30353 - Top Rare 0.43 Inch Harpidella misera Silurian Trilobite - Czech Republic Primitive arthropods Burminresia

Burminresia

the reabsorption of the olivines and the pyroxenes overgrowth indicate a complex evolution of the magma

This piece has a complicated taxonomic assignation

Ptychagnostus punctuosus

Royal Tyrrell Museum of Paleontology

30353 - Top Rare 0.43 Inch Harpidella misera Silurian Trilobite - Czech Republic Primitive arthropods BurminresiaHarpidella, McCoy 1849 (trilobite) Trilobita Aulacopleuridae PaleoDB taxon number: 21197 Parent taxon: Aulacopleurinae according to A. W. Owen and D. A. T. Harper 1982 See also Jell and Adrain 2002, Owen 1981, Owen and Bruton 1980, Owens and Fortey 2009, Sepkoski 2002 and Thomas and Owens 1978 Sister taxa: Otarionides, Pseudotrinodus Subtaxa: Harpidella (Harpidella), Harpidella (Rhinotarion), Harpidella megalops, Harpidella occidentalis, Harpidella