PHILLIPSIA Portlock, 1843. Phillipsia sampsoni Vogde s, 1888 (x6. 4). Chouteau Limestone,
Mississippian, Earley, Boone County, Missouri. (Loaned by FMNH.) Unusual in this trilobite is the pustulose surface of the carapace. In the region of the posterior pleural border in the vicinity of the axial furrows, the pustules degenerate into shott spines. Specimen whitened with magnesium oxide.
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