''Casuarius lydekkeri'' is an extinct species of

cassowary Cassowaries (; Biak: ''man suar'' ; ; Papuan: ''kasu weri'' ) are flightless birds of the genus ''Casuarius'', in the order Casuariiformes. They are classified as ratites, flightless birds without a keel on their sternum bones. Cassowaries a ...

Description

Remains attributed to the species are generally around the size of the living dwarf cassowary (''Casuarius bennetti''). Remains attributed to ''C. lydekkeri'' differ from living cassowaries in a number of morphological characters, including "a shallower, narrower pelvis, more gracile femur and a narrower proximal loser to hipend to the

tarsometatarsus The tarsometatarsus is a bone that is only found in the lower leg of birds and some non-avian dinosaurs. It is formed from the fusion of several bird bones found in other types of animals, and homologous to the mammalian tarsus (ankle bones) a ...

Taxonomy

The species was originally described by

Walter Rothschild Lionel Walter Rothschild, 2nd Baron Rothschild, Baron de Rothschild, (8 February 1868 – 27 August 1937) was a British banker, politician, zoologist, and soldier, who was a member of the Rothschild family. As a Zionist leader, he was present ...

based on a partial right

tibiotarsus The tibiotarsus is the large bone between the femur and the tarsometatarsus in the leg of a bird. It is the fusion of the proximal part of the tarsus with the tibia. A similar structure also occurred in the Mesozoic Heterodontosauridae. These ...

of probable

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

age. The exact provenance is unknown, and was originally reported as coming from cave deposits near

Wellington Wellington is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the third-largest city in New Zealand (second largest in the North Island ...

in New South Wales, though this is now considered unlikely. It has alternatively been proposed that it may originate from the

Darling Downs The Darling Downs is a farming region on the western slopes of the Great Dividing Range in southern Queensland, Australia. The Downs are to the west of South East Queensland and are one of the major regions of Queensland. The name was generally ...

in Queensland based on its preservation. Other remains attributed to ''C. lydekkeri'' have been reported from the

Pliocene The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

of Australia and New Guinea, including a skeleton from bog deposits near Pureni the central highlands of

Papua New Guinea Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...

, dating to the

Late Pleistocene The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as the Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth division ...

. The taxonomy of the species has been described as "problematic", and it has been said that there "is no indication of close affinity between these fossil forms ttributed to ''C. lydekkeri''and living cassowaries", and it has been suggested that all living cassowaries are more closely related to each other than to forms attributed to ''C. lydekkeri''.

References

lydekkeri Extinct birds of Australia Pleistocene birds Flightless birds Fossil taxa described in 1911 {{Casuariiformes-stub