Ignacius

fossil primate genus

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July 16, 2026

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The genus Ignacius is a group of fossil primates dating back to the Paleocene epoch, approximately 60 million years ago. Fossils of Ignacius, along with Plesiadapis and Palaechthon, have been found in both Europe and North America.1

These early primates exhibited certain dental specializations. However, recent discoveries of limb bones, particularly finger bones, suggest that Ignacius and similar genera might actually belong to the order Dermoptera, which includes the modern-day colugo or "flying lemur" found in Southeast Asia. If this classification is correct, the fossil record for primates from the Paleocene epoch would be significantly reduced.1

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primate
Paleocene
…available for the genera Plesiadapis, Ignacius, and Palaechthon from Europe and North America. The skulls show a number of dental specializations, including, in the case of Plesiadapis, procumbent rodentlike incisors in the upper and lower jaw and the absence of other antemolar teeth, though the molar teeth show more plausible…
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…available for the genera Plesiadapis, Ignacius, and Palaechthon from Europe and North America. The skulls show a number of dental specializations, including, in the case of Plesiadapis, procumbent rodentlike incisors in the upper and lower jaw and the absence of other antemolar teeth, though the molar teeth show more plausible…
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