Raymondinidae are the only family in the trilobite superfamily Raymondinacea, which lived during the Middle and Upper Cambrian.

Taxonomy

The Raymondinidae consists of three subfamilies, but is assumed to be

polyphyletic A polyphyletic group is an assemblage that includes organisms with mixed evolutionary origin but does not include their most recent common ancestor. The term is often applied to groups that share similar features known as Homoplasy, homoplasies ...

. * Raymondininae ( = Pilgrimiidae) :''Raymondina'', ''Amquia'', '' Exigua'' ( = ''Brassicicephalus''), ''Llanoaspidella'', ''Paracedaria'' * Cedariniinae :''

Cedaria ''Cedaria'' is an extinct genus of trilobites from the late Cambrian. It is a small, rather flat trilobite with an oval outline, a headshield and tailshield of approximately the same size, 7 articulating segments in the middle part of the body a ...

'', ''Cedarina'' * Llanoaspidinae :''Llanoaspis'', ''Arcuolimbus'', ''

Genevievella ''Genevievella'' is a genus of trilobites with a short inverted egg-shaped outline, a wide headshield, small eyes, and long genal spines. The backrim of the headshield is inflated and overhangs the first of the 9 thorax segments. The 8th thorax s ...

'', ''Metisaspis''

References

Ptychopariida Trilobite families Cambrian trilobites Cambrian first appearances Cambrian extinctions {{Ptychopariida-stub