Ectateus ghesquierei Koch, 1956

Kaminski, Marcin Jan, 2014, A cladistically based reinterpretation of the taxonomy of two Afrotropical tenebrionid genera Ectateus Koch, 1956 and Selinus Mulsant & Rey, 1853 (Coleoptera, Tenebrionidae, Platynotina), ZooKeys 415, pp. 81-132 : 93-94

Ectateus ghesquierei Koch, 1956 Figs 5, 33, 41, 48

Ectateus ghesquierei Koch, 1956: 232. - Iwan 2002a: 67, 2002b: 265.

Studied material.

Six syntypes of Ectateus ghesquierei are available. Lectotype designation is needed to fix the taxonomic status of the genus and the species. Lectotype designated here, (MRAC): “Musée du Congo Belge, Kasai: Kondué, E. Luja"; Paralectotypes, 3 females (MRAC): same data, 2 females (MRAC): "Coll. Mus. Congo, Mayidi, 1943, Rév. P. Van Eyen". Other material: female (MNHN): "Voka Congo, X.1977", male and female (MNHN): "2.11.1963., No 78, sifted litter, leg. Endrõy-Younga” "Soil-Zoological Exp., Congo-Brazzaville, Kindamba, Méya, Louolo river".

Redescription.

Habitus as in Fig. 48. Body length = 8.0-9.0 mm. Elytra wider and longer than pronotum (width ratio elytra / pronotum = 1.1-1.2; length ratio elytra / the middle of pronotum = 2.5-2.6).

Dorsal side of head dull, with punctures (the intervals between the punctures are smaller than the diameter of the puncture). Frontoclypeal suture coarse. Clypeal emargination relatively deep (clypeal emargination width / depth ratio = 9.0-9.3). Mentum with median part narrow. Submentum with short base. Maxillary palp not widened (width of maxillary palp / length of 3rd antennomere = 1.0-1.1). Length of antennae greater than pronotal length (ratio antenna / pronotum from tip of anterior pronotal angle to tip of posterior pronotal angle = 1.1-1.2). 3rd antennomere relatively long (length ratio of antennomere 3rd / 2nd = 2.7-3.0).

Pronotal disc transverse (middle of pronotum length / width ratio = 0.4-0.5); dull, with coarse punctures (the intervals between the punctures are smaller than the diameter of the puncture). Anterior pronotal angles sharp and protruding outwards. Lateral margins of pronotum sinusoidal. Apophyseal and basal depressions on pronotal disc present; apophyseal depressions rounded (Fig. 5). Pronotal hypomera shiny; without punctures.

Elytra oblong (elytra length / width ratio = 1.1-1.3). Elytral striae with conspicuous punctures; intervals convex, with transverse sculpture. Elytral base slightly rounded. Elytral humeri rounded, not protruding laterad. Wings absent. Scutellum triangular, situated in a depression.

Intercoxal process protruding towards mesoventrite, peaked at the apex, slightly saddle-shaped. Metaventrite reduced (length ratio cavity of hind coxa / metaventrite between the insertions of mid and hind coxae ca. 2). In both sexes abdominal process without tubercles; relatively narrow (process of 1st abdominal ventrite / process of metaventrite = 2.0-2.2). 5th abdominal ventrite without bordering; punctures fine (the intervals between the punctures are greater than the 2 diameters of the puncture).

Male legs. Protarsi slightly narrow. Protibiae as in Fig. 33. Mesotibiae with large denticle. Metafemorae without fringle of hairs. Female legs simple.

Male genitalia. Parameres narrowest in the half of their length; length equal to the 0.2 of the rest of aedeagal tegmen. Clavae hook-shaped. Female genitalia. Paraproct equal to coxites. Bursa copulatrix without sclerites. Spermatheca with narrow ducts.

Distribution.

This species has been collected in the following ecoregions of Central Africa (Democratic Republic of the Congo, Republic of the Congo): Southern Congolian forest-savanna mosaic, Western Congolian forest-savanna mosaic (Fig. 41).