The obvious reason for the "left handed " fossil conus is that the early
cone builders had the blueprints reversed. rumor has it that the team of
builders are working feverishly on the busycon contrarium, but don't hold
you breath. M,FKAF
-----Original Message-----
From: Ross Mayhew <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Thursday, January 14, 1999 3:34 PM
Subject: Sinistral cone species: when did they vanish??
 
 
>One of the mysteries of fossil vs recent cones, is that many fossil
>cones are sinistral, while NONE of the modern species are (unless i have
>missed something?).  Can anyone tell me when the left-handed cone
>species died out, and whether this was a sudden or a gradual process?
>Any speculations Why???
>
>A Curious Canuck,
>
>Ross M.
>