The first fossil entoproct

  title={The first fossil entoproct},
  author={Jonathan A. Todd and Paul D. Taylor},
It has long been appreciated that the fossil record is strongly biased towards groups with mineralized skeletons. If most or all animal phyla originated in the Precambrian [1], then many softbodied phyla must have long histories unrepresented in the fossil record. Among these are the Entoprocta, a small phylum of aquatic metazoans. The only supposed fossil entoproct is the Cambrian genus Dinomischus [2-4] . However, body size in Dinomischus is at least an order of magnitude greater than that of… 
Tentaculate Fossils from the Cambrian of Canada (British Columbia) and China (Yunnan) Interpreted as Primitive Deuterostomes
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A compilation of the patterns of fossil and molecular diversification, comparative developmental data, and information on ecological feeding strategies indicate that the major animal clades diverged many tens of millions of years before their first appearance in the fossil record.
The stalked filter feeder Siphusauctum lloydguntheri n. sp. from the middle Cambrian (Series 3, Stage 5) Spence Shale of Utah: its biological affinities and taphonomy
A new species of enigmatic stalked filter feeder, Siphusauctum lloydguntheri, from the middle Cambrian (Series 3, Stage 5) Antimony Canyon locality of the Spence Shale of northern Utah is described.
The stalked fi lter feeder Siphusauctum lloydguntheri n . sp . from the middle Cambrian ( Series 3 , Stage 5 ) Spence Shale of Utah : its biological af fi nities and taphonomy
—We describe a new species of enigmatic stalked filter feeder, Siphusauctum lloydguntheri, from the middle Cambrian (Series 3, Stage 5) Antimony Canyon locality of the Spence Shale of northern Utah.
Causes and consequences of the Cambrian explosion
The Cambrian explosion has long been a basic research frontier that concerns many scientific fields. Here we discuss the cause-effect links of the Cambrian explosion on the basis of first appearances


The adult and larval morphology and life history of the entoproct Barentsia gracilis (M. Sars, 1835)
The feeding behavior of the adult is described and the larval feeding and rejection mechanism is reported for the first time and the first detailed morphology of an entoproct larva is presented and the striking similarity to the adult noted.
Loxokalypus socialis gen. et sp. nov. (Kamptozoa, Loxokalypodidae fam. nov.), ein neuer Kamptozoentyp aus dem nördlichen Pazifischen Ozean. Ein Vorschlag zur Neufassung der Kamptozoensystematik
It is proposed that illustrations for new descriptions of entoprocts should be standardized, and that the use of microphotos for this purpose be made obligatory, and a new approach proposed to the taxonomy of Kamptozoa consistent with phylogeny.
The Early Evolution of Metazoa and the Significance of Problematic Taxa
The Origin of metazoans: a phylogeny deducted from sequences of the 28S ribosomal RNA and problems of arthropod phylogeny with some notes on taxa of doubtful affinities, and a new approach to analyzing problematica.
Ein Kreislauforgan bei Kamptozoen
  • P. Emschermann
  • Biology
    Zeitschrift für Zellforschung und Mikroskopische Anatomie
  • 2004
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SUMMARY The uppermost Ampthill Clay and lowermost Kimmeridge Clay are well exposed in a pit at South Ferriby. This provides an exceptional record of depositional conditions across the
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Studies on the regeneration of an entoproct, Barentsia discreta
The double calyx seems to result from calyx regeneration effected without loss of the original calyx, and in every regenerate, the original oral-anal axis is retained.
Studies on marine bryozoa; Barentsia laxa Kirkpatrick 1890.
A much more complete description, numerous measurements and more detailed illustrations of Barentsia laxa than have been previously available have been presented to aid those who wish to make a further study of B. laxa embryology.
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Heterocyclic compounds
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