How To Use Monotreme In A Sentence
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Descriptions of the skull and non-vestigial dentition of a Miocene platypus (Obdurodon dicksoni n. sp.) from Riversleigh, Australia, and the problem of monotreme origins.
Australian Fossil Mammal Sites, Australia
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Placental and marsupial mammals are more closely related to one another than to the third living group of mammals, the monotremes.
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The Australian fossil record of monotremes also includes some quite good Miocene and Pleistocene fossils of giant echidnas.
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all mammals except monotremes and marsupials are placental mammals
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In some ways, monotremes are very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth.
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Placental and marsupial mammals are more closely related to one another than to the third living group of mammals, the monotremes.
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Many of the comprehensive, algorithm-based analyses place multituberculates within the crown group of living mammals, in some cases tentatively united with monotremes.
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Lemuroid and the higher forms of primates; for those between the original primate and other root-forms of placental mammals; for those between primary placental and implacental mammals, and perhaps also for the divergence of the most ancient stock of these and of the monotremes, for in all these cases modifications of structure appear to increase in complexity in at least that ratio.
On the Genesis of Species
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Molecular evidence now suggests that the marsupials and the monotremes branched off much earlier than the placentals did and that they are therefore the closer relatives.
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Triconodonts, monotremes and multituberculates have the primitive condylar arrangement for the radius.
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A 15 million-year-old complete skull and nearly complete dentition of the monotreme Obdurodon dicksoni has already provided a great deal of new information about this highly distinctive group of mammals.
Australian Fossil Mammal Sites, Australia
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The duckbill platypus is a current member of the ancient monotreme group.
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Modern monotremes lack teeth as adults; sutures are hard to see; the rostrum is elongate, beak-like, and covered by a leathery sheath; and lacrimal bones are absent.
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Like the eggs of birds, monotreme eggs are incubated and hatched outside the body of the mother.
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If moving from monotreme dreams to 'treme genes leaves you hungry for more information on Ornithorhynchus anatinus, reread this old Jurisdynamics post, Monotremata. posted by Jim Chen at 1:46 AM
Archive 2008-05-01
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The platypus and the echidna - a nocturnal, burrowing mammal with a spiny coat, long claws, and no teeth - are the only known living members of a type of animal known as monotremes.
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monotremes and marsupials are aplacental mammals
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There are only three living monotremes, the duck-billed platypus and two species of echidna, or ‘spiny anteaters’, such as the one shown at right.
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Monotremes defy the English word mammal, which implies breasts, or at least nipples.
Archive 2006-09-01
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To distinguish them from the marsupials and the placental mammals the monotremes are placed in their own class, the prototheria.
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The only living monotremes are the platypuses and the echidnas.
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The word monotreme combines the Greek words, μονο and τρεμα, for one and hole.
Archive 2006-09-01
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No, the label monotreme refers to the order of mammals which lay eggs.
Digg.com: Stories / Popular
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June 4, 2008 at 11:54 am iz nawt mammul. iz….sumfin elze. big wurd. monotreme? sumfin liek dat.
Oh mai! - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?
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However, the bone is rather persistent otherwise, and has been identified, for example, in tritylodontids, Morganucodon, Gobiconodon, and monotremes, although it is absent in multituberculates.
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But in the monotremes the formation of the cenogenetic entoderm does not precede the invagination; hence in this case the construction of the germinal layers is less modified than in the other amniota.
The Evolution of Man — Volume 1
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We are familiar with the monotremes, marsupials and placentals of today, but there were also other kinds, such as multituberculates, which are now extinct.
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But the monotremes probably split away from this main line of evolution early on, in the late Jurassic or early Cretaceous.
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An unquestioned monotreme, Steropodon has molars that are surprisingly similar to those of marsupials and placentals, suggesting a closer relationship to living therians than had generally been thought.
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Like the eggs of birds, monotreme eggs are incubated and hatched outside the body of the mother.
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But what the newly sequenced genome reveals is that the platypus's male-determining gene, the monotreme equivalent of primates' SRY gene, is not located on any of those five pairs of sex chromosomes.
Archive 2008-05-01
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The platypus and the echidna - a nocturnal, burrowing mammal with a spiny coat, long claws, and no teeth - are the only known living members of a type of animal known as monotremes.