Cambrian series 3 agnostoid trilobites Ptychagnostus sinicus and Ptychagnostus atavus from the Machari Formation, Yeongwol Group, Taebaeksan Basin, Korea

P. S. Hong, and D. K. Choi

2015

Article

Journal of Paleontology 39(3):

Find it at:

http://dx.doi.org/10.1017/jpa.2015.30

Taxa discussed in this work:

• Acidusus
• Ptychagnostus (Acidusus)

Taxonomy:

• Ptychagnostus (Acidusus) belongs to Ptychagnostus - Opik (1979)
• Ptychagnostus atavus belongs to Ptychagnostus - Hong and Choi (2015)