Species: browni BROOM, 1906
Etymology:

Holotype: SAM-PK 5871

Locality: Aliwal North, Eastern Cape Province, South Africa.

Horizon: Burgersdorp Formation, Tarkastad Subgroup.

Biostratigraphy: Cynognathus zone.

Age: Spathian Stage, uppermost Scythian Epoch to Anisian Stage, lowermost Mid Triassic Epoch, Early to Middle Triassic.

Material: Fragmentary dentary.

Note: Broom (1906) placed Palacrodon in Rhynchocephalia; Malan (1963) disagreed and suggested it was either a lizard or procolophonid. Gow (1999) synonymized Fremouwsaurus geludens (Gow, 1992) with Palacrodon. Kligman et al. (2018) place it within Diapsida.

Referred material:

GOW, 1999

BP/1/5672: Right maxillary fragment bearing 4 acrodont teeth and a dentary fragment bearing 5. May belong to the type.
Note: = Family: Palacrodontidae HAUGHTON 1924

 

 

= Fremouwsaurus geludens GOW, 1992
Etymology: Latin gelu = front and dens = Teeth: the name is suggested because of the remarkable resemblance of the cheek teeth to blobs of decorative frosting on a cake.

Holotype: BP/1/5296

Locality: Kitching Ridge, vicinity of Shackleton Glacier, which is about 225 km, east by south of Coalsack Bluff, Queen Maud Mountains, East Antarctica, Antarctica.

Horizon: Fremouv Formation.

Biostratigraphy:

Age: Anisian Stage, Lower Mid Triassic Epoch, Early Middle Triassic.

Material: Partial skull and lower jaw an some fragments of postcranial skeleton.
Note: = Family: Fremouwsauridae GOW, 1992.

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Species: parkeri JENKINS, BELL, HANCOX & LEWIS, 2023 (published 2024)
Etymology: In honor of William G. ('Bill') Parker, in recognition of his extensive contributions to knowlege of the stratigrtaphy and paleontology of the Triassic deposites in the western United States, and particularly to those from Peterified Forest National Park. We also honor his efforts to encourghed and facilitate the engagement of young scientists in the study of geosciences.
= Palacrodon browni KLIGMAN, MARSH & PARKER, 2018

Holotype: PEFO 37247

Locality: PFV 396, the "coprolite layer" near Billing's Gap, Petrified Forest National Monument, Apache County, Arizona.

Note: Exact locality informatin is on file at Petrified Forest National Park and available to qualified researchers.

Horizon: Upper Blue Mesa Member, Chinle Formation.

Biostratigraphy: Adamanian Land Vertebrate Estimated Holochron (Adamanian Land Vertebrate Faunachron).

Age: Middle Norian Stage, Late Triassic Epoch, Late Triassic.

Material: Fragment of a right maxilla with two complete teeth and two partial teeth.