Revision of some Australian Ptychagnostinae (Agnostida, Cambrian)

John R. Laurie*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

The taxonomic relationships of some Australian species of the agnostid subfamily Ptychagnostinae are discussed and some revisions made. The genus Ptychagnostus consists of two species, P. punctuosus and P. affinis. Zeteagnostus is emended to include Z. incautus and Z. scarifatus. Acidusus is emended to include A. atavus, A. acidusus, A. germanus, A. occultatus, A. michaeli, A. aculeatus and tentatively A. cassis. Onymagnostus includes O. hybridus, O. mundus and O. semiermis. Pentagnostus is monospecific, consisting of P. praecurrens. Triplagnostus is subdivided into two subgenera: T.(Triplagnostus) containing T.(T.) gibbus, T.(T.) scopus and T.(T.) ultimus; and T.(Aotagnostus) containing T.(A.) culminosus, T.(A.) aotus and T.(A.) magniceps.

Original languageEnglish
Pages (from-to)169-205
Number of pages37
JournalAlcheringa
Volume12
Issue number3
DOIs
Publication statusPublished - 1988
Externally publishedYes

Keywords

  • Agnostida
  • Australia
  • Middle cambrian
  • Revision
  • Trilobita

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