30422 - Top Well Preserved 0.34 Inch Ptychagnostus michaeli Middle Cambrian Trilobite - Utah USA
30422 - Top Well Preserved 0.34 Inch Ptychagnostus michaeli Middle Cambrian Trilobite - Utah USA 30422 - Top Well Preserved 0.34 Inch Ptychagnostus michaeli Middle Cambrian Trilobite - Utah USA 30422 - Top Well Preserved 0.34 Inch Ptychagnostus michaeli Middle Cambrian Trilobite - Utah USA

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30422 - Top Well Preserved 0.34 Inch Ptychagnostus michaeli Middle Cambrian Trilobite - Utah USA

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Species
Ptychagnostus michaeli sp
Age
Middle Cambrian,(~509 Million Years)
Location
Millard County, Utah, USA
Formation
Marjum Formation
Size
8.6 mm   •    in
Weight
76 g   •    oz
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Description
Ptychagnostus, Jaekel 1909 (trilobite)
Trilobita - Agnostida - Ptychagnostidae

PaleoDB taxon number: 19306

Synonym: Aotagnostus Opik 1979 (taxon 19183)

Parent taxon: Ptychagnostidae according to H. B. Whittington et al. 1997

See also Jell and Adrain 2002, Sepkoski 2002 and Westrop et al. 1996

Sister taxa: Acidusus, Goniagnostus, Lejopyge, Myrmecomimus, Onymagnostus, Pentagnostus, Tomagnostus, Triplagnostus, Yakutiana, Zeteagnostus

Subtaxa: Aotagnostus minutus, Ptychagnostus (Acidusus), Ptychagnostus (Ptychagnostus), Ptychagnostus acidusus, Ptychagnostus aculeatus, Ptychagnostus aksayensis, Ptychagnostus atavus, Ptychagnostus convexus, Ptychagnostus culminosus, Ptychagnostus cuyanus, Ptychagnostus intermedius, Ptychagnostus karatauensis, Ptychagnostus leptus, Ptychagnostus punctuosus, Ptychagnostus seminula, Ptychagnostus sinicus, Ptychagnostus spinosus

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Ecology: nektonic suspension feeder

Environments: slope (11 collections), marine (8), carbonate (6), offshore shelf (6), basinal (carbonate) (3), shallow subtidal (2), deep subtidal shelf (2), open shallow subtidal (2), deep subtidal (1), deep-water (1), shoreface (1), offshore (1), deep subtidal ramp (1)

Age range: 505.0 to 498.5 Ma
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