Faunal turnovers of Palaeogene mammals from the Mongolian Plateau

Article Abstract:

Palaeogene faunal turnovers in Central Asia and their possible links to climatic changes were studied from analyses of 454 species from the Mongolian Plateau of China and Mongolia. A numerical clustering method was used to correlate the local faunas, converting the clusters to a sequence of local mammal ages, based on stratigraphic occurrences. Late Palaeocene and Oligocene faunas clustered as one group, although Eocene faunas may or may not form a single group, suggesting taxonomic differentiations within faunas of the Paleogene epochs.

Observations, Animals, Fossil, Fossil animals

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Monotreme affinities and low-frequency hearing suggested by multituberculate ear

Article Abstract:

Multituberculates may have had bone-conducted hearing and were incapable of high-frequency airborne vibration reception as suggested by the analysis of a multituberculate ectotymphanic bone from the Mesozoic period. The fossil contains two well-preserved auditory regions showing a unique incorporation of the angular and particular bones into the middle ear of multituberculates. The morphology and orientation exhibited by these organs are similar to that of the platypus and echidnas, suggesting similar ancestry.

Discovery and exploration, Paleontology, Mesozoic Era, Malleus (Ear), Malleus

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Multituberculate and other mammal hair recovered from Palaeogene excreta

Article Abstract:

Hair from extinct mammals has been lifted from fossil excrement from the Late Palaeocene beds of Inner Mongolia, China. The unique depositional occurrene consists of mammalian carnivore coprolitesand raptorial bird regurgitalities. Hair from at least four taxa, the most notable of which is the multituberculate Lambdopsalis bulla, has been identified. The find proves that multituberculates were hirsute, along with monotremes and therian mammals.

Research, Hair, Excretion

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