Abstract
The most nearly complete maxilla known of the North American Late Cretaceous insectivore G. hypoconus Simpson 1927 is described. The specimen exhibits P3-4 [upper premolar 3-4] M1 [upper molar 1] in place; alveoli present anterior to P3 indicate a total of 4 upper premolars of which the 1st was single-rooted. Relationships between Gypsonictops and its presumed ancestor Kennalestes gobiensis Kielan-Jaworowska 1969 are discussed.

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