Meridiolestida

Meridiolestida
Temporal range: Turonian–Miocene (possibly extant)
Four taxa: Leonardus, Mesungulatum, Barberenia and Austrotriconodon
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Mammalia
Clade:Holotheria
Clade:Trechnotheria
Clade:Cladotheria
Superorder:†Dryolestoidea
Clade:†Meridiolestida
Rougier, 2011
Subdivisions

See below

Meridiolestida is a clade of non-therian mammals from South America and Africa, and potentially also Australia. It is generally classified within Dryolestida, barring one study recovering them as the sister taxa to spalacotheriid symmetrodonts.[1] However, more recent studies have stuck to the dryolestoid interpretation.[2][3][4] They differ from northern dryolestoids in the absence of a parastylar hook on the molariform teeth and the lack of a Meckelian groove.

A morphological study has suggested that marsupial moles might be living meridiolestidans rather than marsupials, noting inconsistency in genetic studies as well as morphological nigh-similarity with Necrolestes. This same study also claims Yalkaparidon is a meridiolestidan, albeit not exploring this in depth.[5]

Taxa

References

  1. ↑ Alexander O. Averianov, Thomas Martin and Alexey V. Lopatin (2013). "A new phylogeny for basal Trechnotheria and Cladotheria and affinities of South American endemic Late Cretaceous mammals". Naturwissenschaften. 100 (4): 311–326. doi:10.1007/s00114-013-1028-3.
  2. ↑ Agnolin, F.; Chimanto, N. (2014-12-22). "Morphological evidence supports Dryolestoid affinities for the living Australian marsupial mole Notoryctes". PeerJ Preprints. 2: e755v1. doi:10.7287/peerj.preprints.755v1. Retrieved 2015-12-30.
  3. ↑ Agustin G. Martinelli, Laura Chornogubsky, María Alejandra Abello, Marcelo A. Reguero, The first non-therian dryolestoid from Antarctica Conference Paper · August 2014 DOI: 10.13140/2.1.2770.8805 Conference: 2014 SCAR Open Science Conference, At Auckland, New Zealand, Volume: Abstracts Volume
  4. ↑ 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
  5. ↑ Agnolin, F.; Chimanto, N. (2014-12-22). "Morphological evidence supports Dryolestoid affinities for the living Australian marsupial mole Notoryctes". PeerJ Preprints. 2: e755v1. doi:10.7287/peerj.preprints.755v1. Retrieved 2015-12-30.
  6. ↑ 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. doi:10.1073/pnas.1212997109. PMC 3523863.
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