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Ingenia and Citipati, and a Note on the Nakasato Museum Website



First, the note:

  The skeleton mounted of "Ingenia" at the dino-nakasato website is not 
*Ingenia*. It is vaguely
similar, and it is easy to confuse, but for a problem of the id of the sternum, 
the skull is that
of *Conchoraptor*, and is in fact the type specimen (GI 100/20) and the lower 
jaw (GI 100/21) is
reconstructed, and does not have such a deep lower margin. The skeleton is 
conchoraptorine, and
pertains to *Conchroraptor*, though I am uncertain of the specimen number. This 
material has
previously been referred to *Ingenia*, and this may be the source of the 
confusion on the website.
The sternum is an isolated specimen, GI 100/35 I beleive, which was referred to 
*Ingenia* by
Barsbold, 1983, based on differences from the sternum of the "super" 
oviraptorid, GI 100/42, now
suggested as belonging to *Citipati* as a new species and _not_ to *Oviraptor 
philoceratops*
(Clark et al., 2001).

  Okay, now for the diagnoses:

  *Ingenia yanshini* Barsbold, 1981 (Barsbold, 1983 in partim sensu Barsbold et 
al., 1990)

  The type includes a partial braincase of a "regular" oviraptorid skull 
(Headden, in prep) and a
partial postcranial skeleton. The original diagnosis is based on the manus, and 
in this there are
several distinctive and autapomorphic features unknown in _any_ dinosaur: the 
first manal digit is
longer than the second manal digit, and extends further distally than the 
second manal digit
(notice that length of a digit is based on all phalangeal lengths computed); 
first manal digit
larger relative to width than other manal digits; successively distal phalanges 
of second and
third digits smaller than proximal elements until unguals, which are larger 
than distal
non-ungualate phalanges. The remainder of the postcranial skeleton also appears 
to contain
autapomorphies, including a relatively proportionately shorter forelimb than 
hindlimb, much less
than 2/3 the hindlimb length; an ilium higher above the acetabulum than at any 
iliac ala; pubis
without any ventral curvature of the shaft, even just above the "boot;" broad 
angle divergence of
the proximal and distal ischiadic halves, where the angle of the short arms of 
the triangle is set
at the obturator process.

  *Citipati osmolskae* Clark, Norell, & Barsbold, 2001

  Only the type skull is adequately prepared to allow for a diagnosis to be 
rendered: the nsal
crest is short and the proximal face of the snout has a broad angle of 
divergence from the
horizontal long axis of the jugal; the external nares is broadly ovate, not 
slited at the rear;
the occiput is inclined rostrally at the dorsal extent, resulting in a 
relatively longer basal
length of the skull compared to the dorsal length, a sharp angle of the dorsal 
and rostral rami of
the quadratojugal, a nearly strait ventral margin between the rostral and 
vental rami of the
squamosal, and a dorsal ramus of the jugal at a perpendicular to the horizontal 
long axis, not
inclined caudally. The postcrania appears to have some autapomorphies as well, 
but this will need
to be thouroughly compared once a few other specimens are prepared and 
described. Thus, they are
not included.

  Hope this helps,

=====
Jaime A. Headden

  Little steps are often the hardest to take.  We are too used to making leaps 
in the face of adversity, that a simple skip is so hard to do.  We should all 
learn to walk soft, walk small, see the world around us rather than zoom by it.

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