Cephalon (anatomy)

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Cephalon on a trilobite

The first Tagma of many crabs and trilobites is called a cephalon (from ancient Greek κεφαλή head , German name: head shield or head section ) .

The trilobites have the compound eyes , the fixed cheeks (fixigena), the free cheeks (librigena), the hem including the doublures (the tips of the hem towards the back) and the so-called glabella , which is the extension of the spindle (axial lobe) on the upper side ) on the head shield. On the underside are the rostral plate and the hypostome , which presumably belonged to the oral apparatus.

  • Upper side of the cephalon in trilobites

  • Underside of the cephalon in trilobites

Individual evidence

  1. ↑ The Trilobite Cephalon at trilobites.info, accessed April 16, 2009
  2. ↑ Trilobite Dorsal Morphology at trilobites.info (English), accessed April 16, 2009
  3. ↑ Trilobite Ventral Structures at trilobites.info (English), accessed April 16, 2009