| Our phylogenetic results imply that an orthognathous larva belongs to the groundplan of Holometabola, with compound eyes and well-developed thoracic legs, externally feeding on plants or fungi. |
| Skulls with the gnathic index below 98 are orthognathous, from 98 to 103 mesognathous, and above 103 are prognathous. |
| Our phylogenetic results suggest that the ancestral larva of Holometabola was terrestrial, orthognathous, equipped with moderately simplified but distinctly developed compound eyes, and well developed thoracic legs. |
| At its northeastern end is the most round-headed, orthognathous, straight-haired, and yellow-skinned race. |
