<![CDATA[This week’s Fossil Friday is a complete phacopid trilobite from the Ordovician, still in its shale matrix.]]>This week’s Fossil Friday is a complete phacopid trilobite from the Ordovician, still in its shale matrix. Trilobites are extinct arthropods with a distinctive three-lobed exoskeleton: a central axial lobe and the left and right pleural lobes.

This specimen was donated by Dr. Monika Shulz and is APS2013.002.

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]]>https://board.circlewithadot.net/topic/e348483c-1fd1-4d14-9ce3-1fd04fef9c8f/this-week-s-fossil-friday-is-a-complete-phacopid-trilobite-from-the-ordovician-still-in-its-shale-matrix.RSS for NodeThu, 23 Apr 2026 01:53:18 GMTFri, 17 Apr 2026 22:41:13 GMT60