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Dinosaur Genera List corrections #69



The Detroit Free Press recently requested me to distill my archosaurian taxa
tables to extract a complete list of dinosaur species that they could publish
for a children's feature on dinosaurs. In the course of doing this, I
discovered a few changes, mainly cosmetic, required for the Dinosaur Genera
List. These include:

(1) Asterisk _Albisaurus_, which is based on indeterminate material that is
probably not dinosaurian:

Albisaurus Fritsch, 1905*

(2) Return the listing of _Chaoyangosaurus_ to its original spelling and
author. Paul Sereno (pers. comm.) notes that this genus has not yet been
formally described, and that Dong's 1992 citation of a _Chaoyangosaurus_
paper by Zhao & Cheng, 1983 seems to refer to an unpublished reference.
Accordingly, the entry should read as follows:

Chaoyoungosaurus Zhao, 1983 [nomen nudum]

(3) Certain workers in thecodontians seem to agree (various pers. comms.)
that _Shuvosaurus_, described as a Triassic ornithomimid, is non-dinosaurian
and may be related to the archosaurs _Lotosaurus_ or _Chatterjeea_. (See,
e.g., Long & Murry 1995.) Accordingly, that name should be asterisked as
non-dinosaurian in the listing:

Shuvosaurus Chatterjee, 1993*

(4) Dinosaur list member Bob Tuck notes the May issue of _Discover_ carries a
news item (p. 22) on the Arizona brachiosaurid informally called
_Sonorasaurus_. A species epithet is provided for the genus for the first
time ( _Sonorasaurus thompsoni_), as well as the alternative name
_Chihuahuasaurus_, stated to have been a preliminary choice of name for this
genus by worker Ronald Ratkevich. Thus we may remove the quotation marks from
"Sonorasaurus" and add name #803 to the list:

Chihuahuasaurus Ratkevich vide [Anonymous] 1997 [nomen nudum]

Sonorasaurus [Anonymous] 1995 [nomen nudum]

If the dating of the specimen is correct (100 Ma), _Sonorasaurus_ may be one
of the last North American sauropods to exist before the celebrated North
American "sauropod hiatus" of the Late Cretaceous, and it also seems to be
the latest known undoubted brachiosaurid (skull is present) from anywhere.
The specimen was initially taken to be a large, early hadrosaur.