monotreme


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to monotreme: placental mammal

mon·o·treme

(mon'ō-trēm),
A member of the order Monotremata.

monotreme

(mŏn′ə-trēm′)
n.
Any of various egg-laying mammals of the order Monotremata of Australia and New Guinea, whose only living members are the platypus and the echidnas.

mon′o·trem′a·tous (-trĕm′ə-təs) adj.

monotreme

any mammal of the primitive subclass Monotremata, including the duck-billed platypus and spiny anteater. Monotremes differ from other mammals in laying eggs, and in having a single opening (CLOACA) for the passage of eggs or sperm, faeces and urine. They inhabit Australia and New Guinea.
References in periodicals archive ?
(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 [39].
Among monotremes, 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."