Ectateus crenatus (Fairmaire, 1897)

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 : 90-92

Ectateus crenatus (Fairmaire, 1897) Figs 2, 8, 12, 34-36, 41, 46

Selinus crenatus Fairmaire, 1897: 121. - Gebien 1910: 277, 1938: 297.

Ectateus crenatus (Fairmaire, 1897). - Koch 1956: 235, Iwan 2002b: 265; Iwan and Banaszkiewicz 2007: 728.

Selinus monardi Kaszab, 1951: 2 (syn. nov.)

Ectateus latipennis Koch, 1956: 234 (syn. nov.). - Iwan 2002a: 67, 2002b: 266.

Notes.

While describing Ectateus latipennis , Koch has noted that types of Ectateus crenatus were unknown to him. The characters used by Koch to separate those two species (body size, pronotum structure) were based only on the Fairmaire (1897) description. During the examination of available material I have not found any consistent morphological characters to separate those two species. Therefore, I propose to consider Ectateus latipennis as a synonim of Ectateus crenatus .

The examination of the type material representing Selinus monardi resulted in similar conclusions - there are no consistent morphological characters to separate it from Ectateus crenatus .

Studied material.

Three specimens with “type” labels are available. Fairmaire (1897) do not specify the number of individuals on which he described this species. Lectotype designation is needed to fix the taxonomic status of the genus and the species. Lectotype designated here, male (MNHN): “TYPE”, "Museum Paris, 1906, Coll. L. Fairmaire", " Selinus crenatus "; Paralectotypes, male (MNHN), female (MNHN): “TYPE”, "Museum Paris, 1906, Coll. L. Fairmaire", " Selinus crenatus Farim 1896, Congo", female (MNHN): " Selinus crenatus Fm n. sp.", “TYPE”, "Museum Paris, 1906, Coll. L. Fairmaire", “Congo”. Other material: male (MRAC): “Musée du Congo, Barumbu - VIII-1925, (J. Ghesquière), S.A.R. Prince Léopold” (Holotype of Ectateus latipennis Koch, 1956), female (RBINS): "Ibembo, Itimbiri" (Allotype of Ectateus latipennis Koch, 1956), male (MNHN): "Kamerun, Joko" (Holotype of Selinus monardi Kaszab, 1951), male and female (MNHN): "Joko, Kamerun" (Paratype and allotype of Selinus monardi Kaszab, 1951), male and female (MNHN): "Cameroun, Dr. G. Nonveiller", male and female (MNHN): “Muséum Paris, Cameroun, B. de Miré”, 3 males and 2 females (MNHN): “Ogodué, Lambaréné, R. Ellenberger 1913", male (MNHN): "Congo Français, region D’ ouesso, Bassin N`Gokko-Sanga, Dr. J. Gravot 1906", male (MNHN): "Congo Français, Talagouga Prés N`Jolé, legit R. Ellenberger, E. Haug 1906", male and female (MNHN): “Ogooué, Sam-Kita", 3 females (MNHN): "Congo, Ogooué, Sam Kita, R. Ellenberger 1910", 2 males and 2 females (MNHN): "Gabon, Libreville et env.", male and female (MNB): "Span. Guinea, Nkolentangan, XI. 07-V.08, G. Teßmann S.G.", female (MNHN): "Benito, Congo Franc.", female (MNHN): "Gabon, Tholon", male and female (MNHN): "XII.1970, Mbalmayo, CAMEROUN, Mbarga leg.", female (MNHN): "Congo belge Centr., Kassai, Edm. Taymans, 1904", male (MHNG): "CAMEROUN VII.83, Etoubi Assok, à la lumière, F. Notari", female (MNB): "Neu-Kamerun, No. 3337-52, Tessmann S.G.", female (MRAC): "Coll. Mus. Congo, Mayumbe: Terr. Tshela, rég. de Mabuba VI-1958, Dr R. Laurent", male (MRAC): "Mus. Roy. Afr. Centr., Guinée Esp: Bata, Rév. P. Basilio", male (MNHN): "Kuilu, Fr. Congo., Mocquerys, 1892", male (RBINS): "Chutes de Samlia, Riv N. Gamie, Mocquereys".

Redescription.

Habitus as in Fig. 46. Body length = 7.0-9.0 mm. Elytra wider and longer than pronotum (width ratio elytra / pronotum = 1.1-1.2; length ratio elytra / the middle of pronotum = 2.4-2.6).

Dorsal side of head shiny, 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 = 5.7-6.5). Mentum with median part narrow. Submentum with short base. Maxillary palp not widened (width of maxillary palp / length of 3rd antennomere = 1.0-1.2). Length of antennae greater than pronotal length (ratio antenna / pronotum from tip of anterior pronotal angle to tip of posterior pronotal angle = 1.1-1.3). 3rd antennomere relatively long (length ratio of antennomere 3rd / 2nd = 2.8-3.0).

Pronotal disc transverse (middle of pronotum length / width ratio = 0.5-0.6); shiny, 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 pronotal disc sinusoidal. Apophyseal and basal depressions on pronotal disc present; apophyseal depressions rounded. Pronotal hypomera dull; without punctures.

Elytra oblong (elytra length / width ratio = 1.1-1.2). Elytral striae with coarse punctures (Fig. 8); intervals convex, with transverse sculpture and fine puncturation (Fig. 8). 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-like. 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 = 2.1-2.2). 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. 34. Mesotibiae and mesofemorae with large denticle (Figs 35-36). Metafemorae with an hair fringe. Female legs simple.

Male genitalia. Parameres narrowest in the half of their length; length equal to 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 (Cameroon, Democratic Republic of the Congo, Equatorial Guinea, Gabonese Republic, Republic of the Congo): Atlantic Equatorial coastal forests, Northern Congolian forest-savanna mosaic, Northwestern Congolian lowland forests, Southern Congolian forest-savanna mosaic, Western Congolian forest-savanna mosaic (Fig. 41).