2016
DOI: 10.1016/j.gde.2016.05.026
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Sponges as models to study emergence of complex animals

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Cited by 31 publications
(22 citation statements)
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“…Several studies on unicellular relatives of animals including choanoflagellates, filastereans, and ichthyosporeans have significantly contributed to understanding how unicellular organisms transform into multicellular structures such as colonial choanoflagellate [33][34][35]. This suggests similar transitions may have taken place in the animal ancestors, which eventually evolved into a stable and functional multicellular animal [36,37]. The current hypothesis on the origin of multicellular animals generally agrees that choanoflagellates share a common ancestor with animals ( Fig.9).…”
Section: Lessons To Learn On the Origin Of Multicellularity Over The mentioning
confidence: 74%
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“…Several studies on unicellular relatives of animals including choanoflagellates, filastereans, and ichthyosporeans have significantly contributed to understanding how unicellular organisms transform into multicellular structures such as colonial choanoflagellate [33][34][35]. This suggests similar transitions may have taken place in the animal ancestors, which eventually evolved into a stable and functional multicellular animal [36,37]. The current hypothesis on the origin of multicellular animals generally agrees that choanoflagellates share a common ancestor with animals ( Fig.9).…”
Section: Lessons To Learn On the Origin Of Multicellularity Over The mentioning
confidence: 74%
“…This idea is based on the molecular phylogeny and morphological similarity between choanoflagellates and sponge choanocytes ( Fig.9 A-C) [38]. Further, the choanoflagellate colonies partially resemble the choanocyte chambers of the sponge [37,39,40]. In addition to their unicellular sister lineages, we also need to investigate other close relatives of the first multicellular animals.…”
Section: Lessons To Learn On the Origin Of Multicellularity Over The mentioning
confidence: 99%
“…The findings suggest that, in addition to nutrient acquisition, choanocytes have immune functionality. This is particularly interesting considering that the structural similarities between choanocytes and choanoflagellates, the unicellular eukaryotes that are sister group to all animals, are often discussed as a sign of homology (Maldonado 2004;Funayama 2013;Adamska 2016). This raises the interesting possibility that the ancestral continuity between innate immune defence and digestion has been preserved in sponge choanocytes.…”
Section: What Can the Sponge Tell Us About The Origin Of Immunity Andmentioning
confidence: 99%
“…It is not clear how an expanded developmental genetic repertoire in the ancestors of modern sponges might have been expressed phenotypically [38], and we should not necessarily expect Cambrian sponges to look more 'animal-like' than modern representatives. Even so, chancelloriids have the potential to shed light on the disparity, development and tissue complexity of early sponges, and to test hypotheses from evolutionary developmental biology of body plan homologies among metazoans [39]. A sponge affinity for chancelloriids deserves renewed consideration.…”
Section: (A) Chancelloriids As Spongesmentioning
confidence: 99%