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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 contrasts with the modern platypus, where adults are entirely toothless. 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 ...
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 ...
Dharragarra is one of the oldest members of the platypus and echidna lineage, being closer to them than the coeval ornithorhynchoid Opalios.Due to the close resemblance of its jaw to that of a platypus, Dharragarra is considered one of the oldest members of the platypus stem lineage, although it likely predates the divergence of platypuses and echidnas.
The New England Patriots fired head coach Jerod Mayo on Sunday, announcing the move just after team’s final game and leaving the Patriots searching for a new head coach for the second time in ...
Donald Trump mocked Canadian Prime Minister Justin Trudeau after his top minister’s surprise resignation following a clash on how to handle the president-elect’s looming tariffs.
The echidna spurs are vestigial and have no known function, while the platypus spurs contain venom. [42] Molecular data show that the main component of platypus venom emerged before the divergence of platypus and echidnas, suggesting that the most recent common ancestor of these taxa was also possibly a venomous monotreme.
The commission's recommendation comes as doctors and consumers flock to a popular class of weight-loss drugs called glucagon-like peptide 1 (GLP-1) to treat obesity, type 2 diabetes, heart disease ...