Oosagitta anningae, Kortenhaus & Wagner, 2013

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), European Journal of Taxonomy 58, pp. 1-24 : 13-15

Oosagitta anningae sp. nov.

urn:lsid:zoobank.org:act:76E6057D-8AB6-4DA8-BE69-CC7BF76F68BC

Figs 13 , 15-18

Differential diagnosis

Oosagitta anningae sp. nov. is completely yellowish, while O. angolensis comb. nov. has a brown head and pronotum and yellowish elytron, O. geescheae sp. nov. has a brown pattern on yellowish elytron, O. thomasi sp. nov. has brown antennomeres, O. melanoptica sp. nov has a dark brown postocular patch and O. minuta comb. nov. has dark brown elytron. It is the only species from tropical western Africa and occurs allopatrically with all other species. A definitive identification is possible by examination of the shape of male genitalia ( Fig. 17 ).

Etymology

Named after Sabine Kortenhaus’ daughter Anning.

Type material

Holotype

♂, “Coll. Mus. Tervuren Côte d’Ivoire: Bingerville, Sep. 1963, J. Decelle /AfriGa specimen ID 1898, 26.XI. 2012” ( MRAC) ( Fig. 18 ).

Paratypes

GHANA: 3 exx., Takoradi, 4.88/-1.75, Besnard ( MRAC).

IVORY COAST: 2 exx., Adiopodoumé, 5.34/-4.13, Aug. 1952 ( MNHN); 1 ex., Adiopodoumé, Feb. 1957, P. Dessart ( MRAC); 1 ex., Zepreghe-Koffikro (Daloa), 6.91/-6.37, Jul. 1961, J. Decelle ( MRAC); 2 exx., Bingerville, 5.36/-3.89, Feb. 1963, J. Decelle ( MRAC).

TOGO: 1 ex., Misahöhe, 6.95/0.58, May 1894, E. Baumann ( MNHU).

Type locality

IVORY COAST: Bingerville, 5.36/-3.89.

Description

MEASUREMENTS. n = 11, total length 4.25–5.35 mm (mean 4.85 mm; Fig. 15 ); maximum height in lateral view 1.60–2.05 mm (mean 1.80 mm).

HEAD. Yellowish, mandibles darker brown. Maximum width of eye to minimum distance between eyes 0.73–0.83 (mean 0.79). Length of second to third antennomere 0.36–0.50 (mean 0.43), length third to fourth antennomere 0.69–0.83 (mean 0.75; Fig. 16 ). Antennae yellowish. Mean antennal length to total body length ratio 0.91.

THORAX. Pronotum yellowish with very delicate punctation. Pronotal width 1.50–1.90 mm (mean 1.71 mm), length of pronotum 0.90–1.20 mm (mean 1.05 mm), pronotal width to length 1.50–1.73 (mean 1.62). Elytron is yellowish and has irregular punctation, only a bit coarser than pronotum. Elytral length 3.35–4.25 mm (mean 3.91 mm), maximum width of both elytra combined 2.50–3.45 mm (mean 3.04 mm), ratio of maximum width of elytra combined to length of elytron 0.73–0.83 (mean 0.78). Pro-, meso- and metathorax, abdomen and legs are yellowish. Tibia is gently curved. Length of basimetatarsus to length of metatibia 0.24–0.32 (mean 0.29).

MALE GENITALIA. Aedeagus very broad, rather erect, only the outermost apex of median lobe and tectum curved ventrally ( Fig. 17C ). The slightly waisted, broad tectum covers basal two thirds of very long, slightly bent and apically crossed tectorial spures that are much longer than the ventral part of the median lobe ( Fig. 17A ). Endophallus long, with slender base, two short “arrow-hooks” and very slender and long apical part that is emerging out of the median lobe ( Fig. 17A, B ). Orifice of median lobe ovoid with a rather deep incision ( Fig. 17A ).

Distribution

Western Africa from Ivory Coast towards Togo ( Fig. 13 ).

Figures

Fig. 13. Distribution of O. minuta comb. nov., O. anningae sp. nov. and O. geescheae sp. nov.

Figs 15-17. O. anningae sp. nov. 15. Habitus, semi-schematic dorsal view. 16. Basal four antennomeres of 2 ♂♂ and 2 ♀♀. 17. Median lobe. A. Dorsal. B. Detail: apex of endophallus. C. Lateral. Scale bars: 1 mm.

Fig. 18. Holotype of O. anningae sp. nov. A. Overview with labels. B. Close-up of specimen.