Trilobita

Ptychagnostus praecurrens (Westergård, 1936)

Synonymy list
2007     Ptychagnostus praecurrens (Westergård) — Rushton & Weidner, pp. 394
Selection of related publications
Rushton, A. W. A., Weidner, T. 2007. The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden. Acta Geologica Polonica 57, 4, 391-401.
References based on distribution