Trilobites 0.0 / 5 ? GeologyMorphology of FossilsA2/A-levelOCR Created by: James DisneyCreated on: 02-06-17 10:41 Compound eyes Many small calcite plates, allowed wide angle vision. 1 of 7 Facial sutures Line of weakness where the exoskeleton breaks first during ecdysis. 2 of 7 Free cheek Part of cephalon that breaks away from skeleton during ecdysis. 3 of 7 Fixed cheek Part of cephalon that remains attached to exoskeleton during ecdysis 4 of 7 Glabella Part of cephalon formed by presence of stomach inside the head. Shape may indicate diet. 5 of 7 Genal angle Part of cephalon which may have spines attached, probably for defence or to spread mass (larger surface area). 6 of 7 Antenna To detect environment 7 of 7
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