Phlaeopterus species size variation. A) Phlaeopterus bakerensis, the largest species: maximum length ~ 10 mm; B) Phlaeopterus kavanaughi, a large, wide bodied species, maximum length ~ 7.6 mm; C) Phlaeopterus elongatus, a large, elongate species, maximum length ~ 6.4 mm, and D) Phlaeopterus obsoletus, one of the smallest species: maximum length ~ 3.9 mm.