Pederpes

Pederpes
Temporal range: Tournasian, Early Carboniferous
Illustration of the holotype fossil slab
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Sarcopterygii
Clade: Tetrapodomorpha
Clade: Stegocephali
Family: Whatcheeriidae
Genus: Pederpes
Clack, 2002
Species:
P. finneyae
Binomial name
Pederpes finneyae
Clack, 2002

Pederpes ("Peter's Foot") is an extinct genus of early Carboniferous stegocephalian, dating from 348 to 347.6 Ma in the Tournaisian age (lower Mississippian). Pederpes contains one species, P. finneyae, 1 m long.

This most basal Carboniferous stegocephalian had a large, somewhat triangular head, similar to that of later American sister-genus Whatcheeria, from which it is distinguished by various skeletal features, such as a spike-like latissimus dorsi (an arm muscle) attachment on the humerus and several minor skull features. The feet had characteristics that distinguished it from the paddle-like feet of the Devonian Ichthyostegalia and resembled the feet of later, more terrestrially adapted Carboniferous forms. Pederpes is the earliest-known tetrapod to show the beginnings of terrestrial locomotion and despite the probable presence of a sixth digit on the forelimbs it was at least functionally pentadactyl.


Pederpes

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