carinae modestly reticulated posterior to eye level

Posterolateral lobes with longitudinal carinae only occasionally being intersected by much shorter transverse carinae to form a patches of rugoreticulation. This character, combined with the presence of antennal scrobes, is used to separate the major worker of Pheidole fervens and Pheidole teneriffana from that of Pheidole obscurithorax (which has a much denser network of rugoreticulum).