Ptychagnostus atavus Tullberg 1880 (trilobite)

Trilobita - Agnostida - Ptychagnostidae

Alternative combinations: Acidusus atavus, Agnostus atavus, Ptychagnostus (Acidusus) acidusus

Full reference: S. A. Tullberg. 1880. Om Agnostus-arterna i de Kambriska aflagringame vid Andrarum. Sveriges Geologiska Undersökning (series C) 42:1-37

Belongs to Ptychagnostus according to P. S. Hong and D. K. Choi 2015

See also Tullberg 1880, Weidner and Nielsen 2014 and Westrop et al. 1996

Sister taxa: Ptychagnostus (Acidusus), Ptychagnostus (Ptychagnostus), Ptychagnostus acidusus, Ptychagnostus aculeatus, Ptychagnostus aksayensis, Ptychagnostus convexus, Ptychagnostus cuyanus, Ptychagnostus intermedius, Ptychagnostus karatauensis, Ptychagnostus leptus, Ptychagnostus punctuosus, Ptychagnostus seminula, Ptychagnostus sinicus, Ptychagnostus spinosus

Type specimen: LO354T, a cephalon/head

Ecology: nektonic suspension feeder

Distribution:

• Marjumian of Canada (1: Newfoundland and Labrador collection)

• Cambrian of Australia (1), Canada (3: New Brunswick, Newfoundland and Labrador), China (24), Kazakhstan (8), Norway (1), United States (12: Montana, Nevada, Utah)

Total: 50 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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