Notoceras
(Eubostrychoceras) indopacificum Phylum
Mollusca, Class Cephalopoda, Subclass
Ammonoidea, Order Ammonitida, Suborder Ancyloceratina, Family Notoceratidae
Geological
Time: Late Cretaceous, Coniacian Stage (~89 million years ago)
Size: 116
mm long by 70 mm wide, 30 mm across (uncoiled length 220 mm)
Fossil Site:
Madagascar
Description:
This is an exceptionally fine heteromorphic ammonite that has been
professionally prepared to display its beauty in 3-D. It has what
is known as heteromorph shape. While most ammonites have spiral
shells that retain the same shape throughout growth (homomorph),
a major group of ammonites, the Ancyloceratina, emerged during the
Late Jurassic which had uncoiled shells instead, and were called
heteromorph ammonites (different-shaped). While little is known
of their mode of life, their uncoiled shells would have precluded
fast swimming. They may have wobbled their way through the water
column with out-splayed tentacles, sweeping whatever came within
their reach into their hungry mouths.
Also
see: Other Ammonite
Fossils |
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