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From: rh@smds.UUCP (Richard Harter)
Newsgroups: sci.bio
Subject: Re: What's a monotreme?
Summary: Mammalian bones
Keywords: monotremes
Message-ID: <416@smds.UUCP>
Date: 24 Apr 91 21:56:29 GMT
References: <1991Apr22.111159.29888@kuhub.cc.ukans.edu> <4896@kitty.UUCP> <209@tdatirv.UUCP>
Organization: SMDS Inc., Concord, MA
Lines: 16

In article <209@tdatirv.UUCP>, sarima@tdatirv.UUCP (Stanley Friesen) writes:

	A good article about momotremes continues

> In fact they are mammals only in possesing milk (i.e. mammary glands),
> insulating hair, and (to some degree) endothermy.

Bones.  They have mammalian jaws.  The inimitable Dr. Asimov argues in one
of his columns that the fusion of the relevant bones in Platypus is not
completed until after birth and the correct classification of Platypus
is a Therapsid and not a mammal at all.
-- 
Richard Harter, Software Maintenance and Development Systems, Inc.
Net address: jjmhome!smds!rh Phone: 508-369-7398 
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