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dc.contributor.author Dong, Xi-ping
dc.contributor.author Donoghue, Philip C. J.
dc.contributor.author Cunningham, John A.
dc.contributor.author Liu, Jian-bo
dc.contributor.author Cheng, Hong
dc.date.accessioned 2012-10-30T15:58:11Z
dc.date.available 2012-10-30T15:58:11Z
dc.date.issued 2005-08-30
dc.identifier doi:10.5061/dryad.40f6d
dc.identifier.citation Dong X, Donoghue PCJ, Cunningham JA, Liu J, Cheng H (2005) The anatomy, affinity, and phylogenetic significance of Markuelia. Evolution & Development 7(5): 468-482.
dc.identifier.uri http://hdl.handle.net/10255/dryad.43763
dc.description The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric.
dc.relation.ispartofseries 7;;2005
dc.relation.haspart doi:10.5061/dryad.40f6d/1
dc.relation.isreferencedby doi:10.1111/j.1525-142X.2005.05050.x
dc.relation.isreferencedby PMID:16174039
dc.title Data from: The anatomy, affinity, and phylogenetic significance of Markuelia
dc.type Article *
dwc.ScientificName Markuelia
dwc.ScientificName Priapulida
dwc.ScientificName Palaeoscolecida
dwc.ScientificName Vinctiplicata
dwc.ScientificName Introverta
dwc.ScientificName Scalidophora
dwc.ScientificName Ecdysozoa
dc.contributor.correspondingAuthor Dong, Xi-ping
prism.publicationName Evolution & Development

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