Search results
Results From The WOW.Com Content Network
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 ...
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.
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.
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 ...
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.
Yinotheria is a proposed basal subclass clade of crown mammals uniting the Shuotheriidae, an extinct group of mammals from the Jurassic of Eurasia, with Australosphenida, a group of mammals known from the Jurassic to Cretaceous of Gondwana, which possibly include living monotremes. [3]
Spades is all about bids, blinds and bags. Play Spades for free on Games.com alone or with a friend in this four player trick taking classic.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more