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RE: Discovery frequency

I believe the "frequency statistics" originated with Peter Dodson as a
result of the research he and Osmolska and Weishampel did on the first
edition of The Dinosauria (circa 1989).  When we both were with The Dinosaur
Society, this figure was frequently used. Peter and I co-authored a paper in
1996(?) on the number of valid dinosaur genera, adding to the stats from the
original Dinosauria, and re-confirming a frequency of discovery of about 7
or 8 new dinosaurs named (published) each year from 1990 to 1995. This can
also be viewed as about 1 new dinosaur every 7 weeks, although the basis for
the stat is really the number of new dinosaur genera published each year in
peer-reviewed journals that consisted of more than fragmentary material. Our
criteria for "valid" genera created a total list of currently accepted
dinosaur genera of about 325 at that time. My impression is that this rate
of discovery has continued since 1995. The number is up around 350 or so
now. I can provide a ref and more detail on our criteria if anyone would
like it.

--Thom Holmes
dinosaur author at large

-----Original Message-----
From: gmbra@cygnus.uwa.edu.au [mailto:gmbra@cygnus.uwa.edu.au]
Sent: Tuesday, November 30, 1999 5:36 PM
To: Hitt@aol.com
Cc: dinosaur@usc.edu
Subject: Discovery frequency

>I recently read an old reference  that said, "Every seven weeks a new kind
>dinosaur is named." Can anyone tell me how to determine what that rate
>be now, say, in the last two to five years?

According to the stats in my Dinosaur Encyclopaedia software, for the
period 1991-95, 88 new dinosaur species were named (~1 every 3 weeks), and
for 1996 to the middle of 99, 60 new species (~1 every 3 weeks again).
Hope this helps
Graeme Worth