ArticleScience advances2015
A vanished history of skeletonization in Cambrian comb jellies.
Article in Science advances, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
8 citing papers in PubMed.
- The first record of a shortnose chimaera-like egg capsule from the Mesozoic (Late Jurassic, Switzerland).Swiss journal of palaeontology · 2025Article
- Ctenophora: Illustrated Guide and Taxonomy.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Brief History of Ctenophora.Methods in molecular biology (Clifton, N.J.) · 2024Review
- A late-surviving stem-ctenophore from the Late Devonian of Miguasha (Canada).Scientific reports · 2021Article
- Cambrian comb jellies from Utah illuminate the early evolution of nervous and sensory systems in ctenophores.iScience · 2021Article
- High-Quality Genome Assembly ofFrontiers in genetics · 2020Article
- The early Cambrian fossil embryoProceedings. Biological sciences · 2017Article
- Three Cambrian fossils assembled into an extinct body plan of cnidarian affinity.Proceedings of the National Academy of Sciences of the United States of America · 2017Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Ctenophores are traditionally regarded as "lower" metazoans, sharing with cnidarians a diploblastic grade of organization. Unlike cnidarians, where skeletonization (biomineralization and sclerotization) evolved repeatedly among ecologically important taxa (for example, scleractinians and octocorals), living ctenophores are characteristically soft-bodied animals. We report six sclerotized and armored ctenophores from the early Cambrian period. They have diagnostic ctenophore features (for example, an octamerous symmetry, oral-aboral axis, aboral sense organ, and octaradially arranged ctene rows). Unlike most modern counterparts, however, they lack tentacles, have a sclerotized framework, and have eight pairs of ctene rows. They are resolved as a monophyletic group (Scleroctenophora new class) within the ctenophores. This clade reveals a cryptic history and sheds new light on the early evolution of this basal animal phylum. Skeletonization also occurs in some other Cambrian animal groups whose extant members are exclusively soft-bodied, suggesting the ecological importance of skeletonization in the Cambrian explosion.
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Registered trials
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