Comprehensive Description

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Characteristics

Myrmeciinae was redefined by Ward and Brady (2003) to include Prionomyrmex and the newly revived genus Nothomyrmecia. They gave the following apomorphies of the subfamily (states for some of these characters are still unknown in fossil taxa), reiterated by Bolton (2003):
  • Mandibles multidentate and elongate
  • Eyes large, oval and conspicuously protruding from the surface of the head
  • Male scapes very short and stocky
  • Male mesepisternum lacking a distinct posterior oblique sulcus, with at most a weak furrow present
  • Metapleural gland opening overhung by flange and separated from ventral margin of metapleuron by a distance greater than the diameter of the opening
  • Third abdominal segment substantially smaller than fourth abdominal segment
  • Sting bulb gland present
  • Paramere divided by oblique longitudinal suture
  • Aedeagus with posteroventral projection, armed at the apex with stout teeth or spines

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