Usomyrma
... that the extinct ant Usomyrma was thought to be ancestral to spider ants when first described?
... that the extinct ant <i id="mwmA"><b id="mwmQ"><a href="./Usomyrma" id="mwmg" rel="mw:WikiLink" title="Usomyrma">Usomyrma</a></b></i> was thought to be ancestral to <a href="./Leptomyrmex" id="mwmw" rel="mw:WikiLink" title="Leptomyrmex">spider ants</a> when first described?