Monomorium hanneli species group

based on Bolton, 1987

Species

 * Monomorium guineense
 * Monomorium hanneli
 * Monomorium invidium
 * Monomorium jacksoni

Diagnosis
Worker Monomorphic. Mandibles unsculptured, with 4 teeth which decrease in size from apex to base. Palp formula 2 ,2 (Monomorium jacksoni, Monomorium hanneli, Monomorium invidium). Median portion of clypeus with a pair of sharply defined posteriorly convergent raised carinae, which terminate at the anterior margin in a pair of short teeth. Frontal lobes close together, the median strip of clypeus which runs between them narrow, narrower to only fractionally wider than either of the frontal lobes. Eyes small, the maximum diameter 0.13-0.18 x HW; the eyes always with more than 5 ommatidia in total but less than 25, situated in front of the midlength of the sides of the head. Antennae with 12 segments, terminating in a large 3-segmented club. Head moderately broad and scapes relatively short, CI 81-90, SI 75-86. Propodeum usually very finely transversely sculptured, sometimes smooth, bluntly angular to bluntly bidentate where the dorsum meets the declivity. Petiolar peduncle short in profile, the node high and the spiracle behind the level of the anterior face of the node. Cephalic dorsum unsculptured except for h air-pits; lateral portions of clypeus, area immediately behind lateral portions of clypeus and area around antennal fossae without striolate or fine costulate sculpture. Fine standing hairs present on all dorsal surfaces of head and body. (Workers examined: all species of the group.)

Female Only very slightly larger than the conspecific worker. As worker but with proportionately much larger eyes, ocelli present, and alitrunk with a full complement of flight sclerites. HW distinctly greater than the maximum width of the mesoscutum, the latter as broad as long or slightly broader than long. In dorsal view the pronotum forming a part of the dorsal alitrunk, appearing as a broad transverse collar in front of the mesoscutum and being much wider laterally than mesally. Parapsidal grooves conspicuous to vestigial. Axillae in dorsal view wedge-like and with a gap between their inner apices; the length of the gap about equal to the length of one of the axillary sclerites. Propodeum bluntly angular to low bidentate at junction of dorsum and declivity. (Females examined: jacksoni, invidium.)

Additional Resources

 * Monomorium
 * Monomorium species groups