The genus Adelomyrmex is known from the Neotropical and Australian-Pacific Regions with 12 described species (Bolton, 1995; Fernández & MacKay, 2003), while Baracidris (Bolton , 1981) is a genus with 2 described species from Central and Western Africa. Bolton (1981) suggested that Baracidris is close to Adelomyrmex , based on the shared possession of antennae 12 segmented with 2 segmented club, and established the differences between both taxa. However, this suggested proximity was not reflected in the classification of the subfamily.
I propose that both genera form a monophyletic group and I redescribe Adelomyrmex . A revision of all known species of the group is provided, including the description of new species.
The taxonomic history of the group is short. Emery (1897) proposed Adelomyrmex to acommodate a single species, A. biroi from New Guinea. Wheeler (1910) described the genus Apsychomyrmex for a Mesoamerican species, A. myops . Smith (1947) later reviewed this genus. Kempf (1972) placed Apsychomyrmex as a junior synonym of Adelomyrmex . Mann (1921) proposed Arctomyrmex as a subgenus of Adelomyrmex , a name synonymized under Adelomyrmex by Bolton (1994). Bolton (1981) described Baracidris and suggested its close relationship with Adelomyrmex .
Forel (1917) placed Adelomyrmex and Apsychomyrmex in the tribe Leptothoracini . Kempf (1972) put Adelomyrmex in the tribe Leptothoracini ; Hölldobler & Wilson (1990) left Adelomyrmex and Baracidris without tribal assignation, and Bolton (1994) placed both genera provisionally in Stenammini .
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