ArticleEvoDevo2013
What is a segment?
Article in EvoDevo, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 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.
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.
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Who cites it
15 citing papers in PubMed.
- Earliest evidence of behavioural handedness in the Ediacaran motile bilaterian Spriggina floundersi.Scientific reports · 2026Article
- Reduction of body segmentation in the skeleton shrimp Caprella scaura (Amphipoda: Caprellidae) inferred from comparative internal anatomy of Caprelloidea.Die Naturwissenschaften · 2026Article
- On the prospects of basal cognition research becoming fully evolutionary: promising avenues and cautionary notes.History and philosophy of the life sciences · 2025Article
- Ediacara growing pains: Modular addition and development inPaleobiology · 2022Article
- The organizing role of Wnt signaling pathway during arthropod posterior growth.Frontiers in cell and developmental biology · 2022Review
- Revisiting kinorhynch segmentation: variation of segmental patterns in the nervous system of three aberrant species.Frontiers in zoology · 2021Article
- Developmental processes in Ediacara macrofossils.Proceedings. Biological sciences · 2021Article
- Assessing segmental versus non-segmental features in the ventral nervous system of onychophorans (velvet worms).BMC evolutionary biology · 2017Article
- Highly regulated growth and development of the Ediacara macrofossil Dickinsonia costata.PloS one · 2017Article
- Revisiting the segmental organization of the human spinal cord.Journal of anatomy · 2016Article
- Odd-paired controls frequency doubling ineLife · 2016Article
- The neuromuscular system ofEvoDevo · 2016Article
- Armored kinorhynch-like scalidophoran animals from the early Cambrian.Scientific reports · 2015Article
- What can vertebrates tell us about segmentation?EvoDevo · 2014Review
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Animals have been described as segmented for more than 2,000 years, yet a precise definition of segmentation remains elusive. Here we give the history of the definition of segmentation, followed by a discussion on current controversies in defining a segment. While there is a general consensus that segmentation involves the repetition of units along the anterior-posterior (a-p) axis, long-running debates exist over whether a segment can be composed of only one tissue layer, whether the most anterior region of the arthropod head is considered segmented, and whether and how the vertebrate head is segmented. Additionally, we discuss whether a segment can be composed of a single cell in a column of cells, or a single row of cells within a grid of cells. We suggest that 'segmentation' be used in its more general sense, the repetition of units with a-p polarity along the a-p axis, to prevent artificial classification of animals. We further suggest that this general definition be combined with an exact description of what is being studied, as well as a clearly stated hypothesis concerning the specific nature of the potential homology of structures. These suggestions should facilitate dialogue among scientists who study vastly differing segmental structures.
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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.