Luckeus  Luckeus is a genus of prehistoric lobe-finned fish. "Luckeus" belonged to the group of onychodontid fishes. It lived during the Early Devonian to Middle Devonian period (Emsian to Eifelian faunal stages) in central Australia. "Luckeus" is only known by a left lower jaw, which is the holotype (ANU V2969) of the genus, and also by some isolated teeth (ANU V3108-3112). Before palaeontologists establish a genus name for these remains, they referred to them as "onychodontid" and "crossopterygian" remains, or more specific as "onychodontid teeth remains". In 2005, palaeontologists Gavin Young and Hans-Peter Schultze described these findings and assigned them to a new genus under the name "Luckeus". Young and Schultze named "Luckeus" after the nickname "Lucke" of the late palaeontologist Dr. Hans Ludolph Jessen due to his major study of Paleozoic bony fish. The type species, "Luckeus abudda", named after the Abudda Lakes located in the Simpson Desert, about 15 kilometers of the fossil formation.