Eurotamandua Explained

Eurotamandua ("european Tamandua") is an extinct genus of mammal from extinct family Eurotamanduidae that lived during the middle Eocene.[1]

A single fossil is known, coming from the Messel Pit in southwestern Germany. Eurotamandua was about long. Most palaeontologists now classify Eurotamandua as a pangolin. When its fossils were first discovered, Eurotamandua was originally thought to be an anteater, as it lacked the characteristic fused-hair scales of other pangolins. Eurotamandua placement within the pangolins was made primarily because of a lack of the characteristic "xenarthran" joints found in all xenarthrans, including tamanduas.

There is still much ambiguity in the taxonomy of all mammals prior to the Eocene, so there is the possibility that Eurotamandua was a primitive xenarthran. However, this is highly unlikely because all known fossil evidence indicates that xenarthrans existed exclusively in South America from the beginning of the Cenozoic era until the formation of the Panama land bridge 3 million years ago, after which they spread to North America (but never to Eurasia or Africa). Another possibility is that Eurotamandua belongs to another group of mammals which appeared around its time, the Afredentata (probably part of Afrotheria).[2] Eurotamandua is currently thought to be a stem-pangolin, closer to crown pangolins than Palaeanodonta and Euromanis but more basal than Eomanis and Necromanis.

Paleobiology

Eurotamandua bears characteristics found in almost all ant-eating mammals: long claws, an elongated snout, and most likely the same long, sticky tongue. These features led Eurotamandua to be initially misclassified as a xenarthran anteater, which was common for many ant-eating mammals prior to the 20th century. Presumably it also fed on ants and termites.[3] The generic name comments on the strong, albeit possibly superficial resemblance to modern arboreal anteaters of the genus Tamandua, especially with its long, prehensile tail.

Phylogeny

Phylogenetic position of genus Eurotamandua within order Pholidota.[4] [5]

See also

External links

Notes and References

  1. Delsuc . Frédéric . Vizcaíno . Sergio F. . Douzery . Emmanuel JP . 2004-04-28 . Influence of Tertiary paleoenvironmental changes on the diversification of South American mammals: a relaxed molecular clock study within xenarthrans . BMC Evolutionary Biology . 4 . 1 . 11 . 10.1186/1471-2148-4-11 . 1471-2148 . 419338 . 15115541 . free .
  2. Hunter, John P. and Janis, Christine M. 2006. "Spiny Norman in the Garden of Eden? Dispersal and early biogeography of Placentalia." J Mammal Evol 13:89–123
  3. Book: Palmer, D.. 1999 . The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals . Marshall Editions . London . 209 . 1-84028-152-9.
  4. Gaudin . Timothy . 2009 . The Phylogeny of Living and Extinct Pangolins (Mammalia, Pholidota) and Associated Taxa: A Morphology Based Analysis . Journal of Mammalian Evolution . Springer Science+Business Media . Heidelberg, Germany . 16 . 4 . 235–305 . 10.1007/s10914-009-9119-9 . 1773698 . 16 November 2020 . 25 September 2015 . https://web.archive.org/web/20150925134257/http://web2.utc.edu/~gvv824/Gaudin%20et%20al%202009.pdf . dead .
  5. Kondrashov . Peter . Agadjanian . Alexandre K. . A nearly complete skeleton of Ernanodon (Mammalia, Palaeanodonta) from Mongolia: morphofunctional analysis . Journal of Vertebrate Paleontology . 32 . 5 . 2012 . 0272-4634 . 10.1080/02724634.2012.694319 . 983–1001. 2012JVPal..32..983K . 86059673 .