Paramys

<h2 id="description">Description</h2>
<p>The <a href="/facts/Brain/EKla9NkJ">brain</a> of both the <a href="/facts/Ypresian/KdIvHqv5">Early Eocene</a> <i>P. copei</i> and the <a href="/facts/Middle_Eocene/EYgI8Uco">Middle Eocene</a> <i>P. delicatus</i> was characterised by a lower <a href="/facts/Neocortex/YEVjPgGK">neocortical</a> surface area, smaller paraflocculi, and larger <a href="/facts/Olfactory_bulb/P2xEB4es">olfactory bulbs</a> relative to total <a href="/facts/Endocranium/RJxN9qtm">endocranial</a> volume of later rodents, and they both possessed <a href="/facts/Encephalization_quotient/tw7CzCSm">encephalisation quotients</a> higher than that of <i><a href="/facts/Ischyromys/lSjqL4l2">Ischyromys typus</a></i>.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a>
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<h2 id="further-reading">Further reading</h2>
<ul><li>Matthew, W. D. 1910. On the osteology and relationships of <i>Paramys</i> and the affinities of the Ischyromyidae. <i>Bulletin of the American Museum of Natural History</i>, 28:43–72.</li>
<li>Kenneth D. Rose, 2006. <i>The Beginning of the Age of Mammals</i>. The Johns Hopkins University Press. Baltimore MD. pp. 306–335</li>
<li>Kenneth D. Rose and Brenda J. Chinnery. The Postcranial Skeleton of Early Eocene Rodents. <i>Bulletin of Carnegie Museum of Natural History</i>. Volume 36, Issue 1 (December 2004): pp. 211–244</li>
<li>Tullberg, T. 1899. Ueber das System der Nagethiere. Eine Phylogenetische Studie. <i>Nova Acta Regiae Soc. Scient Upsala</i>, ser. 3, vol. 18: v + 514 pp., 57 pls</li>
<li>Wodd A. E. 1962. The Early Tertiary rodents of the family Paramyidae. <i>Transactions of the American Philosophical Society</i>. new series 52(1): 1–261.</li></ul>
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<li>Paleontology portal</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"Glossary. American Museum of Natural History". Archived from the original on 20 November 2021. <a href="https://web.archive.org/web/20211120123130/https://research.amnh.org/paleontology/perissodactyl/concepts/glossary" target="_blank">https://web.archive.org/web/20211120123130/https://research.amnh.org/paleontology/perissodactyl/concepts/glossary</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Bertrand, Ornella C.; Amador-Mughal, Farrah; Silcox, Mary T. (27 January 2016). "Virtual endocasts of Eocene Paramys (Paramyinae): oldest endocranial record for Rodentia and early brain evolution in Euarchontoglires". Proceedings of the Royal Society B: Biological Sciences. 283 (1823): 20152316. doi:10.1098/rspb.2015.2316. ISSN 0962-8452. PMC 4795019. PMID 26817776. Retrieved 7 April 2025 – via The Royal Society Publishing. <a href="https://royalsocietypublishing.org/doi/full/10.1098/rspb.2015.2316" target="_blank">https://royalsocietypublishing.org/doi/full/10.1098/rspb.2015.2316</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
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Paramys open-in-new

Paramys