Historical and Archaeological Findings in News

Species in news: Jeholbaatar kielanae

Note4Students

From UPSC perspective, the following things are important :

Prelims level : Jeholbaatar kielanae

Mains level : Not Much


  • Researchers have unearthed well-preserved middle ear bones from a new species of an extinct rodent that lived 145-66 million years ago in northeastern China.
  • This finding may lead to better understanding of the evolution of hearing.

Jeholbaatar kielanae

  • The study looked at fossils of the extinct rodent-like mammal — Jeholbaatar kielanae — at Jehol Biota of China, and noted that these animals had a middle ear that is distinct from those of its relatives.
  • The evolution of the rodent’s bones and muscles involved in hearing may have been driven by specialisation for hearing.
  • The fossil clues provide solid evidence of the morphology and formation of the inner ear bones, which are fully detached from the lower jaw.
  • In these extinct mammals, the evolution of the middle ear may have probably been triggered by functional constraints on the bones and muscles involved in feeding.
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