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Three-dimensional fragments of palaeoscolecid cuticle have been recovered from the Furongian (upper Cambrian) of Hunan, South China. Extraordinary preservation of the fossils shows exquisite surface details indicating a three-layered structure of the cuticle. One new genus and two new species Dispinoscolex decorus gen. et sp. nov. and Schistoscolex hunanensis sp. nov. are described. The co-occurrence of these palaeoscolecid remains with those of Markuelia hunanensis allowed us to test the hypothesis that Markuelia, known hitherto only from embryonic remains, is an embryonic palaeoscolecid. The comparative anatomy of Markuelia and the co-occurring palaeoscolecids shows a number of distinctions, particularly in the structure of the tail; all similarities are scalidophoran or introvertan (cycloneuralian) symplesiomorphies. The available evidence does not support the interpretation of Markuelia as an embryonic palaeoscolecid.
|Number of pages||10|
|Publication status||Published - May 2012|
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- 2 Finished
DECODING THE FOSSIL RECORD OF EMBRYOLOGY AT THE DAWN OF ANIMAL EVOLUTION
16/06/08 → 16/06/12
DEVELOPMENT AND EVOLUTION OF EARLY METAZOANS, UNCOVERING AND INTERPRETATING THE FOSSIL RECORD OF EMBRYONIC DEVELOPMENT
10/01/05 → 10/01/08