Cotyledion
| Cotyledion Temporal range: | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Stem group: | Entoprocta |
| Genus: | †Cotyledion Luo et Hu, 1999 |
| Species: | †C. tylodes |
| Binomial name | |
| †Cotyledion tylodes Luo et Hu, 1999 | |
Cotyledion tylodes is an extinct, stalked filter-feeder known from the Chengjiang lagerstatten. The living animal reached a couple of centimetres in height, and bore a loose scleritome of ovoid sclerites. Its interpretation has been controversial, and it has been previously identified as a carpoid echinoderm, or as a stem group echinoderm. C. tylodes is now classified as a stem group entoprocta based on new fossils that clearly show a U-shaped gut and a crown of tentacles.
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