''Palaeophyllites'' is a genus of

ammonoid Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

s from the Lower Triassic and a contemporary of the related ussuritid '' Eophyllites''. The shell of ''Palaeophyllites'' is evolute, inner whorls generally smooth, outer whorl with irregular ribs. Sutures are basically ceratitic with digitate lobes and simple rounded monophyllic saddles. ''Paleophyllites'' differs from contemporary Eophyllites in having ribs on the outer part of the terminal whorl and lobes that are more quadrate in outline. Like ''Eophyllites'', ''Palaeophyllites'' is ancestral to genera like ''

Ussurites ''Ussurites'' is an extinct ammonoid cephalopod genus belonging to the suborder Phylloceratina and is included in the family Ussuritidae. Its range is restricted to the early Middle Triassic, (Anisian) As with the family, the shell of ''Ussurit ...

'' and ''

Monophyllites ''Monophyllites'' is an extinct cephalopod genus belonging to the family Ussuritidae that lived during the Triassic period, from Anisian to Ladinian age. Description "Form evolute laterally compressed. Whorl low and increasing slowly in height, ...

''.

References

* W.J. Arkell ''et al.'', 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press
Sepkoski's list of Cephalopod Genera
Ammonitida genera Triassic ammonites Ammonites of Europe {{ammonite-stub