Erromenosteus

Erromenosteus is a genus of extinct, medium-sized brachythoracid arthrodire placoderm from the Late Frasnian of the Kellwasserkalk facies of Late Devonian Bad Wildungen and Bicken, Germany.

The various species had bullet-shaped heads, and curved, crushing jaws.

As was mentioned, all known species are from the German Kellwasserkalk facies.

[1]: 94  Now, though, Erromenosteus is considered a basal member of Dinichthyloidea.

These species were originally classified within Leiosteus before the genus was synonymized with Erromenosteus.