Genus: Jemalongia YOUNG, 2024
Etymology: In reference to the Jemalong Range of cental New South Wales, Australia.

Species: ritchiei YOUNG, 2024
Etymology: In honor of the late Alexander Ritchie (15 August 1935-16 November 2023), who first learnt about the Jemalong fossil site and conducted excavations there in the 1970s, when he was curator of fossils at the Australian Museum.

Holotype: ANU V1899

Locality: Quarry near Jemalong Weir, about 20 km west of Forbes, New South Wales State, Australia.

Horizon: Cloghnan Shale, Lowest formation of the Hervey Group.

Biostratigraphy:

Age: Givetian Stage, Mid Devonian Epoch, Late Middle Devonian-Frasnian Stage, Early Late Devonian Epoch, Early Late Devonian.

Material: Incomplete left cleithrum.

Referred material:

Locality: Bundaburra Quarry, about 30 km southwest of Forbes, New South Wales State, Australia.

Horizon: Cloghnan Shale, Lowest formation of the Hervey Group.

Biostratigraphy:

Age: Givetian Stage, Mid Devonian Epoch, Late Middle Devonian-Frasnian Stage, Early Late Devonian Epoch, Early Late Devonian.

Material:

ANU V 3395, V3397-3398, 3404-3406: Impressiosn of isolated scales.