Genuine Natural Clustered Trilobites in Matrix (19 lbs)
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Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in the second half of the Lower Cambrian period. Trilobites have facial sutures that run along the margin of the glabella and/or fixigena to the shoulder point where the cephalon meets the thorax. These sutures outline the cranidium, or the main, central part of the head that does not include the librigena (free cheeks).
*You will receive the exact object in these photos. Certificate of authenticity included.
Weight: 19 lbs, Size: 28 x 1 x 11 inches