prognathous

Definition

Having mouthparts that project forward from the head, typically seen in certain insects.

Etymology

From Greek 'pro-', meaning 'forward', and 'gnathos', meaning 'jaw'.

Example

The prognathous mouthparts of beetles are adapted for biting and chewing.

Synonyms

• Forward-facing mouthparts

Related Terms

• Hypognathous
• Opisthognathous
• Mandibles
• Head capsule

Usage Notes

Prognathous conditions are contrasted with hypognathous (downward-facing) and opisthognathous (receding) mouthpart orientations.