(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.
Australia has some of the strangest animals on Earth It is the only continent to have all three groups of mammals - placentals, marsupials, and monotremes
. Mammals are the animals we are most familiar with.
There's no true generalisation to the effect, for instance, that once a person has PLATYPUS, further platypus-inputs will trigger MONOTREME
. There were, after all, plenty of native Australians who saw plenty of platypuses without acquiring MONOTREME
Mammal phylogeny - Mesozoic differentiation, multituberculates, monotremes
, early therians and marsupials.
We found that this region including chloride channel protein 5 (clcn5) is highly conserved in X1 chromosomes of mammalian monotremes
such as platypus and also in the PAR region of the X chromosome of therian mammals, indicating a previously unrecognized evolutionary link from fish to mammals .
, a claustrum is absent altogether in the platypus, and whether it is present in echidnas is currently unresolved (Butler et al., 2002; Ashwell et al., 2004).
While Geering (1983:table 5) recorded a single monotreme
bone (platypus, Ornithorhynchus anatinus) from between spits A10NW to A14, neither this nor the echidna (Tachyglossus aculeatus) was identified during this study.
It also implies that today's monotreme
descendants of T.
Maxwell S, Burbidge AA, Morris K (1996) Action Plan for Austraq Marsupials and Monotremes
. 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."