Oosagitta minuta Kortenhaus & Wagner 2013, comb. nov.
Creators: name: Kortenhaus, Sabine
name: Wagner, Thomas
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Oosagitta
Oosagitta minuta

description: 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.
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).
description: Published as part of Kortenhaus, Sabine & Wagner, Thomas, 2013, Oosagitta gen. nov. from tropical Africa, with revision of two species and description of four new species (Coleoptera: Chrysomelidae, Galerucinae), pp. 1-24 in European Journal of Taxonomy 58 on pages 10-13, DOI: 10.5852/ejt.2013.58, http://zenodo.org/record/3824909