- Wutinoceratidae.
Cyrtonybyoceras and
Wutinoceras are similar,
except for
Cyrtonybyoceras being slightly cyrtoconic, and
almost intergrade.
Cyrtonybyoceras is so...
- Europe.
Wutinoceras is the
earliest and gave rise to
Cyrtonybyoceras and Adamsoceras.
Cyrtonybyoceras left no descendants, but
Adamsoceras gave rise to the...
- †Cyrtoceratites †Cyrtocerina †Cyrtocheilus †Cyrtogomphoceras †Cyrtogomphus †
Cyrtonybyoceras †Cyrtorizoceras †Cyrtospyroceras †Cyrtothoracoceras †Dakeoceras †Dalecarlioceras...
- E -
early M Ord (Whiterock); Asia, Aunt N Am. N Eur. Wutinoceras,
Cyrtonybyoceras, Adamsoceras, ........ Polydesmiidae,
Kobayashi 1940; ?late E- M Ord...
- Wutinoceras,
thereby precluding the possibility.
Wutinoceras gave rise to
Cyrtonybyoceras with the
development of a curved,
cyrtoconic s**** and to Adamsoceras...
