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The bones were the disarticulated remains of bears, deer, mice, and a kind of eastern wood rat not currently found in the area of the fossil discovery. [17] More recently, in 1989, the Pennsylvanian sea lily, Delocrinus missouriensis, was designated the Missouri state fossil. In 2004, Hypsibema missouriensis was designated the state dinosaur ...
Ornithorhynchoidea is a superfamily of mammals containing the only living monotremes, the platypus and the echidnas, as well as their closest fossil relatives, to the exclusion of more primitive fossil monotremes of uncertain affinity.
This list of the Paleozoic life of Missouri contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Missouri and are between 538.8 and 252.17 million years of age. There is no Permian age rocks on the surface in Missouri, so beware of any fossils identified as such in the state.
It has been theorized that the loss of teeth in the platypus was a geologically recent event, occurring only in the Pleistocene (after over 95 million years of tooth presence in the ornithorhynchid lineage) after the migration of the rakali (Hydromys chrysogaster), a large semiaquatic rodent, to Australia. Competition between the rakali and ...
A critically-endangered echidna named after Sir David Attenborough has been captured on film for the first time more than 60 years after it was last recorded. The Attenborough's long-beaked ...
Opalios was nicknamed "echidnapus" (a portmanteau of "echidna" and "platypus") in the press following its description due to the specimen's similarities to both extant monotreme lineages. [ 2 ] Several other monotremes are known from the Griman Creek Formation, including Dharragarra and Parvopalus —which were described in the same publication ...
Attenborough’s long-beaked echidna, which was thought to be extinct, has stunned scientists after being filmed in a tropical forest in Indonesia for the first time.. The egg-laying mammal, named ...
Fossil of the Middle-Late Ordovician giant trilobite Isotelus. †Isotelus †Isotelus gigas †Isotelus maximus †Jeffersonia †Kendallina †Kirengella †Kirkella – type locality for genus †Lepidophyllum †Lingula †Liroceras †Matthevia †Maximites †Meristella †Meristina †Metacoceras †Murchisonia – tentative report