monotreme

How To Use monotreme In A Sentence

• 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
• Placental and marsupial mammals are more closely related to one another than to the third living group of mammals, the monotremes.
• The Australian fossil record of monotremes also includes some quite good Miocene and Pleistocene fossils of giant echidnas.
• all mammals except monotremes and marsupials are placental mammals
• In some ways, monotremes are very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth.
• Placental and marsupial mammals are more closely related to one another than to the third living group of mammals, the monotremes.
• Many of the comprehensive, algorithm-based analyses place multituberculates within the crown group of living mammals, in some cases tentatively united with monotremes.
• 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
• 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.
• Triconodonts, monotremes and multituberculates have the primitive condylar arrangement for the radius.