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Re: number of species of dinos



In a message dated 95-10-05 16:06:05 EDT, swf@ElSegundoCA.ATTGIS.COM (Stan
Friesen) writes:

>My dino list used to have about 400 *genera* in it.  Most of these
>are nomina dubia, which leaves about 100-150 valid genera. At an
>average of about 1.5 species per genus (generous), this gives about
>150-200 described species.

Many nomina dubia are based on material that is clearly distinct from other
dinosaur material but nevertheless insufficient to diagnose a genus or
species. How one counts these mustbe determined on a case-by-case basis; they
should not be dismissed out of hand.