Eldonia

Eldonia
Temporal range: Cambrian Stage 3–Middle Ordovician
Eldonia ludwigii from the middle Cambrian Burgess Shale.
Life restoration
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Stem group: Ambulacraria
Clade: †Cambroernida
Class: †Eldonioidea
Family: †Eldoniidae
Genus: †Eldonia
Species
  • E. ludwigii Walcott 1911
  • E. eumorpha Sun & Hou 1987
  • E. berbera Alessandrello 2003[1]
Synonyms
  • Yunnanomedusa[2]
  • Stellostomites[2]

Eldonia is an extinct soft-bodied cambroernid animal of unknown affinity,[3] best known from the Fossil Ridge outcrops of the Burgess Shale, particularly in the 'Great Eldonia layer' in the Walcott Quarry.[4] In addition to the 550 collected by Walcott,[5] 224 specimens of Eldonia are known from the Greater Phyllopod bed, where they comprise 0.43% of the community.[6] Species also occur in the Chengjiang biota,[2] Siberia,[7] and in Upper Ordovician strata of Morocco.

A specimen from the Lower Ordovician Madaoyu Formation in Hunan, South China, can be interpreted as the incomplete body of Eldonia or the similar animal. However, its annulation, the structure of the intestine and the shape of the body are more similar to those of Ottoia.[8]

  1. ^ ALESSANDRELLO Anna; A BRACCHI Giacomo (2003). "Eldonia berbera n. sp., a new species of the enigmatic genus Eldonia Walcott, 1911 from the Rawtheyan (Upper Ordovician) of little Atlas (Erfoud, Tafilalt, Morocco)". Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale in Milano. 144 (2). Milano, ITALIE: 337–358. ISSN 0037-8844.
  2. ^ a b c CHEN, J-Y.; M-Y. ZHU; G. Q. ZHOU (1995). "The early Cambrian medusiform metazoan Eldonia from the Chengjiang Lagerstätte" (PDF). Acta Palaeontologica Polonica. 40: 213–244.
  3. ^ Signor, P. W.; Vermeij, G. J. (1 July 1994). "The Plankton and the Benthos: Origins and Early History of an Evolving Relationship". Paleobiology. 20 (3): 259–406. Bibcode:1994Pbio...20..297S. doi:10.1017/s0094837300012793. ISSN 0094-8373. JSTOR 2401005. S2CID 87094600.
  4. ^ Gabbott, S. E.; Zalasiewicz, J.; Collins, D. (2008). "Sedimentation of the Phyllopod Bed within the Cambrian Burgess Shale Formation of British Columbia". Journal of the Geological Society. 165 (1): 307–318. Bibcode:2008JGSoc.165..307G. doi:10.1144/0016-76492007-023. S2CID 128685811.
  5. ^ Durham, J. W. (1974). "Systematic Position of Eldonia ludwigi Walcott". Journal of Paleontology. 48 (4): 750–755. Bibcode:1974JPal...48..524M. JSTOR 1303225.
  6. ^ Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. Bibcode:2006Palai..21..451C. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022. S2CID 53646959.
  7. ^ D. Friend; A. Yu. Zhuravlev & I. A. Solov’ev (2002). "Middle Cambrian Eldonia from the Siberian Platform". Paleontological Journal. 36 (1): 20–24. Archived from the original on 2016-03-03.
  8. ^ Xiang Fang, Yingyan Mao, Qi Liu, Wenwei Yuan, Zhongyang Chen, Rongchang Wu, Lixia Li, Yuchen Zhang, Junye Ma, Wenhui Wang, Renbin Zhan, Shanchi Peng, Yuandong Zhang, Diying Huang (2022). "The Liexi fauna: a new Lagerstätte from the Lower Ordovician of South China". Proceedings of the Royal Society B. 289 (1978): 1—8. doi:10.1098/rspb.2022.1027. PMC 9277276.{{cite journal}}: CS1 maint: multiple names: authors list (link)