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Trilobites
- Classification
- Phylum: Arthropoda
- Class: Trilobita
- Phylum: Arthropoda
- Evolved in the Cambrian
and became extinct in the
Permian
- The arthropod skeleton
- A hard exoskeleton Made of CHITIN
- Tough
- The exoskeleton act as an anchorage
for muscles
- Tough
- A hard exoskeleton Made of CHITIN
- Morphology
- Cephalon
- The compound eyes
- Calcite
- Wide-angled vison
- Calcite
- Glabella
- The compound eyes
- Thorax
- Thoracic segements
- Left pleural lobe
- Right pleural lobe
- Axial lobe
- Left pleural lobe
- Individual plates articulated
together
- very flexible
- trilobites are able to enroll
- a defensive mechanism
- a defensive mechanism
- trilobites are able to enroll
- very flexible
- Thoracic segements
- Pygidium
- Several segments fused
together
- Several segments fused
together
- Cephalon
- Ecdysis
- The process of shedding
the exoskeleton
- Fracturing along the
lines of weakness
- Facial sutures
- Facial sutures
- Fracturing along the
lines of weakness
- Left the trilobite
vulnerable to predators
- the skeleton is
temporarily flexible to
allow stretching to
accommodate a
larger animal
- The process of shedding
the exoskeleton
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