Vetulicolians from the Lower Cambrian Sirius Passet Lagerstätte, North Greenland, and the polarity of morphological characters in basal deuterostomes

Jakob Vinther*, M. Paul Smith, David A T Harper

*Corresponding author for this work

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

29 Citations (Scopus)

Abstract

Abstract: Vetulicolians are problematic Cambrian fossils with a debated phylogenetic history. Here, we describe two vetulicolian specimens from the Lower Cambrian Sirius Passet locality in North Greenland. One of the specimens is assigned to Ooedigera peeli gen. et sp. nov, whereas the other is retained under open nomenclature. The mode of tail flexibility has been debated in the literature, and we argue here that the tail normally flexed laterally to generate power strokes rather than dorsoventrally. The phylogenetic relationships of vetulicolians are discussed in the light of current knowledge of deuterostome phylogeny and morphology, and it is concluded that the best hypothesis on currently available evidence is that vetulicolians are a clade or paraphyletic assemblage of stem-Deuterostomata. The presence of a voluminous, sediment-filled anterior chamber suggests that the atrium may be a synapomorphy of deuterostomes.

Original languageEnglish
Pages (from-to)711-719
Number of pages9
JournalPalaeontology
Volume54
Issue number3
DOIs
Publication statusPublished - 1 May 2011

Keywords

  • Banffia
  • Chengjiang
  • Chordate
  • Deuterostome
  • Heteromorpha
  • Vetulicolia

Fingerprint Dive into the research topics of 'Vetulicolians from the Lower Cambrian Sirius Passet Lagerstätte, North Greenland, and the polarity of morphological characters in basal deuterostomes'. Together they form a unique fingerprint.

Cite this