et The first articulated specimen of Plumulites canadensis (Woodward, 1889) from the Upper Ordovician of Ontario, with a review of the anterior region of Plumulitidae (Annelida: Machaeridia)

Jakob Vinther*, David Rudkin

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

10 Citations (Scopus)

Abstract

Articulated plumulitid machaeridians are rarely preserved intact. Here, we describe a complete specimen of Plumulites canadensis (Woodward, 1889) retaining much of the head region. The two anteriormost pairs of shell plates are quite distinct from the rest in outline, density of concentric rugae, and especially the radial ornamentation of the second pair. We demonstrate that the latter condition is present in other complete plumulitids and therefore widespread, which elucidates a larger diversity in morphology of plumulitids than realized previously.

Original languageEnglish
Pages (from-to)327-334
Number of pages8
JournalPalaeontology
Volume53
Issue number2
DOIs
Publication statusPublished - 1 Mar 2010

Keywords

  • Exceptional preservation
  • Head region
  • Machaeridians
  • Plumulitids
  • Segmentation

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