Suminia is a genus of stem-mammal, in the clade Anomodontia, which lived 260 million years ago in the Late Permian ("zone II"). This anomodont was discovered in Kotelnich on the Vyatka River Russia. It is found in sandstone sediment, so most likely represents a delta-dwelling species, but this is not conclusive, as other habitats may have been involved but the species was never fossilized in that habitat. S. getmanovi has teeth that are heavily abraded, suggesting plant material of high silica content. Newer fossils indicate that it led an arboreal lifestyle. Suminia was relatively small, reaching about 20 inches in length. Suminia was originally described in 1994 based on only a skull, and a new Proceedings of the Royal Society B paper has stirred a great deal of media coverage due to the
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| - Suminia is a genus of stem-mammal, in the clade Anomodontia, which lived 260 million years ago in the Late Permian ("zone II"). This anomodont was discovered in Kotelnich on the Vyatka River Russia. It is found in sandstone sediment, so most likely represents a delta-dwelling species, but this is not conclusive, as other habitats may have been involved but the species was never fossilized in that habitat. S. getmanovi has teeth that are heavily abraded, suggesting plant material of high silica content. Newer fossils indicate that it led an arboreal lifestyle. Suminia was relatively small, reaching about 20 inches in length. Suminia was originally described in 1994 based on only a skull, and a new Proceedings of the Royal Society B paper has stirred a great deal of media coverage due to the
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- *S. getmanovi
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| - Suminia is a genus of stem-mammal, in the clade Anomodontia, which lived 260 million years ago in the Late Permian ("zone II"). This anomodont was discovered in Kotelnich on the Vyatka River Russia. It is found in sandstone sediment, so most likely represents a delta-dwelling species, but this is not conclusive, as other habitats may have been involved but the species was never fossilized in that habitat. S. getmanovi has teeth that are heavily abraded, suggesting plant material of high silica content. Newer fossils indicate that it led an arboreal lifestyle. Suminia was relatively small, reaching about 20 inches in length. Suminia was originally described in 1994 based on only a skull, and a new Proceedings of the Royal Society B paper has stirred a great deal of media coverage due to the discovery of new, better-preserved specimens studied by paleontologists Jorg Frobisch and Robert Reisz. Frobisch and Reisz determined that Suminia was probably an arboreal animal, and it is (so far) the earliest arboreal vertebrate known. The new Suminia material consists of a single block containing the articulated remains of over a dozen individual animals. The individuals on the slab appear to range from sub-adults to adults, and the preservation of the bones suggests rapid burial caused by some sort of minor catastrophe. The Permian deposits in which Suminia was found is relatively well-sampled. During the Late Permian, Suminia's local environment supported a large number of herbivores (about 83% of all the vertebrates present) and a much smaller number of carnivores (about 13% of all the vertebrates present). The authors hypothesize that it was competition with other herbivores that might have driven some synapsids into the trees. These plants would have been a resource unexploited by other vertebrates, and this may have allowed for the evolution of Suminia from more terrestrially-adapted ancestors.
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