Palaeolenus
lantenoisi
(Mansuy,
1912)
Trilobites
Order Ptychopariida, Family Palaeolenidae
Geological
Time: Early Cambrian (~525 million years ago)
Size (25.4
mm = 1 inch): Trilobites are 4-8 mm long on a 36 mm by 29 mm matrix
Fossil
Site: Chengjiang Biota - Quiongzhusi Section, Yu’anshan Member,
Heilinpu Formation, Caijiachong Valley, Yunnan Province, China
Code: CJF426
Price: $195.00
 Description:
This trilobite assemblage is a group of members of the Order Ptychopariida
from the Early Cambrian Heilinpu Formation deposits of the Caijiachong
Valley, Yunnan Province, China, known as Palaeolenus . The diversity
of soft-tissue fossils from the Cjengjiang Biota is astonishing:
algae, medusiforms, sponges, priapulids, annelid-like worms, echinoderms,
arthropods (including trilobites), hemichordates, chordates, and
the first agnathan fish make up just a small fraction of the total.
Numerous problematic forms are known as well, some of which may
have represented failed attempts at diversity that did not persist
to the present day.
This is a well-preserved grouping of mostly counterpart
examples of trilobites from the Chengjiang Biota that made up a
glimpse of the Cambrian Explosion some 5-10 million years before
the Burgess Shale fauna came into being.
Also
see: Chengjiang
Biota Fauna List Chengjiang
Fossils |
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