| Name:
Phylum Arthropoda; Rectifacies abnormalis
Geological
Time: Early Cambrian (~525 million years ago)
Size (25.4mm=1
inch): 40 mm long and 39 mm across on a 55 mm by 45 mm matrix
Fossil
Site: Chengjiang Biota - Quiongzhusi Section, Yu’anshan Member,
Heilinpu Formation, Ercaicun Village, Anning, Kunming, Yunnan Province,
China
Code: CJF548
Price: $595.00
- sold
 Description:
This rare arthropod is known as Rectifacies abnormalis. The species
was one of the larger arthropods found in the Chngjiang Biota, with
examples 12 cm in overall length known.. The diversity of soft-tissue
fossils 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
taxon has a distinctive plogally-ornamented surficial detail not
known from any other arthropod from the region. This trilobite-like
form is thought most closely related to Emeraldella and Sidneyia
from the younger Burgess Shale.
|
|
