''Struthio anderssoni'', also known as the East Asian ostrich, is an extinct species of ostrich that lived in the Pleistocene and Holocene in China and Mongolia. The youngest dates obtained by

mass spectrometry Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a ''mass spectrum'', a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used ...

analysis of

eggshell An eggshell is the outer covering of a hard-shelled egg (biology), egg and of some forms of eggs with soft outer coats. Worm eggs Nematode eggs present a two layered structure: an external vitellin layer made of chitin that confers mechanical ...

fragments reveal that the species survived until at least 8.9 ka BP.

Description

''Struthio anderssoni'' was a large ostrich with an estimated mass of 270kg, laying eggs of up to 2400 cm³ in volume. In 2023, based on a re-examination of cast of a femur, it was suggested that this species be moved to the genus ''

Pachystruthio ''Pachystruthio'' is a genus of extinct bird which lived in Eurasia from the Late Pliocene to the Middle Pleistocene. Its fossils have been found in Hungary, Greece Crimea, Georgia (country), Georgia, and China. The genus contains three species: ...

''.

References

{{Taxonbar, from=Q12642882 Ostriches Extinct flightless birds Late Quaternary prehistoric birds Neogene birds of Asia Pleistocene birds Holocene extinctions Extinct birds of Asia Quaternary birds of Asia Fossil taxa described in 1931