ArticleProceedings of the National Academy of Sciences of the United States of America2005
Reconstructing early sponge relationships by using the Burgess Shale fossil Eiffelia globosa, Walcott.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Independent origins of spicules reconcile paleontological and molecular evidence of sponge evolutionary history.Science advances · 2026Article
- A new sponge from the Marjum Formation of Utah documents the Cambrian origin of the hexactinellid body plan.Royal Society open science · 2024Article
- Deep resilience: An evolutionary perspective on calcification in an age of ocean acidification.Frontiers in physiology · 2023Article
- Three-dimensionally preserved soft tissues and calcareous hexactins in a Silurian sponge: implications for early sponge evolution.Royal Society open science · 2019Article
- Naked chancelloriids from the lower Cambrian of China show evidence for sponge-type growth.Proceedings. Biological sciences · 2018Article
- Discovery of missing link between demosponges and hexactinellids confirms palaeontological model of sponge evolution.Scientific reports · 2017Article
- Carbonaceous preservation of Cambrian hexactinellid sponge spicules.Biology letters · 2010Article
- Biogeochemistry: Early animals out in the cold.Nature · 2009Article
- Seventeen new complete mtDNA sequences reveal extensive mitochondrial genome evolution within the Demospongiae.PloS one · 2008Article
- The earliest fossil record of the animals and its significance.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2008Review
- Wnt and TGF-beta expression in the sponge Amphimedon queenslandica and the origin of metazoan embryonic patterning.PloS one · 2007Article
- Darwin's dilemma: the realities of the Cambrian 'explosion'.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2006Review
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2 authors.
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Abstract
The relationships of the sponge classes are controversial, particularly between the calcareous and siliceous sponges. Specimens of the putative calcarean Eiffelia globosa Walcott from the Burgess Shale show the presence of diagnostic hexactinellid spicules integrated into the skeletal mesh. The arrangement of these spicules in Eiffelia is shown to be precisely equivalent to that of early protospongioid hexactinellids, and sponge growth occurred through an identical pattern to produce identical skeletal body morphology. The difference in spicule composition of the classes is interpreted through the observation of taphonomic features of Eiffelia that suggest the presence of at least two mineralogically distinct layers within the spicules. These results support molecular analyses that identify the calcarean-silicisponge transition as the earliest major sponge branch and suggest that the heteractinids were paraphyletic with respect to the Hexactinellida.
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