Gasosaurus/Szechuanosaurus and Hesperornis

[gmbra@it.net.au]

I've just finished reading the translation (via The Polyglot 
Paleontologist) of Gao's 1998 description of Szechuanosaurus zigongensis. 
It starts off by mentioning a partial skeleton discovered at Zigong and 
INITIALLY (capitals are mine) described as Gasosaurus constructus by Dong 
and Tang in 1985. It then says "...an appended description is hereby 
conducted.", and goes on to describe S. zigongensis. Unless I'm badly 
mis-reading it, Gasosaurus is sunk into Szechuanosaurus?? , which I wasn't 
aware had happened. Can anyone confirm this? The specimens are IVPP V9011, 
9012, 9013 and 9014, but I have not been able to track down the catalogue 
numbers for the Gasosaurus specimens to see if they are the same.
Second query concerns a Field Museum specimen (PA 316) listed as 
Hesperornis gregaries. I have a number of Hesperornis species but have 
never seen this one before. Anyone know anything about this?
Thanks
Graeme Worth