NEW CHANCELLORIIDS FROM THE EARLY CAMBRIAN SEKWI FORMATION WITH A COMMENT ON CHANCELLORIID AFFINITIES
- 1 September 2005
- journal article
- Published by Cambridge University Press (CUP) in Journal of Paleontology
- Vol. 79 (5) , 987-996
- https://doi.org/10.1666/0022-3360(2005)079[0987:ncftec]2.0.co;2
Abstract
Articulated scleritomes of the chancelloriids Archiasterella fletchergryllus new species and Chancelloria cf. eros Walcott, 1920 are described from the Early Cambrian (Branchian) Sekwi Formation, Mackenzie Mountains, Northwest Territories, Canada. Early diagenetic, microbially mediated lithification has resulted in unusual three-dimensional preservation of the body surface, which potentially allows consideration of the evolutionary affinities of these enigmatic organisms. Sclerites are mounted on short stalks of the integument, connected to the undersurface of the central disc, and are external to the body surface.Keywords
This publication has 19 references indexed in Scilit:
- Mechanisms of fossilization of the soft-bodied and lightly armored faunas of the Burgess Shale and of some other classical localitiesAmerican Journal of Science, 2001
- A critical reappraisal of the fossil record of the bilaterian phylaBiological Reviews, 2000
- Spicule Formation in the Solitary Ascidian Bathypera feminalba (Ascidiacea, Pyuridae)Invertebrate Biology, 1998
- Neoproterozoic of the Mackenzie Mountains, northwestern CanadaPrecambrian Research, 1995
- Articulated halkieriids from the Lower Cambrian of North Greenland and their role in early protostome evolutionPhilosophical Transactions Of The Royal Society B-Biological Sciences, 1995
- The fossil record and the early evolution of the MetazoaNature, 1993
- The cap‐shaped Cambrian fossilMaikhanellaand the relationship between coeloscleritophorans and molluscsLethaia, 1992
- The Early Radiation and Relationships of the Major Arthropod GroupsScience, 1989
- Submarine carbonate breccia beds—a oppositional model for two-layer, sediment gravity flows from the Sekwi Formation (Lower Cambrian), Mackenzie Mountains, Northwest Territories, CanadaCanadian Journal of Earth Sciences, 1979
- Unter- und mittelkambrische Porifera (Chancelloriida und Hexactinellida)PalZ, 1969