Chancelloria

Chancelloria Temporal range: Early Cambrian–lower Upper Cambrian PreЄ Є O S D C P T J K Pg N
Detail of a fossil of Chancelloria eros, on display at the Naturhistorisches Museum, Vienna.
Scientific classification
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 animals 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

• "Chancelloria eros". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011.

References

1. 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 (inactive 2015-10-02). JSTOR 1303938.
2. Sdzuy, K. (1969). "Unter- and mittelkambrische Porifera. (Chancellorida und Hexactinellida)". Palaontologische Zeitschrift 43 (3–4): 115–147. doi:10.1007/bf02987647.
3. Reid, R. E. H. (2009). "Occurrence of Chancelloria Walcott in the Comley Limestone". Geological Magazine 96 (3): 261. doi:10.1017/S0016756800060271.
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. JSTOR 40024887.
5. Walcott, C. D. (1920). "Cambrian geology and paleontology IV:6—Middle Cambrian Spongiae". Smithsonian Miscellaneous Collections 67: 261–364.
6. Bengtson, S. and Hou, X. (2001). "The integument of Cambrian chancelloriids". Acta Palaeontologica Polonica 46 (1): 1–22.
7. Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS 21 (5): 451–65. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022.