Plectoceras

Plectoceras

▪ fossil cephalopod
      extinct genus of small marine nautiloid cephalopods, forms related to the modern pearly nautilus, that had a coiled shell composed of a series of chambers; Plectoceras was active in the Ordovician Period (from 505 to 438 million years ago). The junctures between successive chambers of Plectoceras were simple in character.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Tarphycerida — Taxobox name = Ellesmerocerida fossil range = L Ordovician Devonian regnum = Animalia phylum = Mollusca classis = Cephalopoda subclassis = Nautiloidea ordo = Tarphycerida ordo authority = Flower 1950 The Tarphycerida were the first of the coiled… …   Wikipedia

  • Campbelloceras — Taxobox fossil range = L Ordovician name = Campbelloceras regnum = Animalia phylum = Mollusca classis = Cephalopoda subclassis = Nautiloidea ordo = Tarphycerida familia = Tarpyceratidae genus = Campbelloceras genus authority = Ulrich and Foerste …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”