The most nearly complete maxilla known of the North American Late Cretaceous insectivore Gypsonictops hypoconus Simpson 1927 is described. The specimen exhibits P3–4M1 in place; alveoli present anterior to P3 indicate a total of four upper premolars of which the first was single-rooted. Relationships between Gypsonictops and its presumed ancestor Kennalestes gobiensis Kielan-Jaworowska 1969 are discussed.

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