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RICHARDOESTESIA ?POSTCRANIA, NEW JUNGORNITHID
Sorry Luis, I ended up spending yesterday at the zoo.
Re: _Richardoestesia gilmorei_, I am reliably informed that
there is undescribed postcranial material at the Tyrrell that
may be referable to this taxon. Apparently this material
suggests that _Richardoestesia_ is a compsognathid-grade
coelurosaur, and not much to do with maniraptorans. I will
ask my source if they can provide more info.
BTW, has anyone yet asked Phil Currie which spelling of
_Richardoestesia_ he presently goes along with? Not to
start that thread again, but this was a question that came up
last time and was never answered.
Moving on, the following is out..
Mayr, G. 2003. A new Eocene swift-like bird with a
peculiar feathering. _Ibis_ 145, 382-391.
The new Messel taxon _Parargornis messelensis_ is
described and tentatively assigned to the jungornithids.
While _P. messelensis_ shares with _Jungornis_ and
_Argornis_ the derived presence of a pronounced ventro-
proximal ridge on the ventral cotyle of the proximal ulna
seen in trochilids, _P. messelensis_ lacks the several
humeral characters noted by Karhu (1999) as common to
jungornithids and trochilids. Jungornithidae is therefore
probably paraphyletic, with _Jungornis_ and _Argornis_
closer to trochilids than is _Parargornis_.
Not only does _P. messelensis_ provide further evidence for
derivation of trochilids from ancestors with broad, swift-
like bills (don't forget that Mayr (2002) found aegothelids to
be the sister-taxon to the swift-trochilid clade), the
feathering preserved shows that _P. messelensis_ had short,
broad wings and two long, broad symmetrical tail feathers.
It is unlikely therefore that _P. messelensis_ was a glider or
at all trochilid-like: it may have been an agile flier in
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