Many thanks to all who have replied to my request of 14 October!
My request read: "I should be very grateful to learn who coined / was the
first to use in print the phrase "taxonomist's nightmare - evolutionist's
delight"."

Here is how I see the situation now, based on the replies:
MACINTYRE (1967) was the first to use the phrase in print but it was also
attributed to Arthur J. Cain (UZZELL & ASHMOLE 1970) and used, in plural
form and apparently independently, by WOODRUFF (1978).
MACINTYRE, G.T. (1967): Foramen pseudovale and quasi-mammals. - Evolution
21: 834-841.
UZZELL, T. & N.P. ASHMOLE (1970): Suture-zones - an alternative view. -
Systematic Zoology 19: 197-199.
WOODRUFF, D.S. (1978): Review: mechanisms of speciation. - Science 199:
1329-1330.

Please find the compiled replies below.

Warmest,
Florian
Florian M. Steiner
Molecular Ecology Group, Institute of Ecology University of Innsbruck, 
Technikerstr. 25, A-6020 Innsbruck, Austria Phone ++43-512-507-6120, 
Fax ++43-512-507-6190 
http://www.uibk.ac.at/ecology/forschung/molecular_ecology.html

Compiled replies in the order received:
###
Google retrieved this article by McIntyre.
http://www.jstor.org/pss/2406777
Hope thats what you're looking for.
Vikram

###
I used it in the 1970's but I'm traveling between Bangkok and San Francisco
today so it will be a day or two before I can check my date. I used in
connection with hybrid zones and species definitions perhaps in the context
of the land snail Cerion. I don't think I ever claimed to have coined the
phrase.  
To be continued
David

###
I'm afraid that I don't know, but if you do find out who it was, I would
appreciate your letting me know as well!
Thanks,
Melissa

###
I believe it was A.J. Cain.  See: 
Thomas Uzzell and N. Philip Ashmore.  Suture-Zones: An Alternative View 
Syst Biol (1970) 19(2): 197-199 doi:10.2307/2412459

###
The phrase (which refers to clines) comes from a review of John Endler's
1977 book by David Woodruff (1978. Review: Mechanisms of Speciation. Science
199: 1329-1330.) Erik

###
Google's your friend.
Thomas Uzzell and N. Philip Ashmole (Systematic Zoology Vol. 19, No. 2,
Jun., 1970) attributed it to A.J. Cain.

###
Hello,
I don't know if this is the right paper.  I did a quick google search gave
me this paper from 1967. (see attached)
Foramen Pseudovale and Quasi-Mammals
www.jstor.org/stable/2406777
by GT MacIntyre - 1967 - Cited by 31 - Related articles
a taxonomist's nightmare when compared to the classic categories of Reptilia
and. Mammalia. Contrariwise, they are an evolutionist's delight because they
have ..
Sheila

###
Check this out. It appears to be attributed to A.J. Cain.
Best, Paul

###
It sounds like A. J. Cain (of Cain and Sheppard). If you go to an old paper
in Systematic Zoology, vol. 19, No. 2, June 1970, the Points of View
section, you will find a short comm by Uzzell and Ashmole, in which they
point out that A. J. Cain once told them that "the taxonomist's nightmare is
the evolutionist's delight."  This may lead to the answer.

###
Woodruff DS 1978. Mechanisms of speciation. Science 199: 1329-1330. [last
sentence]
I subsequently used a paraphrase in the Abstract of a 1980 paper on the land
snail Cerion [Biol J Linn Soc]
Macintyre's usage was spead out over two sentences on [p. 835] and was
unknown to me.  
David

###

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