English: A drawing of Mallagnostus desideratus, a trilobite of the Agnostida order, Weymouthiidae family, cephalon, from the upper Lower Cambrian collected in New York state, holotype
Cephalon drawn from a photograph, as printed in the Treatise on Invertebrate Paleontology, Part O, Arthropoda 1, Revised, Trilobita, vol. 1 (1997), figure 248, 1a
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