''Liliaspis philippovae'' is an extinct cyathaspidiform

heterostracan Heterostraci (Ancient Greek, ἕτερος+ὄστρακον "those itha different shell" i is pl. of -us is an extinct subclass of pteraspidomorph jawless vertebrate that lived primarily in marine and estuary environments. Heterostraci exi ...

agnatha Agnatha (, Ancient Greek 'without jaws') is an infraphylum of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct ( conodonts and ostracoderms) species. Among recent animals, cyclosto ...

n from early

Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ...

marine strata of the

Ural Mountains The Ural Mountains ( ; rus, Ура́льские го́ры, r=Uralskiye gory, p=ʊˈralʲskʲɪjə ˈɡorɨ; ba, Урал тауҙары) or simply the Urals, are a mountain range that runs approximately from north to south through western ...

. ''Liliaspis'' was, at various times, placed in the families Cyathaspididae, Poraspididae, and Anglaspididae. Currently, it is placed in

Ariaspidae Ariaspidae is a family of extinct cyathaspidiform heterostracan agnathans in the suborder Cyathaspidida. Family Ariaspidae contains ''Ariaspis'', and its sister-taxa originally contained within Anglaspididae/Anglaspidinae, including ''Anglaspi ...

with ''

Ariaspis ''Ariaspis'' is an extinct genus of cyathaspidiform heterostracan agnathan. Fossils are found in marine strata of Canada and Europe from the late Silurian period until its extinction during the Early Devonian The Devonian ( ) is a geolog ...

'', and '' Listraspis'', and is considered to be closely related to the similar-looking ''

Paraliliaspis ''Paraliliaspis egregia'' is an extinct cyathaspidiform heterostracan agnathan from early Devonian marine strata of the Ural Mountains. ''Paraliliaspis'' was, at various times, placed in the families Cyathaspididae, and Anglaspididae. Current ...

''. ''

Anglaspis ''Anglaspis'' is an extinct genus of cyathaspidiform heterostracan agnathan. Fossils are found in marine strata of Europe, from the late Silurian period until the genus' extinction during the Early Devonian. As with other cyathaspidiforms, i ...

'' is considered the ancestor or sister-taxon of both ''L. philippovae'' and ''Paraliliaspis''.

References

Cyathaspidiformes genera Early Devonian fish of Europe Cyathaspidida {{Pteraspidomorphi-stub