| Mcmurdodus | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Family: | †Mcmurdodontidae |
| Genus: | †Mcmurdodus White, 1968 |
| Species: | †M. featherensis |
| Binomial name | |
| †Mcmurdodus featherensis White, 1968 | |
Mcmurdodus is an extinctgenus ofchondrichthyan belonging to thefamilyMcmurdodontidae. It contains one species,Mcmurdodus featherensis, from theMiddle Devonian ofAntarctica. The Australian speciesM. whitei was previously included in the genus too, but was moved to a new genus,Maiseyodus, in 2021.[1]
Their teeth closely resemble those of modern sharks in the familiesHexanchidae andEchinorhinidae, and they were tentatively classified in theHexanchiformes when first described. However, more recent analyses indicate that they lack multiple layers ofenameloid on their tooth crowns, something present in all modern sharks and many sharks that coexisted withMcmurdodus. In addition, most divergence estimates for modern sharks are irreconcilable with the age ofMcmurdodus. For this reason, the Mcmurdontidae are now considered indeterminate chondrichthyans.[1][2][3][4]
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