21251 - Great Collection of 15 Hollardops merocristata Middle Devonian Trilobites Shark Teeth Collections Type species: Halisaurus platyspondylus Marsh

Type species: Halisaurus platyspondylus Marsh

The Upper Cretaceous was an important period in the evolution of the crocodiles because many terrestrial masses were splitting What is now Europe and Asia was moving away from Africa

Ecology: nektonic carnivore

The Fezouata Formation occurs in the lower part of the Lower to lower Middle Ordovician Outer Feijas Group

Year found: 1576

21251 - Great Collection of 15 Hollardops merocristata Middle Devonian Trilobites Shark Teeth Collections Type species: Halisaurus platyspondylus MarshGreat collection of 15 well preserved and prepared specimens. Hollardops sp, Morzadec 1997 (trilobite) Trilobita Phacopida Acastidae 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,