Chancelloria

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Chancelloria
Temporal range: Early Cambrian–lower Upper Cambrian
An oblong piece of rock with fine interconnected starlike details representing the fossil
Detail of a fossil of Chancelloria eros, on display at the Naturhistorisches Museum, Vienna.
Scientific classification e
Kingdom: Animalia
Phylum: incertae sedis
Class: Coeloscleritophora
Order: Chancelloriida
Family: Chancelloriidae
Genus: Chancelloria
Walcott, 1920
Species
  • C. eros Walcott, 1920 (type)
  • C. pentacta Rigby, 1978[1]
  • C. drusilla Walcott, 1920
  • C. libo Walcott, 1920
  • C. yorkensis Walcott, 1920
  • C. maroccana Szduy, 1969[2]
  • C. lenaica Zhuravleva and Korde, 1955
  • C. symmetrica Vassiljeva, 1985
  • C. altaica Romanenko, 1968
  • C. racemifundis Bengtson, 1990

Chancelloria is a genus of early animal known from the Middle Cambrian Burgess Shale, the Comley limestone,[3] the Wheeler Shale,[1] the Bright Angel Shale[4] and elsewhere. It was first described in 1920 by Charles Doolittle Walcott, who regarded them as one of the most primitive groups of sponges.[5] This appears unlikely, and it is currently placed in the enigmatic group Coeloscleritophora [6] 178 specimens of Chancelloria are known from the Greater Phyllopod bed, where they comprise 0.34% of the community.[7]

External links[edit]

References[edit]

  1. ^ a b Keith Rigby, J. (1978). "Porifera of the Middle Cambrian Wheeler Shale, from the Wheeler Amphitheater, House Range, in Western Utah". Journal of Paleontology 52 (6): 1325–1345. doi:10.2307/1303938. JSTOR 1303938.  edit
  2. ^ SDZUY, K. (1969). "Unter- and mittelkambrische Porifera. (Chancellorida und Hexactinellida)". Palaontologische. Zeitschrift, 43 ((3–4):): =115–147. 
  3. ^ Reid, R. E. H. (2009). "Occurrence of Chancelloria Walcott in the Comley Limestone". Geological Magazine 96 (03): 261. doi:10.1017/S0016756800060271.  edit
  4. ^ Elliott, D. K.; Martin, D. L. (1987). "Chancelloria, an Enigmatic Fossil from the Bright Angel Shale (Cambrian) of Grand Canyon, Arizona". Journal of the Arizona-Nevada Academy of Science 21 (2): 67–72. doi:10.2307/40024887. JSTOR 40024887.  edit
  5. ^ Walcott, C. D. (1920) "Cambrian geology and paleontology IV:6—Middle Cambrian Spongiae", Smithsonian Miscellaneous Collections volume 67 pages 261–364
  6. ^ Bengtson, S. and Hou, X. (2001). "The integument of Cambrian chancelloriids". Acta Palaeontologica Polonica 46 (1): 1–22. 
  7. ^ Caron, J. -B.; Jackson, D. A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS 21 (5): 451–465. doi:10.2110/palo.2003.P05-070R.  edit