Fig. 4. Dorsal view of head, showing: A) Cephalic median longitudinal carina present, extending from the anterior clypeal margin to the vertex (Acanthoponera minor—CASENT0178699); B) Cephalic median longitudinal carina not extending from the anterior clypeal margin to the vertex (Ectatomma tuberculatum— CASENT0173380); C) Cephalic median longitudinal carina absent (Holcoponera striatula—CASENT0173386). Photos by April Nobile; available from www. antweb.org (Antweb 2021).