ArticleProceedings. Biological sciences2019
Origin of ecdysis: fossil evidence from 535-million-year-old scalidophoran worms.
Article in Proceedings. Biological sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
13 citing papers in PubMed.
- Polychaete annelids from the earliest Cambrian Period.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Three-dimensional reconstruction of ediacaran ceramiales (Rhodophyta) from the phosphorite doushantuo formation, South China.Scientific reports · 2026Article
- New observation onRoyal Society open science · 2025Article
- Exotic cuticular specializations in a Cambrian scalidophoran.Proceedings. Biological sciences · 2025Article
- The first leech body fossil predates estimated hirudinidan origins by 200 million years.PeerJ · 2025Article
- The early CambrianProceedings. Biological sciences · 2024Article
- Ediacaran origin and Ediacaran-Cambrian diversification of Metazoa.Science advances · 2024Article
- Early evolution of the ecdysozoan body plan.eLife · 2024Article
- Molting in early Cambrian armored lobopodians.Communications biology · 2024Article
- Neuromodulation and the toolkit for behavioural evolution: can ecdysis shed light on an old problem?The FEBS journal · 2024Review
- Article
- Article
- Cuticular reticulation replicates the pattern of epidermal cells in lowermost Cambrian scalidophoran worms.Proceedings. Biological sciences · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
With millions of extant species, ecdysozoans (Scalidophora, Nematoida and Panarthropoda) constitute a major portion of present-day biodiversity. All ecdysozoans secrete an exoskeletal cuticle which must be moulted periodically and replaced by a larger one. Although moulting (ecdysis) has been recognized in early Palaeozoic panarthropods such as trilobites and basal groups such as anomalocaridids and lobopodians, the fossil record lacks clear evidence of ecdysis in early scalidophorans, largely because of difficulties in recognizing true exuviae. Here, we describe two types of exuviae in microscopic scalidophoran worms from the lowermost Cambrian Kuanchuanpu Formation ( ca 535 Ma) of China and reconstruct their moulting process. These basal scalidophorans moulted in a manner similar to that of extant priapulid worms, extricating themselves smoothly from their old tubular cuticle or turning their exuviae inside out like the finger of a glove. This is the oldest record of moulting in ecdysozoans. We also discuss the origin of ecdysis in the light of recent molecular analyses and the significance of moulting in the early evolution of animals.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.