The significance of sponges for comparative studies of developmental evolution.
choanocyte
developmental plasticity
evolution
myocyte
sponge
Journal
Wiley interdisciplinary reviews. Developmental biology
ISSN: 1759-7692
Titre abrégé: Wiley Interdiscip Rev Dev Biol
Pays: United States
ID NLM: 101576624
Informations de publication
Date de publication:
03 2020
03 2020
Historique:
received:
15
03
2019
revised:
27
05
2019
accepted:
27
06
2019
pubmed:
29
7
2019
medline:
8
6
2021
entrez:
29
7
2019
Statut:
ppublish
Résumé
Sponges, ctenophores, placozoans, and cnidarians have key evolutionary significance in that they bracket the time interval during which organized animal tissues were first assembled, fundamental cell types originated (e.g., neurons and myocytes), and developmental patterning mechanisms evolved. Sponges in particular have often been viewed as living surrogates for early animal ancestors, largely due to similarities between their feeding cells (choanocytes) with choanoflagellates, the unicellular/colony-forming sister group to animals. Here, we evaluate these claims and highlight aspects of sponge biology with comparative value for understanding developmental evolution, irrespective of the purported antiquity of their body plan. Specifically, we argue that sponges strike a different balance between patterning and plasticity than other animals, and that environmental inputs may have prominence over genetically regulated developmental mechanisms. We then present a case study to illustrate how contractile epithelia in sponges can help unravel the complex ancestry of an ancient animal cell type, myocytes, which sponges lack. Sponges represent hundreds of millions of years of largely unexamined evolutionary experimentation within animals. Their phylogenetic placement lends them key significance for learning about the past, and their divergent biology challenges current views about the scope of animal cell and developmental biology. This article is characterized under: Comparative Development and Evolution > Evolutionary Novelties Comparative Development and Evolution > Body Plan Evolution.
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
e359Informations de copyright
© 2019 Wiley Periodicals, Inc.
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