Bifurculapes Hitchcock, 1858

REMARKS: Bifurculapes resembles other ichnogenera erected by Hitchcock, including Acanthichnus, Conopsoides, Copeza, Grammepus, Hamipes, Harpagopus, Harpepus, Lithographus, Sagittarius and Stratipes (Minter and Braddy 2009). However, most of these ichnogenera are also in need of revision, which is beyond the scope of this paper; consequently, except for Lithographus and Copeza, their relationships to Bifurculapes will be discussed elsewhere. Copeza with Lithographus was revised by Minter and Braddy (2009) based on a large number of specimens found in the Permian Robledo Mountains Formation of New Mexico.

Emended Diagnosis. A trackway consisting of two rows of elongate, straight or crescentic imprints arranged in staggered to alternating series of one to three tracks. Tracks are of different lengths, with the two larger tracks in each series oriented posterolaterally and their anterior tips forming a line nearly perpendicular to the trackway midline. The smallest track is oriented oblique or perpen-dicular to the trackway axis. The longest track is almost always on the outside of the trackway, with the middle length track on the inside and the smallest track between the other two.