Xenoceltites
{{Automatic Taxobox
| fossil_range = {{fossilrange|Olenekian}}
| taxon = Xenoceltites
| authority = Spath, 1930
| subdivision_ranks =
| subdivision =
}}
Xenoceltites is an extinct genus of ceratite ammonoid found worldwide in the Lower Triassic.{{Cite web |title=The Paleobiology Database |url=https://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_name=Xenoceltites}}{{cite journal |last1=Piazza |first1=Veronica |last2=Hammer |first2=Øyvind |last3=Jattiot |first3=Romain |year=2017 |title=New late Smithian (Early Triassic) ammonoids from the Lusitaniadalen Member, Vikinghøgda Formation, Svalbard |journal=Norwegian Journal of Geology |volume=97 |issue=2 |pages=105–117 |doi=10.17850/njg97-2-03|s2cid=134244921 |doi-access=free |url=https://www.zora.uzh.ch/id/eprint/139383/1/PIAZZA%2C_HAMMER_%26_JATTIOT._2017.pdf }}
Diagnosis
One of the earliest ceratites, Xenoceltites has a narrow planospiral shell with a compressed whorl section, that has a suture with two weakly toothed lateral lobes and irregular ribbing.
Classification
Xenoceltites belongs to the Xenoceltitidae, a family within the order Ceratitida that with two others form the superfamily Xenodiscaceae.{{cite book |last1=Arkell |first1=W.J. |last2=Furnish |first2=W. M. |last3=Kummel |first3=B. |last4=Miller |first4=A. K. |last5=Moore |first5=R. C.|last6=Schindewolf |first6=O. H. |last7=Sylvester-Bradley |first7=P. C. |last8=Wright |first8=C. W. |year=1957 |editor= R.C. Moore |chapter=Part L—Mollusca 4, Cephalopoda, Ammonoidea |title=Treatise on Invertebrate Paleontology |series=Geological Society and University of Kansas Press |isbn=0-8137-3012-0}}