M425. Northeast corner of Flora Downs (Cambrian of Australia)

Where: Queensland, Australia (20.2° S, 138.9° E: paleocoordinates 26.2° N, 172.2° W)

When: Ptychagnostus atavus trilobite zone, Inca Formation, Floran (504.5 - 503.0 Ma)

• Uppermost part of formation

• member-level stratigraphic resolution

Environment/lithology: marine; cherty/siliceous siltstone and cherty/siliceous shale

• Siltstone, chert, and siliceous shale of

Size class: macrofossils

Primary reference: A. A. Öpik. 1979. Middle Cambrian agnostids: systematics and biostratigraphy. . Bureau of Mineral Resources, Geology and Geophysics, Bulletin 172:1-188 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225175: authorized by Pete Wagner, entered by Pete Wagner on 28.04.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

 Agnostida - Diplagnostidae
Diplagnostus atavorum, "Pseudoperonopsis syrma n. sp." = Acadagnostus syrma
"Pseudoperonopsis syrma n. sp." = Acadagnostus syrma Opik 1979
 Agnostida - Ptychagnostidae
Ptychagnostus atavus Tullberg 1880
Ptychagnostus atavus coartatus
"Criotypus lemniscatus" = Goniagnostus lemniscatus Öpik 1979
"Criotypus paenerugatus" = Goniagnostus lemniscatus Öpik 1979
Criotypus oxytorus Öpik 1979
Triplagnostus posterus
Triplagnostus gibbus posterus
 Agnostida - Doryagnostidae
 Agnostida - Spinagnostidae
 Agnostida - Peronopsidae
"Peronopsis ferox" = Redeagnostus ferox
"Peronopsis ferox" = Redeagnostus ferox Tullberg 1880
Peronopsis fallax ferox