''Antofagastaichthys'' is an extinct genus of ray-finned fish that lived in what is now Chile during the Oxfordian stage of the Late Jurassic epoch. It contains one species, ''A. mandibularis'', which is known from several fragmentary specimens discovered in the El Profeta Formation of

Antofagasta Province Antofagasta Province ( es, Provincia de Antofagasta) is one of three provinces in the northern Chilean region of Antofagasta (II). The capital is the port city of Antofagasta. Located within the Atacama Desert, it borders the El Loa and Tocopil ...

. The relationships of ''Antofagastaichthys'' to other fishes is uncertain; it has been compared to both Pachyrhizodontoidei (an extinct group of basal teleosts mostly known from the Cretaceous) and the extant order Elopiformes (which includes the modern ladyfish and tarpons).

References

Ray-finned fish enigmatic taxa Prehistoric ray-finned fish genera Jurassic fish of South America Late Jurassic bony fish Jurassic Chile Fossils of Chile Fossil taxa described in 1986 {{Jurassic-fish-stub