Genus: Martharaptor SENTER, KIRKLAND & DeBILEUX, 2012
Etymology: In honor of Martha Hayden, who co-discovred the site and has served as the assistant to three successive state paleontologists of Utah over a period of about 25 years, and Latin, raptor “robber”,

Species: greenriverensis SENTER, KIRKLAND & DeBILEUX, 2012
Etymology: The species name refers to the city of Green River in Emery County, Utah.

Holotype: UMNH VP 21400

Locality: Hayden-Corbett Site (Gr287v), approximately 8 mines southeast of Green River, Grand County, Utah.

Horizon: Upper Yellow Cat Member, Basal Cedar Mountain Formation.

Biostratigraphy:

Age: Buffalogapian Age, early Aptian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skeleton; all bones are fragmentary; cervical neural arch, cranial dorsal vertebrae, distal caudla centrum, ulna?, radius, scapula, ischium, possible distal pubis, presumed metacarpal I, Presumend manual phalanx I-1, 2 penultimate manual phalanx, 2 manual phalanx, 2 manual ungual digit I, 2 manual ungual digit II, 2 manual digit III, metataral I, II, III?, IV, 10 pedal phalangs, pedual ungual 1 digit II, pedal ungual.