ArticleProceedings. Biological sciences2016
Pigmented anatomy in Carboniferous cyclostomes and the evolution of the vertebrate eye.
Article in Proceedings. Biological sciences, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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20 citing papers in PubMed.
- Patterns of Proliferation in the Pacific Hagfish (Eptatretus stoutii) Retina Suggest an Ancient Origin for Adult Neurogenesis.The Journal of comparative neurology · 2026Article
- Article
- From melanogenesis to melanin technologies.Communications chemistry · 2025Review
- Ediacaran origin and Ediacaran-Cambrian diversification of Metazoa.Science advances · 2024Article
- Hagfish genome elucidates vertebrate whole-genome duplication events and their evolutionary consequences.Nature ecology & evolution · 2024Article
- Taphonomic experiments reveal authentic molecular signals for fossil melanins and verify preservation of phaeomelanin in fossils.Nature communications · 2023Article
- Prominent Roles and Conflicted Attitudes of Eumelanin in the Living World.International journal of molecular sciences · 2023Review
- Hagfish to Illuminate the Developmental and Evolutionary Origins of the Vertebrate Retina.Frontiers in cell and developmental biology · 2022Review
- Non-ammocoete larvae of Palaeozoic stem lampreys.Nature · 2021Article
- Vertebrate features revealed in the rudimentary eye of the Pacific hagfish (Proceedings. Biological sciences · 2021Article
- Consciousness in Jawless Fishes.Frontiers in systems neuroscience · 2021Article
- Evolution and development of complex eyes: a celebration of diversity.Development (Cambridge, England) · 2020Review
- An enigmatic translocation of the vertebrate primordial eye field.BMC evolutionary biology · 2020Review
- Recent advances in amniote palaeocolour reconstruction and a framework for future research.Biological reviews of the Cambridge Philosophical Society · 2020Article
- Chemical characterization of pterosaur melanin challenges color inferences in extinct animals.Scientific reports · 2019Article
- Tissue-specific geometry and chemistry of modern and fossilized melanosomes reveal internal anatomy of extinct vertebrates.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Hagfish from the Cretaceous Tethys Sea and a reconciliation of the morphological-molecular conflict in early vertebrate phylogeny.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- An axon initial segment is required for temporal precision in action potential encoding by neuronal populations.Science advances · 2018Article
- Biological tissue sample preparation for time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging.Nano convergence · 2018Review
- Article
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6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The success of vertebrates is linked to the evolution of a camera-style eye and sophisticated visual system. In the absence of useful data from fossils, scenarios for evolutionary assembly of the vertebrate eye have been based necessarily on evidence from development, molecular genetics and comparative anatomy in living vertebrates. Unfortunately, steps in the transition from a light-sensitive 'eye spot' in invertebrate chordates to an image-forming camera-style eye in jawed vertebrates are constrained only by hagfish and lampreys (cyclostomes), which are interpreted to reflect either an intermediate or degenerate condition. Here, we report-based on evidence of size, shape, preservation mode and localized occurrence-the presence of melanosomes (pigment-bearing organelles) in fossil cyclostome eyes. Time of flight secondary ion mass spectrometry analyses reveal secondary ions with a relative intensity characteristic of melanin as revealed through principal components analyses. Our data support the hypotheses that extant hagfish eyes are degenerate, not rudimentary, that cyclostomes are monophyletic, and that the ancestral vertebrate had a functional visual system. We also demonstrate integument pigmentation in fossil lampreys, opening up the exciting possibility of investigating colour patterning in Palaeozoic vertebrates. The examples we report add to the record of melanosome preservation in Carboniferous fossils and attest to surprising durability of melanosomes and biomolecular melanin.
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