Genus: Alexornis BRODKORB, 1976
Etymology: Greek, alexo, "I defend" and Greek, orins (common gender, masculine selected here), "bird." On the occasion of his ninetieth birthday this genus is dedicated to my friend (Pierce Brodkorb) Alexander Witmore, who, in addition to his many other accomplishments, has done more to foster paleornithology and has described more species of fossil birds than any other author.

Species: antecedens BRODKORB, 1976
Etymology: Latin, antecedens, "going before in rank or time, ancestral": in reference to the supposed ancestry of this bird to the orders Piciformes and Coraciiformes.

Holotype: IGM 2900 (formerly LACM 33213)

Locality: LACM locality 7256, 6 miles southwest of El Rosario, Baja California del Norte, Baja California State, Mexico.

Horizon: La Bocana Roja Formation.

Biostratigraphy:

Age: Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Distal end of right humerus, left scapula scrap, proximal end of right ulna, left femur.

Alexornis antecedens. A) Holotype Right humerus in palmar view; B) anconal view; C) Left coracoid in ventral view (originally stated as the left scapula and was corrected by Martin, 1983)); D) Same in dorsal view; E) Left scapula in anterior view (originally states as the left coracoid and was corrected by Martin, 1983); F) Same in posterior view; G) Right ulna in internal view; H) Same in external view; I) Right tiobiotarsus, anterior view; J) Same in posterior view; K) Left femur anterior view; L) same in posterior view; M) Same in lateral view. (After Brodkorb, 1976).

Note: Now lost.

Paratype: Distal end of left humerus.

Note: Now lost.