ArticleBiology letters2011
An Early Cambrian stem polychaete with pygidial cirri.
Article in Biology letters, 2011. 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.
- Polychaete annelids from the earliest Cambrian Period.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- A burrowing annelid from the early Cambrian.Biology letters · 2024Article
- New fossil ofRoyal Society open science · 2024Article
- First record of growth patterns in a Cambrian annelid.Royal Society open science · 2023Article
- The rise and early evolution of animals: where do we stand from a trace-fossil perspective?Interface focus · 2020Review
- Article
- Discovery of bilaterian-type through-guts in cloudinomorphs from the terminal Ediacaran Period.Nature communications · 2020Article
- Article
- Sclerite-bearing annelids from the lower Cambrian of South China.Scientific reports · 2019Article
- Brain and eyes of Kerygmachela reveal protocerebral ancestry of the panarthropod head.Nature communications · 2018Article
- Phylogenomic analyses of Crassiclitellata support major Northern and Southern Hemisphere clades and a Pangaean origin for earthworms.BMC evolutionary biology · 2017Article
- Earth's oldest 'Bobbit worm' - gigantism in a Devonian eunicidan polychaete.Scientific reports · 2017Article
- The impact of fossil data on annelid phylogeny inferred from discrete morphological characters.Proceedings. Biological sciences · 2016Article
- 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
- A new fireworm (Amphinomidae) from the Cretaceous of Lebanon identified from three-dimensionally preserved myoanatomy.BMC evolutionary biology · 2015Article
- Cambrian stem-group annelids and a metameric origin of the annelid head.Biology letters · 2015Article
- Lower Cambrian polychaete from China sheds light on early annelid evolution.Die Naturwissenschaften · 2015Article
- Mineralization of Alvinella polychaete tubes at hydrothermal vents.Geobiology · 2015Article
- A model for germ cell development in a fully segmented worm.Zoological letters · 2015Article
- Arthroaspis n. gen., a common element of the Sirius Passet Lagerstätte (Cambrian, North Greenland), sheds light on trilobite ancestry.BMC evolutionary biology · 2013Article
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3 authors.
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Abstract
The oldest annelid fossils are polychaetes from the Cambrian Period. They are representatives of the annelid stem group and thus vital in any discussion of how we polarize the evolution of the crown group. Here, we describe a fossil polychaete from the Early Cambrian Sirius Passet fauna, Pygocirrus butyricampum gen. et sp. nov., with structures identified as pygidial cirri, which are recorded for the first time from Cambrian annelids. The body is slender and has biramous parapodia with chaetae organized in laterally oriented bundles. The presence of pygidial cirri is one of the characters that hitherto has defined the annelid crown group, which diversified during the Cambrian-Ordovician transition. The newly described fossil shows that this character had already developed within the total group by the Early Cambrian.
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