Oosagitta melanopicta, Kortenhaus & Wagner, 2013
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publication ID |
https://doi.org/ 10.5852/ejt.2013.58 |
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publication LSID |
lsid:zoobank.org:pub:F3F3995B-7009-467F-99C1-43ED56039BFA |
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DOI |
https://doi.org/10.5281/zenodo.3843805 |
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persistent identifier |
https://treatment.plazi.org/id/4E493FBA-DE58-4EE4-9DE4-79D63C0FD211 |
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taxon LSID |
lsid:zoobank.org:act:4E493FBA-DE58-4EE4-9DE4-79D63C0FD211 |
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treatment provided by |
Carolina |
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scientific name |
Oosagitta melanopicta |
| status |
sp. nov. |
Oosagitta melanopicta sp. nov.
urn:lsid:zoobank.org:act:4E493FBA-DE58-4EE4-9DE4-79D63C0FD211
Figs 8 View Fig , 27-30 View Figs 27-29 View Fig
Differential diagnosis
Oosagitta melanoptica sp. nov. has a peculiar character in the significant black patch behind the eye. Further differentiation is possible by the characteristic broad shape of the median lobe.
Etymology
Named after the significant dark brown postocular patch.
Type material
Holotype
♂, “Coll. Mus. Congo, Stanleyville: Yangambi, km 7, 29.V.1956, R. Damoiseau, C.00.53/ Récolté sur Canvalaria curiformis/AfriGa specimen ID 1900, 15.III.2013 ” ( MRAC).
Paratypes
DEMOCRATIC REPUBLIC OF THE CONGO: 1 ♂, 2 ♀♀, same data as holotype; 1 ♂, Mayidi, -5.19/15.15, 1942, P. Van Eyen ( MRAC).
Type locality
DEMOCRATIC REPUBLIC OF THE CONGO: Stanleyville [Kisangani], Yangambi, 0.81/24.43.
Description
MEASUREMENTS. n = 5, total length 4.20–4.70 mm (mean 4.42 mm; Fig. 27 View Figs 27-29 ); maximum height in lateral view 1.80–2.20 mm (mean 1.95 mm).
HEAD. Yellowish, dark brown postocular patch, labrum brown. Maximum width of eye to minimum distance between eyes 0.63–0.75 (mean 0.71). Length of second to third antennomere 0.58–0.67 (mean 0.61), length third to fourth antennomere 0.63–0.77 (mean 0.70; Fig. 28 View Figs 27-29 ). Antennae yellowish. Antennal length to total body length 0.87–0.98 (mean 0.91).
THORAX. Yellowish. Pronotum yellowish nearly without punctation. Pronotal width 1.50–1.75 mm (mean 1.61 mm), length of pronotum 0.85–1.00 mm (mean 0.92 mm), pronotal width to length 1.65–1.94 (mean 1.76). The elytron is yellowish and has delicate brown margins and an irregular coarse punctation. Elytral length 3.05–3.75 mm (mean 3.35 mm), maximum width of both elytra combined 2.60–3.15 mm (mean 2.94 mm), ratio of maximum width of elytra combined to length of elytron 0.81–0.97 (mean 0.88). Metathorax more yellow than pro- and mesothorax and abdomen. Legs paler yellowish. Length of basimetatarsus to length of metatibia 0.29–0.33 (mean 0.31).
MALE GENITALIA. The symmetric conical aedeagus slightly curved ventrally, median lobe tapers to a short point ( Fig. 29A, B View Figs 27-29 ). Tectum with very broad base, which narrows to a ventrally bent, flattened structure. Very long, slender and strongly curved tectorial spures intersect themselves nearly at the apex. Apically these structures are curved dorsally ( Fig. 29A, B View Figs 27-29 ). Endophallus brush is emerging from the arrow-like endophallus ( Fig. 29A View Figs 27-29 ). Orifice of median lobe ovoid with a rather great incision ( Fig. 29A View Figs 27-29 ).
Distribution
Only known from two sites along the Congo River ( Fig. 8 View Fig ).
Identification key
1. Elytra dark brown, total body length <4.20 mm, tectum shorter than median lobe with hooked tectorial spurs ( Fig. 12A, C View Figs 10-12 ); Uganda, SE Congo and northern states of South Africa ( Fig. 13 View Fig ) ....... .............................................................................. Oosagitta minuta ( Laboissière, 1937) comb. nov.
– Elytra mainly yellowish, total body length> 4.20 mm ..................................................................... 2
2. Elytron yellowish with a light brown base and apex ( Fig. 19 View Figs 19-21 ), median lobe with tectum narrows to a rectangular, spatulate structure ( Fig. 21A View Figs 19-21 ); Cameroon, Congo Basin towards western Uganda ( Fig. 13 View Fig ) ................................................................................................. Oosagitta geescheae sp. nov.
– Elytron unicolor pale yellowish to yellowish-brown......................................................................... 3
3. Pronotum and head dark brown, contrasting to the yellowish to yellowish-brown elytra, median lobe with incised apex, ventrally bent, elongated, slender tectum ( Fig. 7A View Figs 5-7 ); widely distributed in central, east and southern Africa ( Fig. 8 View Fig )..................... Oosagitta angolensis ( Laboissière, 1939) comb. nov.
– Head, pronotum and elytra unicolorous yellowish ............................................................................ 4
4. Scapus yellowish, antennomere 2–11 brown, median lobe broad, tectum very broad at base stringly narrowed in the apical half ( Fig. 25A, B View Figs 23-25 ); known from Nigeria, Congo Basin and Burundi ( Fig. 8 View Fig ) ................................................................................................................. Oosagitta thomasi sp. nov.
– Antennae yellowish throughout......................................................................................................... 5
5. Head yellow with significant postocular dark brown to black spot, ventral part of median lobe about the same length as tectum and tectorial spures ( Fig. 29 View Figs 27-29 ); only knowm from to sites along the Congo River ( Fig. 8 View Fig ) .................................................................................... Oosagitta melanopicta sp. nov.
– Head yellow throughout, ventral part of median lobe much shorter than the tectm and the apically crossed tectorial spures ( Fig. 17 View Figs 15-17 ); restricted to western Africa from the Ivory Coast to Togo ( Fig. 13 View Fig ) .................................................................................................. Oosagitta anningae sp. nov.
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