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Different types of anatomy. 1  Gross anatomy involves anything that could be seen with your unaided eye. 2  Surface anatomy is a subset of gross anatomy that is anything that can be revealed on the skin. 3  Microscopic anatomy is known as histology which is the study of tissues.
Trilobite facial sutures on the dorsal side can be roughly divided into five main types according to where the sutures end relative to the genal angle (the edges where the side and rear margins of the cephalon converge). Opisthoparian-The facial suture ends at the posterior margin of the cephalon. 2  Example genera showing this type of suture include Peltura of Olenina (Ptychopariida) and Bumastus of Illaenina (Corynexochida). 3  This is the most common type of facial suture.