17) Although, no information is available on the presence or absence of H19 in the monotremes
, it is highly likely that there is no H19 (and H19-DMR) in the platypus, because it was reported that IGF2 is biallelically expressed.
Of the 17 major groups of mammals, Australia has only five native groups: monotremes
, marsupials, bats, rodents, and seals.
There's no true generalisation to the effect, for instance, that once a person has PLATYPUS, further platypus-inputs will trigger MONOTREME
Mammal phylogeny - Mesozoic differentiation, multituberculates, monotremes
, early therians and marsupials.
The platypus belongs to a very small group of mammals called the monotremes
, a claustrum is absent altogether in the platypus, and whether it is present in echidnas is currently unresolved (Butler et al.
The configuration of these ear bones is similar in all three extant groups of mammals: the placental mammals, which bear live young, the pouched marsupials, and the egg-laying monotremes
, such as the duck-billed platypus.
Australasian Marsupial and Monotreme
Specialist Group, IUCN Species Survival Commission.
At the same time, the American Zoo and Aquarium Association's Marsupial and Monotreme
Taxon Advisory Group (AZA M & M TAG) recommended in its Regional Collection Plan (RCP) that the YFRW become a Species Survival Plan (SSP) species (AZA M & M TAG 2000).
Wacky Fact: The small monotreme
, when threatened, can dig a hole in soft soil with all fours at the same time while remaining completely horizontal
Australians call this egg-laying mammal, or monotreme
, the "Bits and Pieces Animal.
In all but the monotreme
mammals, procreation requires development of offspring within the female's reproductive tract; that is, pregnancy.