Titlebook: Receptaculitids; A Phylogenetic Debat Matthew H. Nitecki,Harry Mutvei,Doris V. Nitecki Book 1999 Springer Science+Business Media New York 1

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https://doi.org/10.1007/978-1-4615-4691-7geology; history; history of life; morphology; stratigraphy

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f phosphatized receptaculitids on the Baltic Sea island of?land, the authors conclude that receptaculitids possess anattribute not found in any other group of organisms, living or fossil.978-1-4613-7124-3978-1-4615-4691-7

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Introduction,wn. We will briefly review the history of interpretations of the nature of receptaculitids, and by combining historical analysis with morphological analysis, attempt to lay the foundation for the future reconstruction of the phylogeny and systematic position of receptaculitids.

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Introduction,rs of fossil taxa. We will describe and analyze the characters of . from the Swedish Island of ?land (originally described as . by Eichwald 1840a) within the larger framework of Problematica, that is, fossil taxa that cannot be assigned into any classificatory scheme because their phylogeny is unkno

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The Biography of an Idea,as 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 comp

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Geology,ogeny. Aleksandr Grigorevich Vologdin and A. B. Maslov (1960) described a new Lower Yudom’ian (Terminal Riphean) family, Suvorovellidae, of uncertain taxonomic position, and erected two new genera, ., which they speculated may have given rise to receptaculitids. By placing receptaculitids with archa