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Re: Birds of Russia and Mongolia
(Thanks for the info Mickey!)
His phylogeny of enantiornithines is hard to decipher. He seems to >have
two orders- the Alexornithiformes and Euornithiformes. The >former
includes the Alexornithidae (Alexornis, Gobipteryx, >Kizylkumavis,
Lenesornis, Nanantius, Neuquenornis, Sazavis, >Zhyraornis), Avisauridae
(Avisaurus, Enantiornis, Soroavisaurus) and >Enantiornithidae (Gurilynia).
I enjoy reading Kurochkin's descriptions of Mesozoic birds, but I find his
taxonomy downright perplexing. An Enantiornithidae without _Enantiornis_?
And I don't know what the story is behind
"Euornithiformes", but Kurochkin has used it a lot.
The diagnoses for the groups are fairly extensive, although nearly all
>taxa are too fragmentary to be assigned to a group based on more than
...and the description of _Apsaravis_ may put a new spin on many of these
Ambiortus Kurochkin 1982
A. dementjevi Kurochkin 1982
Holotype- (PIN 3790-271, PIN 3790-272) cervical vertebrae, scapula,
>coracoid, partial sternum, furcular ends, proximal humerus, partial
>radius, partial ulna, carpometacarpus, phalanx II-1, phalanx II-2,
>manual ungual II
Comments- The heterocoelous cervicals and normal scapulocoracoid
>articulation place this species in the Euornithes. The flattened >manual
phalanx II-1 shows it is ornithurine.
When Kurochkin says "phalanx II-1", does he mean the middle digit or the
innermost digit of the tridactyl manus? Is it digit II of I-II-III from the
ancestral pentadactyl condition (as dinosaur experts interpret the avian
tridactyl manus), or digit II of II-III-IV (as ornithologists prefer)?
Timothy J. Williams
Iowa State University
Ames IA 50014
Phone: 515 294 9233
Fax: 515 294 3163
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