Polychornum centroafricanum, Tang & Zhang & Guo & Luo & Jiang & Pan, 2023
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publication ID |
10.17109/AZH.69.4.365.2023https://zoobank.org/A6EFC42C-14BC-4954-AC63-BD9105005D1F |
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persistent identifier |
https://treatment.plazi.org/id/60548797-FFF9-FFA2-DD2D-585AFC6BF9CD |
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treatment provided by |
Felipe |
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scientific name |
Polychornum centroafricanum |
| status |
sp. nov. |
Polychornum centroafricanum sp. n.
https://zoobank.org/ F04516D9-E884-4E8F-81C4-85D2F415B955 ( Figs 1–19 View Figs 1–5 View Figs 6–10 View Figs 11–19 )
Description – Morphology. Metope narrow, with median carina running from its upper margin throughout postclepeus and with sublateral carinae running from its upper margin, but not reaching metopoclypeal suture ( Figs 4 View Figs 1–5 , 6 View Figs 6–10 ). Median and sublateral carinae not joint. Lateral carinae (margins) of metope smoothly bent to lateral margins of coryphe, in lateral view ( Figs 2 View Figs 1–5 , 7 View Figs 6–10 ). Coryphe slightly narrowing apically, three times as long as wide medially, with deeply angularly concaved posterior margin and keel-shaped lateral margins, anterior margin slightly convex ( Figs 1 View Figs 1–5 , 8 View Figs 6–10 ). Apical part of coryphe slightly turned up in lateral view ( Figs 2 View Figs 1–5 , 7 View Figs 6–10 ). Eyes large, each eye nearly as wide as coryphe. Ocelli present. Pedicel elongately barrel-shaped. Antenna with long flagellum. Pronotum with strongly convex anterior margin and concave posterior margin ( Fig. 1 View Figs 1–5 ). Paradiscal fields of pronotum wide behind eyes. Paranotal lobes of pronotum elongate, with rounded lower margins. Mesonotum three times as long as pronotum medially, with lateral carinae. Fore wings long and narrow, narrowing apically, with narrow, elongately oval basal cell and distinct nodal line ( Fig. 9 View Figs 6–10 ). Forewings protruding far beyond of abdominal apex ( Fig. 3 View Figs 1–5 ). Forewing margin with small setae apically. Radius and median veins running from basal cell by common stem. Forewing vein sequence ( Figs 9, 10 View Figs 6–10 ): R 2–3 (2 – on left and 3 – on right wing), furcating before nodal line; r-m 1; M 4–5 (4 – on right and 5 – on left wing), furcating after nodal line; m-cua 1; CuA 1–2 (1 – on left and 2 – on right wing); CuP 1. Pcu joint A 1 in basal third of wing; clavus long, 4/5 of wing length, reaching abdominal apex, closed (Pcu + A 1 joint CuP before claval apex). Hind wings nearly as long as forewings. Rostrum reaching hind coxae, with 2nd segment twice longer than 3rd one. Apical segment of rostrum cylindrical, not narrowing apically. Hind tibia with a single lateral spine below its middle, and with six apical spines. First metatarsomere long and narrow, three times longer than second one, without spines. Second metatarsomere without spines. Abdominal sternites with deeply angularly concaved hind margins ( Fig. 3 View Figs 1–5 ).
Colouration – General coloration light yellowish green ( Fig. 1–4 View Figs 1–5 ). Coryphe, pro- and mesonotum with wide median red stripe. Each pedicel externally with a round black spot. Forewings with greenish longitudinal veins and red claval margins. Spines of hind tibia with black apices. Claws dark brown.
Male genitalia ( Figs 11–19 View Figs 11–19 ) – Pygofer massive, with large triangular process on its hind margins below anal tube ( Fig. 11 View Figs 11–19 ); its lower margin below styles without processes ( Fig. 12 View Figs 11–19 ). Anal tube twice as long as wide, narrowing apically in lateral view ( Fig. 13 View Figs 11–19 ), al most not narrowed basally, with slightly concave apical margin in dorsal view ( Fig. 14 View Figs 11–19 ). Anal column short. Penis S-shaped, with apex of shaft turned towards its base ( Fig. 17 View Figs 11–19 ); shaft rather wide in ventral and dorsal views, narrowing apically, slightly assymetrical ( Figs 15, 16 View Figs 11–19 ); gonopore subapical (indicated by arrow on Figs 11, 17 View Figs 11–19 ). Style with three long finger-shaped processes – one rounded apically and two narrowed apically ( Figs 18, 19 View Figs 11–19 ).
Total length (from apex of head to apices of forewings): 7.9 mm.
Etymology – Species name is derived from the type locality, Parc national de l’Upemba, which is in the center of Africa.
Type material – Holotype, male, “ Congo belge: P.N.U. / Kaziba (1.140 m.) / 19.II.1948
/ Mis. G. F. de Witte. 1313a”.
Comparison – The new species is closely related to Polychornum tetrainum (Chen et Gong, 2021 (in GONG et al. 2021)) from southern China by the shape and carination of the head as well as by Sshaped penis and hind margins of pygofer with hornshaped processes (see GONG et al. 2021, Figs 1–14 View Figs 1–5 View Figs 6–10 View Figs 11–19 ), however, it differs well by the anal tube not narrowed basally and by the long processes of the style.
view; 18 = style, dorsal view; 19 = style, lateral view. Not to scale
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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