Nipponites

Nipponites
Nipponites
Temporal range: Turonian to Santonian
Nipponites mirabilis, N. bacchus, and Yezoceras nodosum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Suborder: Ancyloceratina
Superfamily: Turrilitaceae
Family: Nostoceratidae
Genus: Nipponites
Yabe, 1904
Species
  • N. mirabilis Yabe, 1904 (type species)
  • N. bacchus Matsumoto and Muramoto, 1967
  • N. occidentalis
  • N. sachalinensis

Nipponites ("stone of Nippon") is an extinct genus of heteromorph ammonites. The species of Nipponites (primarily N. mirabilis) are famous for the way their shells form "ox-bow" bends, resulting in some of the most bizarre shapes ever seen among ammonites.

The ecology of Nipponites, as with many other nostoceratids, is subject to much speculation.