Chancelloria

Chancelloria is a genus of early animals known from the Middle Cambrian Burgess Shale, the Comley limestone,[4] the Wheeler Shale,[2] the Bright Angel Shale[5] and elsewhere. It is named after Chancellor Peak. It was first described in 1920 by Charles Doolittle Walcott, who regarded them as one of the most primitive groups of sponges.[6] This appears unlikely, and it is currently placed in the enigmatic group Coeloscleritophora.[7] 178 specimens of Chancelloria are known from the Greater Phyllopod bed, where they comprise 0.34% of the community.[8]

Chancelloria
Temporal range: Early Cambrian–lower Upper Cambrian
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. drusilla Walcott, 1920
  • C. libo Walcott, 1920
  • C. yorkensis Walcott, 1920
  • C. cruceana Rusconi, 1954
  • C. lenaica Zhuravleva and Korde, 1955
  • C. altaica Romanenko, 1968
  • C. maroccana Sdzuy, 1969[1]
  • C. iranica Mostler and Mosleh-Yazdi, 1976
  • C. pentacta Rigby, 1978[2]
  • C. arida Duan, 1984
  • C. odontodes Duan, 1984
  • C. sardinica Mostler, 1985
  • C. coronacea Vassiljeva, 1985
  • C. spinulosa Vassiljeva, 1985
  • C. symmetrica Vassiljeva, 1985
  • C. primaria Missarzhevsky, 1989
  • C. racemifundis Bengtson, 1990
  • C. obliqua Gravestock et al., 2001
  • C. australilonga Yun et al., 2019[3]
  • C. impar Moore, 2019
  • C. lilioides Moore, 2019

References
  1. Sdzuy, K. (1969). "Unter- and mittelkambrische Porifera. (Chancellorida und Hexactinellida)". Paläontologische Zeitschrift. 43 (3–4): 115–147. doi:10.1007/bf02987647.
  2. 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. JSTOR 1303938.
  3. Hao Yun; Glenn A. Brock; Xingliang Zhang; Luoyang Li; Diego C. García-Bellido; John R. Paterson (2019). "A new chancelloriid from the Emu Bay Shale (Cambrian Stage 4) of South Australia". Journal of Systematic Palaeontology. Online edition (13): 857–867. doi:10.1080/14772019.2018.1496952.
  4. Reid, R. E. H. (2009). "Occurrence of Chancelloria Walcott in the Comley Limestone". Geological Magazine. 96 (3): 261–262. doi:10.1017/S0016756800060271.
  5. 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.
  6. Walcott, C. D. (1920). "Cambrian geology and paleontology IV:6—Middle Cambrian Spongiae". Smithsonian Miscellaneous Collections. 67: 261–364.
  7. Bengtson, S.; Hou, X. (2001). "The integument of Cambrian chancelloriids" (PDF). Acta Palaeontologica Polonica. 46 (1): 1–22.
  8. 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.


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