Taphonomy and affinity of an enigmatic Silurian vertebrate, Jamoytius kerwoodi White

Robert S Sansom, Kim Freedman, S E Gabbott, Richard J Aldridge, Mark A Purnell

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The anatomy and affinities of Jamoytius kerwoodi White have long been controversial, because its complex taphonomy makes unequivocal interpretation impossible with the methodology used in previous studies. Topological analysis, model reconstruction and elemental analysis, followed by anatomical interpretation, allow features to be identified more rigorously and support the hypothesis that Jamoytius is a jawless vertebrate. The preserved features of Jamoytius include W-shaped phosphatic scales, 10 or more pairs of branchial openings, optic capsules, a circular, subterminal mouth and a single terminal nasal opening. Interpretations of paired ‘appendages’ remain equivocal. Phylogenetic analysis places Jamoytius and Euphanerops together (Jamoytiiformes), as stem-gnathostomes rather than lamprey related or sister taxon to Anaspida.
Original languageEnglish
Pages (from-to)1393-1409
Number of pages17
JournalPalaeontology
Volume53
Issue number6
DOIs
Publication statusPublished - 2010

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taphonomy
Petromyzontiformes
optics
appendages
Silurian
mouth
vertebrate
vertebrates
stems
phylogeny
anatomy
methodology
stem
phylogenetics
analysis

Cite this

Sansom, R. S., Freedman, K., Gabbott, S. E., Aldridge, R. J., & Purnell, M. A. (2010). Taphonomy and affinity of an enigmatic Silurian vertebrate, Jamoytius kerwoodi White. Palaeontology, 53(6), 1393-1409. https://doi.org/10.1111/j.1475-4983.2010.01019.x

Taphonomy and affinity of an enigmatic Silurian vertebrate, Jamoytius kerwoodi White. / Sansom, Robert S; Freedman, Kim; Gabbott, S E; Aldridge, Richard J; Purnell, Mark A.

In: Palaeontology, Vol. 53, No. 6, 2010, p. 1393-1409.

Research output: Contribution to journalArticle

Sansom, RS, Freedman, K, Gabbott, SE, Aldridge, RJ & Purnell, MA 2010, 'Taphonomy and affinity of an enigmatic Silurian vertebrate, Jamoytius kerwoodi White', Palaeontology, vol. 53, no. 6, pp. 1393-1409. https://doi.org/10.1111/j.1475-4983.2010.01019.x
Sansom, Robert S ; Freedman, Kim ; Gabbott, S E ; Aldridge, Richard J ; Purnell, Mark A. / Taphonomy and affinity of an enigmatic Silurian vertebrate, Jamoytius kerwoodi White. In: Palaeontology. 2010 ; Vol. 53, No. 6. pp. 1393-1409.
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