''Desmophyllites'' is a small
desmoceratitid ammonite
Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...
characterized by a smooth and very involute shell that lived during the Santonian to Maachstrictian stages of the Late Cretaceous.
Shells of ''Desmophylites diphylloida'' from the upper Santonian are on order of 1.8 cm (0.7 in) in diameter. Those of ''Desmophylllites larteti'' from the upper Campanian are on order of 10.5 cm (~4 in) across.
References
* Arkell, et al, 1957. Mesozoic Ammonoidea,
Treatise on Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...
, Part L (L370-371). Geological Society of America.
* ''Desmophyllites'' i
Desmoceratinae
{{Taxonbar, from=Q16466651
Cretaceous ammonites
Ammonites of Europe
Ammonitida