Monodius

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Taxonavigation

Ordo: Coleoptera
Familia: Tenebrionidae

Name

Monodius Koch, 1956 stat. r. – Wikispecies link – Pensoft Profile

• Monodius Koch, 1956: 181. – Iwan 2001b: 352, 2002a: 100 (syn. with Selinus).

Type species

Selinus convexipennis Gebien, 1904; by original designation.

Diagnosis

The following character combination is unique for Monodius within the whole subtribe Platynotina: (1) antennomeres from 7 to 11 elongated (their length greater than the width), (2) anterior tentorial pit deep, clearly visible, (3) 5th abdominal ventrite strongly widened, (4) female protarsi widened, (5) penis wide, at least 4 times wider than clavae, (6) clavae long, their length more than half of the length of parameres, (7) apex of parameres fused and (8) bursa copulatrix with 2 additional sacs.

Distribution

Monodius specimens have been collected in the following ecoregions of West and Central Africa (Burkina Faso, Cameroon, Federal Republic of Nigeria, Ivory Coast, Republic of Benin, Republic of Ghana, Republic of Liberia, Republic of Niger, Sierra Leone, Togolese Republic): Cross-Sanaga-Bioko coastal forests, Atlantic Equatorial coastal forests, Central African mangroves, Eastern Guinean forests, Guinean forest-savanna mosaic, Mount Cameroon and Bioko montane forests, Northern Congolian forest-savanna mosaic, Northwestern Congolian lowland forests, West Sudanian savanna, Western Guinean lowland forests (Figs 42–43).

Species included (7)

Monodius convexipennis (Gebien, 1904), Monodius gravis Koch, 1956, Monodius laevistriatus (Fairmaire, 1897), comb. n., Monodius lamottei (Gridelli, 1954), comb. n., Monodius malaisei Koch, 1956, Monodius medius (Fairmaire, 1897), Monodius plicicollis (Fairmaire, 1897), comb. n.

Key to the species of Monodius

Key to the species of Monodius — M. Kamiński

1		Elytral surface dull. Margins of elytra in the basal part subparallel (elytral humeri slightly protruding outwards). Denticle at the apex of the inner face of male mesotibia large (Fig. 7). Apex of parameres emarginated at the apex (Figs 15, 17)    2
–		Elytral surface shiny. Margins of elytra in the basal part rounded. Denticle at the apex of the inner face of male mesotibia small or absent (e.g. Fig. 29). Apex of parameres connected (Figs 14, 16)    4
2		Pronotal apophyseal depressions coarse. Male mesofemorae with a denticle (similar to the one in Ectateus laevistriatus, Fig. 40). Parameres strongly emarginated at the apex (Fig. 15)    Monodius plicicollis
–		Pronotal apophyseal depressions fine. Male mesofemorae wihout denticles. Parameres slightly emarginated at the apex (Fig. 17)    3
3		Male protibiae with median dilatation on the inner face (similar to the one in Monodius convexipennis, Fig. 37)    Monodius medius
–		Male protibiae almost straight (Fig. 38)    Monodius malaisei
4		Body size: 16.0–19.0 mm. Elytral intervals with fine punctures (Fig. 26). Male protibiae as in Fig. 30    Monodius gravis
–		Body size: 12.0-14.5 mm. Elytral intervals with conspicuous punctures. Male protibiae as in Fig. 37    5
5		Pronotal disc with two circular depressions in the middle. Aedeagal tegmen as in Fig. 19    Monodius laevistriatus
–		Pronotal disc wtihout circular depressions. Aedeagal tegmen as in Fig. 16, 18    6
6		Elytral intervals with conspicuous punctures. Elytral apex as in Fig. 51. Aedeagal tegmen as in Fig. 16    Monodius convexipennis
–		Elytral intervals with very coarse punctures (Fig. 28). Elytral apex rounded. Aedeagal tegmen as in Fig. 18    Monodius lamottei

Taxon Treatment

• Kamiński, M; 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: 81-132. doi

Images

Figures 1–7. Head, dorsal view (1, 2), ventral view (4); antenna (3); pronotal disc (5, 6); mesotibia (7). Ectateus calcaripes (3), Ectateus crenatus (2), Ectateus ghesquierei (5), Monodius medius (7), Monodius plicicollis (4), Selinus planus (1, 6).  Figures 14–21. Aedeagal tegmina (dorsal and vental views). Monodius gravis (14), Monodius plicicollis (15), Monodius convexipennis (16), Monodius malaisei (17), Monodius lamottei (18), Monodius laevistriatus (19), Ectateus calcaripes (20), Selinus striatus (21).  Figures 26–30. Elytral disc (26, 27, 28); male mesotibia (29); male protibia (30). Monodius gravis (26, 29, 30), Ectateus calcaripes (27), Ectateus lamottei (28).  Figures 37–40. Male protibiae (37–39); male mesofemora (40). Monodius convexipennis (37), Monodius malaisei (38), Selinus planus (39), Ectateus laevistriatus (40).  Figure 42. Distribution of the species of Monodius convexipennis, Monodius gravis, Monodius laevistriatus, Monodius lamottei and Eleoselinus gen. n. The division of Afrotropical Realm into ecoregions was adopted after Olson et al. 2001. Different colors were used to distinguish the adjacent ecoregions.  Figure 43. Distribution of the species of Monodius malaisei, Monodius medius and Monodius plicicollis. The division of Afrotropical Realm into ecoregions was adopted after Olson et al. 2001. Different colors were used to distinguish the adjacent ecoregions.  Figures 50–54. Body habitus: Monodius convexipennis (50), Monodius gravis (52), Monodius laevistriatus (53) and Monodius lamottei (54). Apex of elytra of Monodius convexipennis (51).