Mandibles

Homology Weekly: Mandible Adductor Apodemes

Thursday, September 24th, 2009 | Ants, Comparative Anatomy, Homology Weekly, Morphology | 7 Comments
The unusual mandible closer apodeme (left one in the pair) of species in the Odontomachini genus group. Disected out and cleared from all muscles (Scanning Electron Micrograph, Roberto Keller/AMNH)

The unusual hook-shaped mandible closer apodeme (left one in the pair) of species in the Odontomachini genus group (Anochetus emarginatus pictured here). Piece dissected out and cleared from all muscles (Scanning Electron Micrograph, Roberto Keller/AMNH)

Last August, before taking a break from blogging, I posted an impossible-to-answer trivia. It consisted of the image above depicting an unidentified mysterious skeletal piece (sclerite) in the shape of a hook, together with two key pieces of information: a) it is entirely internal; b) it comes in pairs. › Continue reading

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Homology Weekly: Mouthparts

Tuesday, April 21st, 2009 | Ants, Homology Weekly, Morphology | 9 Comments
Frontal part of the head in an <em>Anochetus emarginatus</em> worker, profile view (Scanning Electron Micrograph, Roberto Keller/AMNH)

Frontal part of the head in an Anochetus emarginatus worker, profile view (Scanning Electron Micrograph, Roberto Keller/AMNH)

This image shows the mouthparts of a trap-jaw ant in resting position. The only structures really visible are the prominent elongated mandibles (in yellow) that project forward. The rest of the pieces, laying immediately below, are retracted inside the preoral cavity.

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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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