Ctonoxylon camerunum Hagedorn, 1910

Jordal, Bjarte H., 2024, An integrated taxonomic revision of Ctonoxylon (Coleoptera, Curculionidae, Scolytinae) reveals new Malagasy species originating from multiple recent colonisations of the island, ZooKeys 1203, pp. 95-130 : 95-130

Ctonoxylon camerunum Hagedorn

Figs 39 , 42 , 45

Ctonoxylon camerunum Hagedorn, 1910: 4.

Ctonoxylon fuscum Hagedorn, 1910: 5. Synonym by Eggers 1920.

Ctonoxylon conradti Schedl, 1939: 171 , syn. nov.

Type material.

Holotype: Kamerun [ ZMHB] . Holotype C. conradti , female: [ Tanzania] Insel Ukerewi [ NHMW] .

Diagnosis.

Length 3.4–3.8 mm. 2.0–2.1 × as long as broad; colour brown. Upper and lower eye parts separated by 1.5 × the width of upper part; pronotal eye scraper acutely pointed; a sharp carina running from scraper to procoxa, without associated groove or propleural pit; scutellar shield at level with elytra; striae weakly impressed; interstrial setae sort, bristle-like, dense, confused with similar type of ground vestiture; elytral apex slightly emarginated; elytral suture buckled on disk; resting position of mesotibiae marked on metaventrite.

Distribution.

Liberia (new country record), Ivory Coast, Nigeria, Cameroon, Equatorial Guinea, Gabon, Democratic Republic of the Congo, Angola, Tanzania.

New records.

Liberia, Suakoko [6.98, - 9.54], 28.1– 5.5. 1952, light trap, Blickenstaff leg (47); Cape Mount [6.72, - 11.34], 1940, M. Mann (1) [ USNM] ; Nigeria, Ife , W. State [7.48, 4.48], 25. 03. 1969, J. T. Medler [1, USNM] ; Cameroon, Yangamo, 100 km NE Bertoua [GIS: 5.00, 14.025], 25. 03. 1984, Kunze & Nagel, leg. [ ZFMK] ; 10 km S of Tongo [4.91, 10.77], 02. 03. 1972, black light, J. A. Gruwell [ USNM] .

Comments.

The holotype of C. conradti was compared to a specimen of C. camerunum determined by Hagedorn in ZMHB, which is possibly the holotype. The type of C. conradti has slightly shorter elytral setae and is less shiny than camerunum , but this is very likely within species variation.

Figures

Figures 39–47. Dorsal, lateral, and front views of 39, 42, 45 Ctonoxylon camerunum female 40, 43, 46 Ctonoxylon cornutum female holotype, and 41, 44, 47 Ctonoxylon torquatum sp. nov. female holotype.