30590 - Beautiful 1.62 Inch Hollardops merocristata Middle Devonian Trilobite Weberides Plesioserranus

Plesioserranus

Beautiful cranial dermal plate of an indeterminate crocodile from the Upper Cretaceous

such as this sharp spine in its flipper

Trilobita - Crepicephalidae

making reference to their age

30590 - Beautiful 1.62 Inch Hollardops merocristata Middle Devonian Trilobite Weberides PlesioserranusHollardops, Morzadec 1997 (trilobite) Trilobita Phacopida Acastidae PaleoDB taxon number: 259049 Synonyms: Modellops Lieberman and Kloc 1997 (no. 259054), Philipsmithiana Lieberman and Kloc 1997 (no. 259046) Parent taxon: Acastidae according to P. A. Jell and J. M. Adrain 2002 See also Lieberman and Kloc 1997 Sister taxa: Acastava, Acaste, Acastella, Acastellina, Acastocephala, Acastoides, Acastopyge, Alcaldops, Armorigreenops, Asteropyge,