Drepanaspis

Drepanaspis (from 'sickle' and 'shield') is an extinct genus of heterostracan armoured jawless fish from the Early Devonian (approximately 416 - 397 mya). Drepanaspis are assumed to have lived primarily in marine environments and is most commonly characterized by their ray-like, heavily armoured bodies, along with their lack of paired fins and jaws.

== History and discovery == The first fossils of the genus Drepanaspis, scientifically known as D. gemuendenensis of Schlüter, were found in 1887 from the Gemünden slate in the Hunsrück lagerstätte of Rhineland, Germany and was first described by Clemens August Schlüter. These fossils were also most notably studied and described by Scottish palaeoichthyologist Ramsay H. Traquair who created the first outline restorations from articulated specimens of Drepanaspis.