Petrels have a plate called the Maxillary unguis that forms a hook on the maxilla.
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The maxilla is characterized with a shallow and narrow palate with parallel toothrows.
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The Kayenta specimen possesses four teeth in the premaxilla and sixteen in the maxilla.
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In Gorgosaurus, the first tooth in the maxilla was also shaped like the premaxillary teeth.
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A new tyrannosaurine theropod, Zhuchengtyrannus magnus is named based on a maxilla and dentary.
From the sciencedaily.com
Specifically, the connection is made between the maxilla or mandible to the cementum of the tooth.
From the en.wikipedia.org
On the upper jaw was a row of marginal labyrinthine teeth, located on the maxilla and premaxilla.
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The maxilla does not extend below the anterior margin of the eye.
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Permanent teeth in the maxilla erupt in a different order from permanent teeth on the mandible.
From the en.wikipedia.org
More examples
Upper jaw: the jaw in vertebrates that is fused to the cranium
(maxillary) of or relating to the upper jaw
The maxilla (plural: maxillae), also known as the mustache bone, is a fusion of two bones along the palatal fissure that form the upper jaw. This is similar to the mandible (lower jaw), which is also a fusion of two halves at the mental symphysis. Sometimes (e.g. ...
In certain arthropods, the maxillae are paired mouthparts located behind the mandibles. While the mandibles are used for biting or cutting food, the maxillae are used for swallowing. Maxillae are found in all arthropods except for Chelicerata, class Branchiopoda, and the extinct trilobites, i. ...
Either of the two bones that together form the upper jaw; Arachnid mouthpart
(maxillary) The jawbone; Of or relating to the jaw or jawbone
(Maxillae) The second pair of jaws in insects.
(Maxillae (sing. maxilla)) The expanded basal segments of the pedipalps..
(maxillae) Fifth pair of head appendages, functioning as mouthparts, immediately posterior to maxillules (= second maxillae).