Hypognathy

Homology weekly: Prognathy

Tuesday, February 2nd, 2010 | Ants, Comparative Anatomy, Homology Weekly, Morphology | 6 Comments

I am going to take advantage of figures I prepared for a talk I gave recently, where I had to explain a diagnostic characteristic of ants during the introduction. As I have mentioned before, ants are peculiar among wasps and bees in that their mouthparts are directed forward, rather than downward, in a condition known as prognathy (pro-, anterior, projecting; –gnathus, jaw).

Hypognathus condition in insects (left image from Wikimedia commons; right drawing modified after Snodgrass 1935)

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And as we discussed last semester, the Army Ants will leave nothing but your bones.
- Tom Waits

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