Filikomys

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Filikomys
Temporal range: 72  Ma
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Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order:† Multituberculata
Superfamily:† Ptilodontoidea
Genus:† Filikomys
Weaver, 2020
Species
  • F. primaevus Lambe, 1902 [1]
  • F. minor? Eaton, 2002 [2]
Synonyms

Filikomys is an extinct genus of mammal from the Campanian of North America. A multituberculate, it demonstrates complex social behaviours were present in these early mammals. [3] The type species is F. primaevus; a second, smaller species, F. minor, has been tentatively assigned to the genus. [4]

Contents

Description

Filikomys primaevus is a roughly squirrel sized mammal. Several individuals were found within the same locale. The holotype is a dentary, NMC 1890. [3]

Etymology

From Greek Filikós "friendly", and mys, mouse, alluding to its social behaviour. Primaevus is Latin for youthful. [3]

Classification

Filikomys primaevus is nested among the Ptilodontoidea. [3]

Social behaviour

Several individuals were found co-habitating a burrow. This suggests multituberculates had complex social behaviours like modern mammals, [3] which in particular have been compared to the social complexity of placentals. [5]

References

  1. ↑ Lambe L., M. (1902-12-31). "New genera and species from the Belly River Series (mid-Cretaceous)". Contributions to Canadian Palaeontology. 3. Geological Survey of Canada: 25–81. doi:10.5281/ZENODO.3233762.
  2. ↑ Eaton, Jeffrey G. (2002). Multituberculate mammals from the Wahweap (Campanian, Aquilan) and Kaiparowits (Campanian, Judithian) formations, within and near Grand Staircase-Escalante National Monument, southern Utah. Miscellaneous publication / Utah Geological Survey. Utah Geological Survey. Salt Lake City, Utah: Utah Geological Survey. ISBN   978-1-55791-665-5. OCLC   50182092.
  3. 1 2 3 4 5 Weaver, Lucas N.; Varricchio, David J.; Sargis, Eric J.; Chen, Meng; Freimuth, William J.; Wilson Mantilla, Gregory P. (2 November 2020). "Early mammalian social behaviour revealed by multituberculates from a dinosaur nesting site". Nature Ecology & Evolution. 5 (1): 32–37. doi:10.1038/s41559-020-01325-8. PMID 33139921. S2CID 226241443.
  4. ↑ Weaver, Lucas N.; Varricchio, David J.; Sargis, Eric J.; Chen, Meng; Freimuth, William J.; Wilson Mantilla, Gregory P. (2020-11-02). "(Supplementary information) Early mammalian social behaviour revealed by multituberculates from a dinosaur nesting site". Nature Ecology & Evolution. 5 (1): 32–37. doi:10.1038/s41559-020-01325-8. ISSN   2397-334X.
  5. ↑ Urton, James (25 July 2022). "New study challenges old views on what's 'primitive' in mammalian reproduction". UW News. Retrieved 6 April 2024.
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