Species: archibaldi CIFELLI, 1990 (Type)
Etymology: In honor of David Archibald.

Holotype:

Locality: OMNH locality V2, Garfield County, Utah.

Horizon: Middle Wahweap Formation.

Biostratigraphy:

Age: Aquilian in age, Lower Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

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Species: delicatus CIFELLI, 1990
Etymology:

Holotype: OMNH 20374

Locality: OMNH locality V4, Garfield County, Utah.

Horizon: Smoky Hollow Member, Straight Cliffs Formation.

Biostratigraphy:

Age: Upper Turonian Stage, upper Gallic subepoch, lower Gulf Epoch, Early Late Cretaceous.

Material: LUM2 or 3 lacking the protocone and anterior corner of the stylar shelf.

Hypodigm:

OMNH 20375: LUM4.

OMNH 20034: RUM4.