New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia
Numerous exquisitely preserved mammal fossils unearthed from Upper Cretaceous strata in the Gobi Desert of Mongolia have played a key role in understanding Mesozoic mammalian evolution. These splendid mammal fossils have been recovered mainly from the Baruungoyot and Djadokhta formations, but o...
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| Format: | Article |
| Language: | English |
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Institute of Paleobiology PAS
2025-03-01
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| Series: | Acta Palaeontologica Polonica |
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| Online Access: | https://www.app.pan.pl/archive/published/app70/app012132024.pdf |
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| author | TSUKASA OKOSHI RYUJI TAKASAKI KENTARO CHIBA MASAHITO NATORI MOTOTAKA SANEYOSHI AKIO TAKAHASHI SHOTA KODAIRA SHOJI HAYASHI SHINOBU ISHIGAKI BUUVEI MAINBAYAR KHISHIGJAV TSOGTBAATAR |
| author_facet | TSUKASA OKOSHI RYUJI TAKASAKI KENTARO CHIBA MASAHITO NATORI MOTOTAKA SANEYOSHI AKIO TAKAHASHI SHOTA KODAIRA SHOJI HAYASHI SHINOBU ISHIGAKI BUUVEI MAINBAYAR KHISHIGJAV TSOGTBAATAR |
| author_sort | TSUKASA OKOSHI |
| collection | DOAJ |
| description | Numerous exquisitely preserved mammal fossils unearthed from Upper Cretaceous strata in the Gobi Desert of Mongolia
have played a key role in understanding Mesozoic mammalian evolution. These splendid mammal fossils have been
recovered mainly from the Baruungoyot and Djadokhta formations, but only two fragmentary remains of mammals have
been collected from the underlying Bayanshiree Formation. Here we report a new species of Zhelestidae, Ravjaa ishiii
gen. et sp. nov., based on a new mammal specimen recently discovered from the Bayanshiree Formation at the Bayan
Shiree locality. The new specimen is represented by a well-preserved partial right dentary with the distal portion of an
ultimate premolar and the first to the third molars. The gross observation and the phylogenetic analyses demonstrate
zhelestid affinities: the subequally tall protoconid and metaconid, closely approximated hypoconulid and entoconid.
Zhelestidae was widely distributed from Eurasia to North America in the Late Cretaceous but has not previously been
recovered in the abundant Late Cretaceous mammalian fauna of Mongolia. This species represents the first zhelestid
from the Mongolian Upper Cretaceous strata and contributes to further understanding of their paleobiogeographic and
ecological insights. |
| format | Article |
| id | doaj-art-b1619decb56544ee8241aa09bd60d9e5 |
| institution | OA Journals |
| issn | 1732-2421 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Institute of Paleobiology PAS |
| record_format | Article |
| series | Acta Palaeontologica Polonica |
| spelling | doaj-art-b1619decb56544ee8241aa09bd60d9e52025-08-20T01:48:16ZengInstitute of Paleobiology PASActa Palaeontologica Polonica1732-24212025-03-01701 19320310.4202/app.01213.2024New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, MongoliaTSUKASA OKOSHI0https://orcid.org/0009-0001-4884-315XRYUJI TAKASAKIKENTARO CHIBAMASAHITO NATORIMOTOTAKA SANEYOSHIAKIO TAKAHASHISHOTA KODAIRASHOJI HAYASHISHINOBU ISHIGAKIBUUVEI MAINBAYARKHISHIGJAV TSOGTBAATARGraduate School of Science and Engineering, Okayama University of Science, Okayama, Japan. Numerous exquisitely preserved mammal fossils unearthed from Upper Cretaceous strata in the Gobi Desert of Mongolia have played a key role in understanding Mesozoic mammalian evolution. These splendid mammal fossils have been recovered mainly from the Baruungoyot and Djadokhta formations, but only two fragmentary remains of mammals have been collected from the underlying Bayanshiree Formation. Here we report a new species of Zhelestidae, Ravjaa ishiii gen. et sp. nov., based on a new mammal specimen recently discovered from the Bayanshiree Formation at the Bayan Shiree locality. The new specimen is represented by a well-preserved partial right dentary with the distal portion of an ultimate premolar and the first to the third molars. The gross observation and the phylogenetic analyses demonstrate zhelestid affinities: the subequally tall protoconid and metaconid, closely approximated hypoconulid and entoconid. Zhelestidae was widely distributed from Eurasia to North America in the Late Cretaceous but has not previously been recovered in the abundant Late Cretaceous mammalian fauna of Mongolia. This species represents the first zhelestid from the Mongolian Upper Cretaceous strata and contributes to further understanding of their paleobiogeographic and ecological insights.https://www.app.pan.pl/archive/published/app70/app012132024.pdfmammaliaeutheriacretaceousbayanshiree formationmongolia |
| spellingShingle | TSUKASA OKOSHI RYUJI TAKASAKI KENTARO CHIBA MASAHITO NATORI MOTOTAKA SANEYOSHI AKIO TAKAHASHI SHOTA KODAIRA SHOJI HAYASHI SHINOBU ISHIGAKI BUUVEI MAINBAYAR KHISHIGJAV TSOGTBAATAR New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia Acta Palaeontologica Polonica mammalia eutheria cretaceous bayanshiree formation mongolia |
| title | New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia |
| title_full | New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia |
| title_fullStr | New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia |
| title_full_unstemmed | New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia |
| title_short | New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia |
| title_sort | new late cretaceous zhelestid mammal from the bayanshiree formation mongolia |
| topic | mammalia eutheria cretaceous bayanshiree formation mongolia |
| url | https://www.app.pan.pl/archive/published/app70/app012132024.pdf |
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