AI Article Synopsis
- Spiralia is a diverse group of ancient animals with distinct early developmental processes and varied adult forms, often characterized by the use of ciliary bands for movement and feeding.
- A study examined 20 conserved genes within Spiralia, discovering that two genes are specifically expressed in the ciliary band of the mollusc Tritia.
- One of these genes, lophotrochin, has a consistent role in ciliated structures across different spiralian species, emphasizing the significance of unique lineage-specific genes for grasping shared traits among ancient animal lineages.
Article Abstract
Spiralia is a large, ancient and diverse clade of animals, with a conserved early developmental program but diverse larval and adult morphologies. One trait shared by many spiralians is the presence of ciliary bands used for locomotion and feeding. To learn more about spiralian-specific traits we have examined the expression of 20 genes with protein motifs that are strongly conserved within the Spiralia, but not detectable outside of it. Here, we show that two of these are specifically expressed in the main ciliary band of the mollusc Tritia (also known as Ilyanassa). Their expression patterns in representative species from five more spiralian phyla-the annelids, nemerteans, phoronids, brachiopods and rotifers-show that at least one of these, lophotrochin, has a conserved and specific role in particular ciliated structures, most consistently in ciliary bands. These results highlight the potential importance of lineage-specific genes or protein motifs for understanding traits shared across ancient lineages.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7441323 | PMC |
| http://dx.doi.org/10.1038/s41467-020-17780-7 | DOI Listing |
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