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 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]

References

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