Platypus

... vague hint about convergetnt evolution in regards to my previos explanation. 4. So it is some relict and small group. Others parts hint us towards Platypus since it has eggs but produce milk, and males has poisonous spine on hind legs, and has some weird mixed aperiance of duck, otter and beaver. ...

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... it's a monotreme of some sort. edit: the description also says "mixed up appearance" though, which, like mith said, makes me think "platypus".

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spine is probably platypus though

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mammary glands in male human beings r said to be vestigial because they r functional in male prototherians{1st class in mammalia} like duck billed platypus and ecidna.they exhibt phenomenon called gyanaecomasticism

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Are we talking about the Duck-billed Platypus ( Ornithorhynchus anatinus ) here, or something entirely different? Not trying to be rude or anything but I believe there is only one type of platypus, Ornithorhynchs anatinus.

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