Re: Not dinosaurs but chondrichthyans

[soto@adinet.com.uy]

Patty Ralrick wrote:

>the oldest shark I could find was *Hybodus* who was known
>from the Devonian.  

Since you are mentioning *Hybodus*... AFAIK, the oldest hybodontiform 
chondrichthyans
are Devonian-Carboniferous: *Onychoselache*, *Tristychius* and 
*Hamiltonichthys*,
and some isolated scales referred to as *Arauzia*. But of course, there
are non hybodontiform sharks that are older.
Back to dinosaurs :-)

Matías Soto

>Date: Thu, 22 Apr 2004 03:13:14 +0000
>Reply-To: pattyralrick@hotmail.com
>From: "Patty Ralrick" <pattyralrick@hotmail.com>
>To: Lorna.Steel@iow.gov.uk, dinosaur@usc.edu
>Subject: Re: Not dinosaurs but chondrichthyans
>
>
>Hi Lorna,
>
>I recently co-wrote a chondrichthyan guide to Dinosaur Provincial Park
in
>
>Alberta, Canada with Dr. Don Brinkman of the Royal Tyrrell Museum.  After
>an 
>extensive search the oldest shark I could find was *Hybodus* who was known
>
>from the Devonian.  Sorry.  Wish I could give you an older one, but there
>
>doesn't seem to be any known yet.
>
>Good luck on your display!
>
>Patty
>**********************************************************
>"Dream as if you'll live forever.  Live as if you'll die today"
>James Dean
>
>Patty Ralrick
>Bellevue, NE  USA
>
>Lorna wrote:
>
>Hi all,
>
>Is anyone out there up to date with the earliest appearance of
>chondrichthyans? It's Devonian according to the latest edition of Benton's
>Vertebrate Palaeontology, but surely there have recent finds to push that
>back a little earlier. Shark people, please tell me what you know! It's
for
>a museum display.
>Lorna
>
>Lorna Steel
>Dinosaur Isle
>culver parade
>sandown
>isle of wight
>po36 8qa
>01983 404344
>
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