1) Lantern-jawed 2) Prognathic 3) Prognathous 1) Prognathic 2) Prognathous 
With head and mouthparts located ventrally when viewed from above
Having a vertical head and face with the mouth-parts at the bottom.
Having a congenitally defectively developed lower jaw. ... Origin: hypo-+ G. Gnathos, jaw ... (05 Mar 2000) ... 
Having a vertical head and face with the mouth-parts at the bottom.
Type: Term Pronunciation: hī-pog′na-thŭs Definitions: 1. Having a congenitally defectively developed small lower jaw.
mouthparts are directed downwards and backwards from the head from the insect's normal position
having the lower jaw or mandible longer than the upper.