Meridiolestida

Meridiolestida is an extinct clade of cladotherian mammals from South America, Antarctica,[1] and possibly North America.[2] They represented the dominant group of mammals in South America during the Late Cretaceous.[3] They are generally classified within Dryolestida, barring one study recovering them as the sister taxa to spalacotheriid symmetrodonts.[4] However, more recent studies have stuck to the dryolestoid interpretation.[5][6] They differ from northern dryolestoids in the absence of a parastylar hook on the molariform teeth and the lack of a Meckelian groove. The latest surviving member is the mole-like Necrolestes, known from the Miocene of Patagonia.[7]

Meridiolestida
Temporal range:
Life restoration of Cronopio
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Trechnotheria
Clade: Cladotheria
Superorder: †Dryolestoidea
Order: †Dryolestida
Clade: †Meridiolestida
Rougier, 2011
Subgroups

See text

Taxa

References
  1. Gelfo, Javier N.; Goin, Francisco J.; Bauzá, Nicolás; Reguero, Marcelo (30 September 2019). "The fossil record of Antarctic land mammals: Commented review and hypotheses for future research". Advances in Polar Science: 274–292. doi:10.13679/j.advps.2019.0021.
  2. Martin, Thomas; Averianov, Alexander O.; Schultz, Julia A.; Schwermann, Achim H.; Wings, Oliver (2021). "A derived dryolestid mammal indicates possible insular endemism in the Late Jurassic of Germany". The Science of Nature. 108 (3): Article number 23. Bibcode:2021SciNa.108...23M. doi:10.1007/s00114-021-01719-z. PMC 8126546. PMID 33993371.
  3. Defler, Thomas (2019), "Ancient Mammals of Gondwanan South America", History of Terrestrial Mammals in South America, Cham: Springer International Publishing, vol. 42, pp. 29–44, doi:10.1007/978-3-319-98449-0_2, ISBN 978-3-319-98448-3, retrieved 2022-01-15
  4. Averianov, Alexander O.; Martin, Thomas; Lopatin, Alexey V. (2013). "A new phylogeny for basal Trechnotheria and Cladotheria and affinities of South American endemic Late Cretaceous mammals". Naturwissenschaften. 100 (4): 311–326. Bibcode:2013NW....100..311A. doi:10.1007/s00114-013-1028-3. PMID 23494201. S2CID 18504005.
  5. Martinelli, Agustin; Chornogubsky, Laura; Abello, María; I. Goin, Francisco; Reguero, Marcelo (2014). The first non-therian dryolestoid from Antarctica. 2014 SCAR Open Science Conference. Aukland, New Zealand. doi:10.13140/2.1.2770.8805.
  6. O’Meara, Rachel N.; Thompson, Richard S. (2014). "Were There Miocene Meridiolestidans? Assessing the Phylogenetic Placement of Necrolestes patagonensis and the Presence of a 40 Million Year Meridiolestidan Ghost Lineage". Journal of Mammalian Evolution. 21 (3): 271–284. doi:10.1007/s10914-013-9252-3. S2CID 880380.
  7. Richard Stephen Thompson, Rachel O'Meara, Were There Miocene Meridiolestidans? Assessing the Phylogenetic Placement of Necrolestes patagonensis and the Presence of a 40 Million Year Meridiolestidan Ghost Lineage, Article in Journal of Mammalian Evolution · September 2014 doi:10.1007/s10914-013-9252-3
  8. Guillermo W. Rougier, John R. Wible, Robin M. D. Beck and Sebastian Apesteguía (2012). "The Miocene mammal Necrolestes demonstrates the survival of a Mesozoic nontherian lineage into the late Cenozoic of South America". Proceedings of the National Academy of Sciences of the United States of America. 109 (49): 20053–20058. Bibcode:2012PNAS..10920053R. doi:10.1073/pnas.1212997109. PMC 3523863. PMID 23169652.{{cite journal}}: CS1 maint: uses authors parameter (link)
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