Keywords: Glyptagnostus reticulatus pygidium.jpg en Glyptagnostus reticulatus pygidium 2012-11-19 11 33 53 Pl 6 f 11; Allison R Palmer 1968 http //pubs usgs gov/pp/0559b/report pdf Cambrian trilobites of east-central Alaska Lower paleozoic paleontology and stratigraphy east-central Alaska Geological Survey Professional paper 559-B United States Geological Survey US Department of the Interior United States Government Printing Office p B28 Allison R Palmer PD-USGov-USGS PD-USGov Uploaded with UploadWizard Glyptagnostus reticulatus Trilobite pygidium |