Ancient Seas, Morocco, Alnif, Hamar Ladad Formation, Devonian Period, ca. 416 to 359.2 million years ago; North America, Midwestern United States, Ohio, Silica formation, Mid Devonian Period, ca. 387.7 million years ago. A fine collection of four trilobite fossils and brachiopods, each in a stone matrix. The first is a species of Philipsmithia hyfinkeli, with the genal spines protruding from the sides of the head. The second fossil is a Thysanopeltis speciosa, with distinctive, lengthy tail spines. The next is Phacops speculator and has been excavated to show off almost all sides of the trilobite. Last is a shale matrix that exhibits both a Phacops rana type of trilobite and fossilized brachiopods. The brachiopods are type of prehistoric clam, and here their exposed shells have pyritized and have a lovely glimmering golden hue. Size of largest shale: 6" L x 4" W x 1.75" H (15.2 cm x 10.2 cm x 4.4 cm); smallest matrix: 2" L x 1.5" W (5.1 cm x 3.8 cm)
Lucite stands for photography purposes only.
Provenance: ex-Stein collection, Bloomfield Hills, Michigan, USA, acquired prior to 2010
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#164007
Condition
Professionally prepared and excavated. Repairs to matrixes and small areas of infill on fossils. Thysanopeltis: repaired from 5 pieces with stable fissures across the rear end of trilobite. Philipsmithia: genal spine is reattached. Phacops Stable fissure across matrix and trilobite with infill along fissure. Phacops rana: active flaking to matrix and matrix is repaired from three pieces.