Cited by 24Marine Invertebrate Physiology and EcologyDevelopmental Biology and Gene RegulationProtist diversity and phylogeny

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Genomic, phylogenetic, and cell biological insights into metazoan origins

Nichols, Scott A., Dayel, Mark J., King, Nicole·2009·Animal Evolution

DOI 10.1093/acprof:oso/9780199549429.003.0003

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Abstract

Over 600 million years ago, the first multicellular metazoans evolved from their single celled ancestors. Although not recorded in the fossil record, the earliest events in metazoan evolution can be inferred by integrating findings from phylogenetics, genomics, and cell biology. Comparisons of choanoflagellate — microeukaryote relatives of metazoans, with sponges (the earliest known metazoans) — reveal genetic innovations associated with metazoan origins. Among these are the evolution of gene families required for cell adhesion and cell signaling, the presence of which catalyzed the evolution of multicellularity and whose functions have since been elaborated to regulate cell differentiation, developmental patterning, morphogenesis, and the functional integration of tissues. The most ancient tissues — differentiated epithelia — are found in sponges and evolved before the origin and diversification of modern phyla.

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Authors: Nichols, S. A., Dayel, M. J., & King, N.
ORCID: Nichols, Scott A.
Dayel, Mark J.
King, Nicole
Venue: Animal Evolution
Publisher: Oxford University PressOxford
Published: 2009-08-01
Pages: 24-32
DOI: 10.1093/acprof:oso/9780199549429.003.0003
OpenAlex: W2502404727
Cited by: 24
References: 1,066
Citations by year: 2025: 1 · 2024: 1 · 2022: 1 · 2020: 1 · 2019: 3 · 2018: 1 · 2016: 3 · 2015: 3 · 2014: 3 · 2013: 4 · 2012: 1
FWCI: 13.67
Type: book chapter
Language: en
Open access: closed
Topics: Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Marine Invertebrate Physiology and Ecology
Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Protist diversity and phylogeny
Keywords: metazoan origin, evolution of multicellularity, choanoflagellates, sponges, cell adhesion genes, gene family evolution, metazoan phylogeny, cell differentiation, morphogenesis

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Genomic, phylogenetic, and cell biological insights into metazoan origins

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