Genus: Diarthrognathus CROMPTON, 1958
Etymology: Greek, di-, “two”, Greek, arthron, “joint” and Greek, gnathos, “jaw” + us (m): Double joint jaw.
= Broomitherium (nomen nudum) HUENE, 1956
Etymology: In honor of Robert Broom (1866-1951), Scottish vertebrate paleontologist and scholar of South African mammal-like reptiles.

Species: broomi CROMPTON, 1958
EEtymology: In honor of Robert Broom (1866-1951), Scottish vertebrate paleontologist and scholar of South African mammal-like reptiles.
= Broomitherium (no species name given, nomen nudum) HUENE, 1956

Holotype: Qr 1535 (Old Nas. Museum C249)

Locality: Ladybrand, Free (Orange Free) State, South Africa.

Horizon: Cave Sandstone.

Biostratigraphy:

Age: Late Triassic.

Material: Fragmentary skull and a few postcranial remains.

Referred material:

LUND, NORTON & BENOIT, 2023

NMQR 1535: Fragmentary skull and fragmentary skeleton.

 

GOW, 1994

BP/1/4882

Locality: Farm Maquatleng, Clocolan district, South Africa.

Horizon: Middle Elliot Formation.

Biostratigraphy: Tritylodon Acme-Zone.

Age: Hettangian Stage, earliest Lias Epoch, Early Jurassic.

Material: Left lower jaw fragment with teeth.