The Aglegal Member has also yielded unambiguous examples of the pseudosuchian ichnotaxon Chirotherium
barthii, which is restricted to Middle Triassic strata elsewhere (Klein et al.
The Wirral prints, which cover a 30-foot slab, caught a snapshot of the day, many, many millennia ago, when a chirotherium - thought to have resembled a short-snouted longlegged crocodile - ambled by.
Chirotherium - literally "hand beast" - was a carnivorous lizard predecessor to the dinosaurs and lived approximately 242m years ago, during the Triassic period.
Footprints of the chirotherium
dinosaur were found in Storeton Quarry in 1838, and others on Hilbre Island in 1993.
It included what would become a hallmark of his contributions: he demonstrated that two specimens held by two different institutions and said to be from different states (Pennsylvania and New Jersey) were, in fact, part and partial counterpart of the same specimen, the type of the ichnospecies Chirotherium lulli, most likely made by pseudosuchian reptiles and collected from Milford, New Jersey.
Chirotherium lulli, a pseudosuchian reptile from New Jersey.
CHIROTHERIUM tracks can still be seen in stone, above, over the porch of Christ Church, in Higher Bebington.
SEE the Chirotherium tracks at World Museum Liverpool, William Brown Street, Liverpool.
The print, from a crocodile-type Chirotherium
dinosaur, has excited experts after the unlikely find.
Footprints, said to be of Chirotherium
dinosaurs, have been found.
In fact, his life could have been lived without any great highs, or any great lows, had it not been for the vulgar and aggressive Chirotherium
who liked to eat him, when not leaving his footprints in the sand for the palaeontologists of the future.
Instantly recognisable to experts as the footprint of a Chirotherium
dinosaur, it is the first time a "new" print has been discovered in the Warrington area for almost a century.