ArticleScientific reports2013
A sclerite-bearing stem group entoproct from the early Cambrian and its implications.
Article in Scientific reports, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed.
- Molluscan Shells, Spicules, and Gladii Are Evolutionarily Deeply Conserved.Journal of experimental zoology. Part B, Molecular and developmental evolution · 2025Article
- Brachiopod and mollusc biomineralisation is a conserved process that was lost in the phoronid-bryozoan stem lineage.EvoDevo · 2022Article
- Ediacaran metazoan reveals lophotrochozoan affinity and deepens root of Cambrian Explosion.Science advances · 2021Article
- A new species of the deuterostome Herpetogaster from the early Cambrian Chengjiang biota of South China.Die Naturwissenschaften · 2020Article
- Survival and selection biases in early animal evolution and a source of systematic overestimation in molecular clocks.Interface focus · 2020Article
- Revisiting metazoan phylogeny with genomic sampling of all phyla.Proceedings. Biological sciences · 2019Article
- Orthrozanclus elongata n. sp. and the significance of sclerite-covered taxa for early trochozoan evolution.Scientific reports · 2017Article
- Gene Expression Patterns in Brachiopod Larvae Refute the "Brachiopod-Fold" Hypothesis.Frontiers in cell and developmental biology · 2017Article
- Ecological innovations in the Cambrian and the origins of the crown group phyla.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016Article
- Ediacaran skeletal metazoan interpreted as a lophophorate.Proceedings. Biological sciences · 2015Article
- An early Cambrian agglutinated tubular lophophorate with brachiopod characters.Scientific reports · 2014Article
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13 authors.
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Abstract
The Lophotrochozoa includes disparate tentacle-bearing sessile protostome animals, which apparently appeared in the Cambrian explosion, but lack an uncontested fossil record. Here we describe abundant well preserved material of Cotyledion tylodes Luo et Hu, 1999, from the Cambrian (Series 2) Chengjiang deposits, reinterpreted here as a stem-group entoproct. The entoproct affinity is supported by the sessile body plan and interior soft anatomy. The body consists of an upper calyx and a lower elongate stalk with a distal holdfast. The soft anatomy includes a U-shaped gut with a mouth and aboral anus ringed by retractable marginal tentacles. Cotyledion differs from extant entoprocts in being larger, and having the calyx and the stalk covered by numerous loosely-spaced external sclerites. The description of entoprocts from the Chengjiang biota traces the ancestry of yet another lophotrochozoan phylum back to the Cambrian radiation, and has important implications for the earliest evolution of lophotrochozoans.
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