The Ants of Africa
Genus Monomorium
Monomorium invidium Bolton

hanneli-group; guineense-complex

Monomorium invidium Bolton

return to key {link to the Hymenoptera Name Server} Type location Nigeria (Bolton, 1987: 427, illustrated, full-face view, and lateral profile, worker) collected at IITA by A. Russell-Smith, 28.iv.1981, holotype, 10 paratypes and one alate female .

{Monomorium invidium}Bolton's description (1987) is at {original description}.
Bolton (1987) noted a small variation between the many specimens he examined; TL 1.8-2.3, HL 0.46-0.65, HW 0.39-0.48; some without sculpturation on the propodeal dorsum and/or the lateral alitrunk; propodeum outline varying from narrowly to bluntly rounded to sharply obtusely angular. Even, so, from the specimens available to me and that I drew in Nigeria, it seems there are two variations in general form.  The one form (top pair) is perhaps slightly smaller and less dark, with a more rounded head and thicker pedicel segments.  The form illustrated by Bolton (1987, without any details of location), and photographed by me from a Cameroun specimen, is generally dark, near black, with a rectangular head and narrower. higher pedicel segments.  The latter, seems scarcely different from Monomorium guineensis.

From Ghana at Mampong (P.M. Room) (Bolton, 1987). It was described as widespread by Belshaw & Bolton (1994b), who found it very numerous workers (3432) from leaf litter samples, and 62 in soil samples, at nineteen locations in the semi-deciduous forest zone.

In Ivory Coast, at Sassandra, Banco National Park and Man (I. Löbl, probably March 1977), Bingerville and Issoneu (V. Mahnert & J.-L. Perret, October 1980), Nzi Noua (W.L. Brown) and Abidjan (T. Diomande) (Bolton, 1987).

Also Guinea, Mt. Nimba (Villiers); primary forest leaf litter in north-east of massif (Bernard, 1952). In Bernard's text under Monomorium occidentale as "co-types" but after examining the specimens, Bolton (1987) placed them with his newly defined species invidium.

From Cameroun, at Nko'emvon (D.A. Jackson) (Bolton, 1987).

{Monomorium invidium} Nigeria specimens (Monomorium species T³ in Taylor, 1980a: 33). WORKER. TL 1.87 mm, HL 0.47, HW 0.39, SL 0.31, PW 0.26
Colour very dark brown, appendages lighter, shiny with polished appearance. Lateral mesonotum punctate ventrally; propodeum with distinct dorsal and posterior surfaces; dorsal face margined, faint rugae ventro-laterally. Abundant semi-prone hairs on the head, moderately abundant erect hairs on the rest of the body. Petiole flattened in side view to a thick scale, the apex broadened in front view. Clypeal carinae well developed and extending forwards as sharp processes.

Collected by me from the base of a cocoa tree at the Cocoa Research Institute of Nigeria, Idi Ayunre (in Bolton, 1987); also from Nigeria, at CRIN (B. Bolton), and Ile-Ife (J.T. Medler).

Monomorium invidiumThe photomontage is of the holotype worker collated from

Oxford University Museum specimens

Monomorium invidium
B Taylor det.
G Debout & A Dalecky
Cameroon 58c

2°33.97' N
9°50.62' E
EBO, 70 m from village; flat terrain), 10 April 2001
on soil and surface at sardine oil bait
Monomorium invidium
B Taylor det.
A Feugang


sur le cadavre de rat, capture par le fillet

{Monomorium invidium}The photomontage is of a worker from Cameroun - south-western tropical coastal forest area between Edéa and Campo (McKey Wolbachia project; Cameroon 58c)

{Monomorium invidium}The photomontage is of a worker from Cameroun, A Feugang

© 2007, 2008, 2010, 2013 - Brian Taylor CBiol FSB FRES
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.