Pteraichnus Stokes 1957

JUNIOR SYNONYM(S): N/A

DESCRIPTION: Quadruped tracks with manus impressions the same axis or nearly so to the pes prints. Pes prints anteriorly located to the manus prints. Pes prints are elongated, subtriangular, plantigrade and have four digits. Digits II and III are slightly longer than digits I and IV. All digit impressions have claw impressions. Manus has three digits and is elongated, asymmetrical and digitigrade. Digit I commonly has claw impression and is anteriorly located. Digit III is posteriorly located. Digits II and III rarely have claw impressions. In well-preserved manus and pes impressions, phalanges can be observed.

BEHAVIOR(S): Repichnia (locomotion)

ENVIRONMENTAL SETTINGS: Continental terrestrial and transitional marine environments; are produced at the sediment-water-air interface.

POSSIBLE TRACEMAKERS: Pterasaurs

GEOLOGIC RANGE: Upper Jurassic–Upper Cretaceous

ADDITIONAL REFERENCES: Emended by Billon-Bruyat and Mazin, 2003. Lockley et. al., 2001, 2008. See also Fiorillo et al. 2008.

REMARKS: Found as far north as Alaska in the Late Cretaceous (Fiorillo et al. 2008)