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Judith, It must be: Cockerell, T. D. A. 1919. Some American Cretaceous fish scales. U.S. Geol. Surv. Prof. Paper 120: 165-188. Kenshu >>> harrisj@cvn.com 10/19/01 21:07 PM >>> There is an old U.S.G.S. Professional Paper by Theodore Cockerell that is entirely devoted to identifying Cretaceous fish scales. Sorry I cant remember the date but early part of 20th century. Maybe somebody else can add to these details. Judith -----Original Message----- From: paleonet-owner@nhm.ac.uk [mailto:paleonet-owner@nhm.ac.uk]On Behalf Of James Mahaffy Sent: Friday, October 19, 2001 3:45 PM To: paleonet@nhm.ac.uk Subject: paleonet Cretaceous fish in NW Iowa This message never appeared on paleonet but since paleonet seems to be working now, here is a retry. Actually I think I had a word in the subject line of my message that made the software think I was sending a message to the software and not the list. In any case here is a retry. Folks, This past summer I was involved in uncovering a big icthyodectid fish from the softer clay/mud in the Greenhorn formation (Bridge Creek Member) here in NW Iowa. Then a couple week ago, I was leading a field trip to local Cretaceous outcrops and one of the members found a large scale. I assume it also belongs to an icthyodectid. Two questions. 1. Can we identify the scale (see url: http://homepages.dordt.edu/~mahaffy/paleo/fish/fishscale.html) any further than icthyodectid? 2. When the collector (a former paleontology student of mine) and I get the big fish uncovered (it is articulated but may be a bit messed up by predation), which are the best keys to look at to identify the fish? Also are there some good Cretaceous fish experts that I could go to check ID? The reason for my asking is I amtrained more as Pennsylvanian palynologist than a vertebrate paleontologist and just don't know the Cretaceous fish workers. Since Dordt is smaller I teach paleontology and it was fun getting out the big skeleton. Depending on what it is, I am told by one of our state geologists that it may be a significant find. I have a copy of John Chorn and Gloria Arratia's article in vertebrate palenotology (1998) of a fish from the Greenhorn. James Mahaffy (mahaffy@dordt.edu) Phone: 712 722-6279 Biology Department FAX : 712 722-1198 Dordt College, Sioux Center IA 51250
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