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- Title
Eoandromeda and the origin of Ctenophora.
- Authors
Tang, Feng; Bengtson, Stefan; Wang, Yue; Wang, Xun-lian; Yin, Chong-yu
- Abstract
SUMMARY The Ediacaran fossil Eoandromeda octobrachiata had a high conical body with eight arms in helicospiral arrangement along the flanks. The arms carried transverse bands proposed to be homologous to ctenophore ctenes (comb plates). Eoandromeda is interpreted as an early stem-group ctenophore, characterized by the synapomorphies ctenes, comb rows, and octoradial symmetry but lacking crown-group synapomorphies such as tentacles, statoliths, polar fields, and biradial symmetry. It probably had a pelagic mode of life. The early appearance in the fossil record of octoradial ctenophores is most consistent with the Planulozoa hypothesis ( Ctenophora is the sister group of Cnidaria + Bilateria) of metazoan phylogeny.
- Subjects
CTENOPHORA; PHYLOGENY; TAPHONOMY; HOMOLOGY (Biology); ANIMAL morphology
- Publication
Evolution & Development, 2011, Vol 13, Issue 5, p408
- ISSN
1520-541X
- Publication type
Article
- DOI
10.1111/j.1525-142X.2011.00499.x