Mandible (in frontal view) of female A E. ainsliei without a preapical angulation or tooth B E. attenboroughi holotype with an inconspicuous, obtuse preapical tooth C E. carolinus with an inconspicuous, obtuse preapical tooth D E. gibbsi paratype with an obtuse angle appearing like a tooth E E. vernalis holotype (herein synonymized under E. ilicis) without a preapical angulation or tooth, and F E. compactus with a distinct preapical tooth with sides forming a right triangle. Scale bars 0.5 mm.