The metotic strut of "Troodon" was enlarged from side-to-side, similar to "Dromaeosaurus" and primitive birds like "Archaeopteryx" and "Hesperornis".
The metotic strut of "Troodon" was "laterally hypertrophied". This condition resembles that of "Dromaeosaurus" and primitive birds like "Archaeopteryx" and "Hesperornis".