Re: _Holbotia_

["Timothy Williams" <twilliams_alpha@hotmail.com>]

A few weeks ago I sent a vague and probably not very helpful posting about a 
"new" bird from Mongolia - actually a not-so-new pterosaur re-classified as 
a bird.  This is _Holbotia ponomarenkoi_, from the Unduruhinskaya Formation 
of Mongolia, the same formation as _Ambiortus dementjevi_.  I've finally 
managed to track down some more details.

The authority on this is:

Unwin, D.M. (1993), Chapter 40. Aves.  In Benton, M.J. (Ed.). The Fossil 
Record 2, p.717-738.  Chapman and Hall, NY.

He writes, in the entry for _Ambiortus dementjevi_: "Further remains from 
the same formation at Holbutu, also in the Bajan-Khongor aimak, currently 
referred to as "_Holbotia ponomarenkoi_" and thought to be a pterosaur 
(Kurochkin, 1991), probably belong in the Ambiortidae, and possibly to 
_Ambiortus_" p.718

The reference mentioned is:

Kurochkin, E.N. (1991),  _Protoavis_, _Ambiortus_, and other 
palaeornithological rarities.  Priroda 1991(12): 45-53 [In Russian].

I've never heard of this journal, nor the paper ever before.  _Holbotia 
ponomarenkoi_ may be a nomen nudum.

If anybody out there is able to find out anything more, I'd be very 
appreviative.


Tim

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