19005 - Top Rare Stephanodus Partial Dentary Late Cretaceous Fish Cyphaspis ("Devil Horned") Aglaspidida is an extinct order

Aglaspidida is an extinct order of aquatic arthropods that were once regarded as primitive chelicerates

This is 1 of 189 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite)

The formula of the admixture of the three most common endmembers is written as Ca10(PO4)6(OH

forming the Tetis Sea

Sometimes specimens will also have 'frothing' on the trailing side where the crust has literally bubbled

19005 - Top Rare Stephanodus Partial Dentary Late Cretaceous Fish Cyphaspis ("Devil Horned") Aglaspidida is an extinct orderRare species belonging to the Trigonodontoidae family. This type of specimens in the fossil record of the Upper Cretaceous phosphates of the Ouled Abdoun Basin are not common. Stephanodus sp, Zittel 1883 (ray finned fish) Osteichthyes Tetraodontiformes Trigonodontoidae Parent taxon: Trigonodontoidae according to G. R. Case and D. R. Schwimmer 1988 See also Kumar and Loyal 1987 Subtaxa: Stephanodus lybicus Ecology: nektonic carnivore Environments: