Key to Odontomachus of the Malagasy region

These keys to workers, queens and males are based on: Fisher, B. L. and M. A. Smith. 2008. A Revision of Malagasy Species of Anochetus Mayr and Odontomachus Latreille (Hymenoptera: Formicidae). [http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0001787 PloS one. 3:e1787].

Key to workers and queens / Key to males

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 * Odontomachus
 * Ants of Madagascar

1

 * Head narrow behind eyes; mandible with long, acute apical and preapical teeth; vertex of head coarsely, transversely striate . . . . . Odontomachus coquereli


 * Head only slightly narrower across vertex than across eyes, with distinct extraocular furrows and temporal ridges; apical and preapical teeth of mandible short and blunt; vertex finely striate longitudinally, diverging behind . . . . . 2

2

 * Metasternal process acute, forming paired, slender spines, often unequal in length. Petiole spine notably bent posteriorly at base . . . . . Odontomachus troglodytes


 * Metasternal process low, rounded. Petiole spine slightly curved posteriorly, but not noticeably bent posteriorly at base of spine . . . . . Odontomachus simillimus

1M

 * Shortest distance between lateral ocellus and margin of compound eye smaller than maximum length of ocellus. Antenna with suberect setae; declivitous surface of propodeum without distinct rugae (Madagascar) . . . . . Odontomachus coquereli


 * Shortest distance between lateral ocellus and margin of compound eye distinctly greater than maximum length of ocellus. Antenna with very short appressed to decumbent setae; declivitous surface of propodeum with distinct rugae directed towards margins . . . . . 2M

2M

 * Body brownish yellow. Tarsal claw with small subapical tooth (Madagascar) . . . . . Odontomachus troglodytes


 * Body blackish or brown. Tarsal claw without subapical tooth (Seychelles) . . . . . Odontomachus simillimus