The history of receptaculitid studies is the narrative of the evolution of the concept of receptaculitids. It is not a collection of dead or wrong ideas or models, but an explanation of bases upon which the receptaculitid nature has been built. Agreement or disagreement on the taxonomic assignment of receptaculitids may be understood when the debate on their nature is examined in historical perspective. Ideas change and evolve; they are very complex products of the human mind and social influences; they respond to the shifting winds of interests and are never final.
KeywordsCarboniferous Shale Natural Size Round Hole Siliceous Sponge Jurassic Limestone
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