Chancelloria

{{Short description|Extinct genus of Cambrian animals}}

{{Automatic taxobox

| taxon = Chancelloria

| image = Fossil sponge Chancelloria pentacta.png

| image_upright = 1.2

| image_alt =

| image_caption = Fossil Chancelloria pentacta displayed at the Paleontological Research Institution, NY

| fossil_range = {{Fossil range|Cambrian Stage 3|Middle Cambrian|Early Cambrian–lower Upper Cambrian}}

| authority = Walcott, 1920

| subdivision = {{species list

| 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{{cite journal |author=Sdzuy, K. |year=1969 |journal=Paläontologische Zeitschrift|title= Unter- and mittelkambrische Porifera. (Chancellorida und Hexactinellida) |volume=43 |issue=3–4 |pages=115–147 |doi=10.1007/bf02987647|s2cid=128945059 }}

| C. iranica | Mostler and Mosleh-Yazdi, 1976

| C. pentacta | Rigby, 1978{{Cite journal| last1 = Rigby | first1 = J. Keith| title = Porifera of the Middle Cambrian Wheeler Shale, from the Wheeler Amphitheater, House Range, in Western Utah| jstor = 1303938| journal = Journal of Paleontology| volume = 52| issue = 6| pages = 1325–1345| year = 1978}}

| 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{{Cite journal|author1=Hao Yun |author2=Glenn A. Brock |author3=Xingliang Zhang |author4=Luoyang Li |author5=Diego C. García-Bellido |author6=John R. Paterson |year=2019 |title=A new chancelloriid from the Emu Bay Shale (Cambrian Stage 4) of South Australia |journal=Journal of Systematic Palaeontology |volume=17 |issue= 13|pages= 857–867|doi=10.1080/14772019.2018.1496952 |s2cid=92098182 }}

| C. impar | Moore, 2019

| C. lilioides | Moore, 2019

| C. zhaoi | Peng et al., 2023

}}

}}

Chancelloria is a genus of early animals known from the Middle Cambrian Burgess Shale, the Comley limestone,{{Cite journal| last1 = Reid | first1 = R. E. H.| title = Occurrence of Chancelloria Walcott in the Comley Limestone| journal = Geological Magazine| volume = 96| issue = 3| pages = 261–262| year = 2009| doi = 10.1017/S0016756800060271| doi-access = free}} the Wheeler Shale, the Bright Angel Shale{{cite journal | author = Elliott|first1=D. K. | first2=D. L. |last2=Martin | title = Chancelloria, an enigmatic fossil from the Bright Angel Shale (Cambrian) of Grand Canyon, Arizona | jstor = 40024887 | journal = Journal of the Arizona-Nevada Academy of Science | volume = 21 |year=1987 | issue = 2|pages=67–72}} and elsewhere (such as Iran). 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.{{cite journal | last1 = Walcott | first1 = C. D. | year = 1920 | title = Cambrian geology and paleontology IV:6—Middle Cambrian Spongiae | url = https://biodiversitylibrary.org/page/29838882 | journal = Smithsonian Miscellaneous Collections | volume = 67 | pages = 261–364 }} However, they are currently thought to be member of the group Chancelloriidae. 178 specimens of Chancelloria are known from the Greater Phyllopod bed, where they comprise 0.34% of the community.{{cite journal|last1=Caron |first1=Jean-Bernard|last2=Jackson |first2=Donald A.|title=Taphonomy of the Greater Phyllopod Bed community, Burgess Shale|journal=PALAIOS |volume=21 |issue=5 |pages=451–65|date=October 2006|doi=10.2110/palo.2003.P05-070R|jstor=20173022|bibcode=2006Palai..21..451C |s2cid=53646959 }}