Fossiomanus
This article relies largely or entirely on a single source. (April 2021) |
Fossiomanus Temporal range:
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Synapsida |
Clade: | Therapsida |
Clade: | Cynodontia |
Family: | †Tritylodontidae |
Genus: | †Fossiomanus Mao et al., 2021 |
Species: | †F. sinensis
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Binomial name | |
†Fossiomanus sinensis Mao et al., 2021
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Fossiomanus is an extinct genus of
Fossiomanus lived roughly 120 million years ago, making it potentially the geologically youngest known tritylodontid, which would also make it the last known non-mammalian synapsid.
Discovery and naming
Fossiomanus sinensis was named in 2021 by Fangyuan Mao, Chi Zhang, Cunyu Liu, and Jin Meng, on the basis of the holotype specimen, JZMP-2107500093, a nearly complete skeleton with a damaged skull from the Jiufotang Formation of Liaoning. The genus name is derived from Latin fossio "digging" and manus "hand" and the species name means "from China".[1]
Description
Fossiomanus was 316 millimetres (12.4 in) long, excluding the 65 millimetres (2.6 in)-long tail, with a generally stocky build. Its pointed snout and short tail gave it an overall fusiform body plan. It had an elongate torso, with 26 thoracic vertebrae and 5 lumbar vertebrae. The front foot was broad and robust, with large claws.[1]
Paleobiology
Tritylodontids such as Fossiomanus were herbivores. Fossiomanus was a fossorial taxon, with its powerful forelimbs being used for digging. The long, stocky, fusiform body plan is characteristic of many burrowing mammals.[1]
Evolution
Fossiomanus belongs to
Earlier tritylodontids, such as Kayentatherium, did not have the elongate body plan that characterized Fossiomanus. The evolution of an elongate body in Fossiomanus may have been the result of a change in the