spures allows a clear identification of the males. Type material Holotype ♂ , “Kuvangu mars 1933 / Angola Miss. Sc. Suisse , 1932-33 / Coll. R. I Sc. N. B. / Exosoma angolensis m., V. Laboissière – Det. 1939/ Holotype /AfriGa specimen 753, documented 25.VII.2005 ” ( IRSNB ). ( Fig. 9 ). Type locality ANGOLA : -14.4/16.4. Figs 2-4. Oosagitta angolensis comb. nov. 2 . Habitus, semi-schematic dorsal view, ♀. 3 . Habitus, lateral view, ♀. 4 . Legs: A. Prothoracic leg. B . Mesothoracic leg. C . Metathoracic leg. Scale bars = 1 mm. Other material examined DEMOCRATIC REPUBLIC OF THE CONGO : 2 exx., Kasenga, -10.36/28.63, Feb. 1912 , Dr. Bequaert ( MRAC ); 68 exx., Lulua, Kapanga, -8.35/22.58, Dec. 1931 , G.F. Overlaet ( MRAC ); 6 exx., Lulua, Sandoa, -9.68/22.86, Jan.–Dec. 1931 , G.F. Overlaet ( MRAC ); 5 exx., Lulua, Tshibamba, -8.25/24.37, Dec. 1931 , G.F. Overlaet ( MRAC ); 41 exx., Lulua, Sandoa, Jan.–Dec. 1932 , G.F. Overlaet ( MRAC ); 274 exx., Lulua, Tshibamba, Jan./ Feb. 1932 , G.F. Overlaet ( MRAC ); 1 ex. , Kafakumba, -9.68/23.73, Dec. 1932 , G.F. Overlaet ( MRAC ); 625 exx., Lulua, Kapanga, Sep.–Dec. 1932 , G.F. Overlaet ( MRAC ); 316 exx., Lulua, Kapanga, May–Dec. 1933, G.F. Overlaet ( MRAC ); 11 exx., Mukonkoto, -10.30/23.95, Jan. 1937 ( IRSNB ); 7 exx., Lulua: Kabomba, -6.20/22.37, Nov. 1937 , Vanderstichele ( MRAC ); 1 ex. , Lulua: Kabomba, Dec. 1937 , Garlier ( MRAC ); 1 ex. , Ngowa-Kwango, Dec. 1938 , P. J. Mertens ( IRSNB ); 1 ex. , Maka-Lualaba, 3.13/26.78, Jan. 1939 , H.J. Bredo ( IRSNB ); 2 exx., Musosa, -8.38/29.63, Sep. 1939 , H.J. Bredo ( IRSNB ); 4 exx., Mabwe, r.E. lac Upemba, 585 m , -8.65/26.52, Dec. 1948 , Miss. G.F. de Witte ( IRSNB ); 1 ex. Sankuru, Gandajika, -6.75/23.95, Oct. 1950 , de Francquen ( MRAC ); 1 ex. , Bas-Congo , Kimwanza, -4.427/18.33, May 1956 , Van Eyen ( MRAC ). Figs 5-7. Oosagitta angolensis comb. nov. 5 . Basal four antennomeres of 2 ♂♂ and 2 ♀♀. 6 . Spermathecae of 3 ♀♀. 7 . Median lobe: A . Dorsal. B . Detail: apex of endophallus. C . Lateral. Scale bars = 1 mm. Fig. 8. Distribution of O. angolensis comb. nov. , O. melanopicta sp. nov. and O. thomasi sp. nov. Fig. 9. Holotype of Oosagitta angolensis comb. nov. A . Overview with labels. B . Close-up of specimen. KENYA : 1 ex. , Voi, 2000 ft , -3.39/38.56, Nov. 1948 , J.G. Williams ( BMNH ). NAMIBIA : 1 ex. , Bushmanland: Klein Dobe, -19.42/20.35, Feb. 1992 , Namibia Expedition ZMB, M. Uhlig ( MNHU ). UGANDA : 15 exx., District Masindi , Budono Forest n. Sonso, 1.75/31.58, Jul. 1995 , Th. Wagner ( ZFMK ). ZAMBIA : 16 exx., Kabwé, -9.12/30.67, Feb. 1944 , H.J. Bredo ( IRSNB ), 6 exx., Mweru-Wantipa, -8.75/29.50, Mar. 1944 , H.J. Bredo ( IRSNB ); 4 exx., 29 km NW Chipata, Kamanga, 825 m , -13.50/30.48, Mar. 1993 , M. Uhlig ( MNHU ). Redescription MEASUREMENTS. n = 30, total length 4.90–6.20 mm (mean 5.54 mm ; Fig. 2 ); maximum height in lateral view 1.75–2.35 mm (mean 2.00 mm); ( Fig. 3 ). HEAD. Brown. Maximum width of eye to minimum distance between eyes 0.57–0.77 (mean 0.67). Length of second to third antennomere 0.46–0.75 (mean 0.58), length third to fourth antennomere 0.59–0.81 (mean 0.69; Fig. 5 ). Antennae brown. Mean antennal length to total body length ratio 0.82. THORAX. Brown as head. Pronotum brown with delicate punctation on the flat disc. Pronotal width 1.60–2.00 mm (mean 1.85 mm ), length of pronotum 1.00– 1.30 mm (mean 1.17 mm ), pronotal width to length 1.43–1.67 (mean 1.59). Elytron yellow to yellowish-brown with irregular, coarse punctation. Elytral length 3.70–4.75 mm (mean 4.28 mm ), maximum width of both elytra combined 2.80–3.70 mm (mean 3.31 mm ), ratio of maximum width of elytra combined to length of elytron 0.71–0.87 (mean 0.77). Scutellum brown, delicate punctation like pronotum. Underside and legs entirely brown. Length of basimetatarsus to length of metatibia 0.27–0.31 (mean 0.30). ABDOMEN. Brown. MALE GENITALIA. Median lobe slightly waisted in dorsal view ( Fig. 7A ), conical and incised at apex. Tectum is conical with a very elongated, slender apical part that is bent ventrally at the apex. It has long, slender tectorial spures at each side ( Fig. 7A, C ). Endophallus brush emerges from broad, arrow-like structure ( Fig. 7B ). Orifice of median lobe is ovoid with a rather deep incision ( Fig. 7A ). Distribution Widely distributed in Central, East and Southern Africa, from the Congo Basin towards Kenya in the northeast and to Zambia and northern Namibia in the South ( Fig. 8 ).