Re: How old are the aroids?

**b* l* <l*@yahoo.com>**

Dear Pete and all,

Aloha.

Perhaps Dr. Ruth Stockey is lurking about on aroid-l...she and I have corresponded offline...we had a common connection with Betty 
Speirs, an amateur fossil researcher of a site called Joffre Bridge in Red Deer, Alberta.  Betty is no longer with us, but Ruth is in charge of her collections of fossils from Joffre Bridge.  I am sure you know Ruth and her husband,Dr. Gar Rothwell...and their publications on fossil Araceae, including Cobbania.

If we do not hear from her, I'll drop her a line and see if we cannot include her on this discussion.  She may be on summer vacation.  

Aloha,

Leland

--- On Tue, 8/5/08, Peter Boyce <botanist@malesiana.com> wrote:

> From: Peter Boyce <botanist@malesiana.com>
> Subject: Re: [Aroid-l] How old are the aroids?
> To: "Discussion of aroids" <aroid-l@gizmoworks.com>
> Date: Tuesday, August 5, 2008, 7:51 PM
> Not alone, but with the addition of external data from
> modern distributions, molecular work and subsequent mapping,
> plus time line molecular work we can begin to get a handle
> on the family origin. The one thing that is irrefutable is
> that the aroids are at least early Cretaceous.
> 
> I was hoping that this thread would ellicit more responses
> on aroid-l than it has!
> 
> Peter
>   ----- Original Message ----- 
>   From: Christopher Rogers 
>   To: 'Discussion of aroids' 
>   Sent: Tuesday, August 05, 2008 11:53 PM
>   Subject: Re: [Aroid-l] How old are the aroids?
> 
> 
>   Thanks, Peter!
> 
>    
> 
>   Is that sufficient to establish a molecular “clock”?
> 
>    
> 
>    
> 
>   D. Christopher Rogers
> 
>   Senior Invertebrate Ecologist/ Taxonomist
> 
>   ((,///////////=======<
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>   EcoAnalysts, Inc.
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>   From: aroid-l-bounces@gizmoworks.com
> [aroid-l-bounces@gizmoworks.com] On Behalf Of Peter
> Boyce
>   Sent: Wednesday, July 30, 2008 11:55 PM
>   To: Discussion of aroids
>   Subject: Re: [Aroid-l] How old are the aroids?
> 
>    
> 
>   Hi Christopher,
> 
>    
> 
>   The 'best fit' for this is the Lasoideae with
> Anaphllopsis on the Guiana Shield, Lasimorpha in West Africa
> Anaphyllum in S. India
> 
>    
> 
>   very best
> 
>    
> 
>   Peter
> 
>     ----- Original Message ----- 
> 
>     From: Christopher Rogers 
> 
>     To: 'Discussion of aroids' 
> 
>     Sent: Thursday, July 31, 2008 1:37 AM
> 
>     Subject: [Aroid-l] How old are the aroids?
> 
>      
> 
>     Hello Peter and Sin Yeng,
> 
>      
> 
>     I understand your difficulties! I wrote a paper a few
> years ago revising a genus of freshwater shrimp. There are
> three species in the genus, all found in rain pools on a
> very specific geomorphic surface: one species in North
> America, one in South America, and one in Europe and north
> Africa. The geomorphic settings are all very old, and at one
> time before continental drift, were all near each other at
> the equator. Using this I could estimate the age of the
> genus. So here is my question: are any “primitive” aroid
> taxa limited to certain geomorphic features that can be
> traced through history? It may give you a means of
> estimating evolution rates for some higher taxa levels.
> 
>      
> 
>     Grins,
> 
>     Christopher
> 
>      
> 
>      
> 
>     D. Christopher Rogers
> 
>     Senior Invertebrate Ecologist/ Taxonomist
> 
>     ((,///////////=======<
> 
>      
> 
>     EcoAnalysts, Inc.
> 
>     1.530.756.4481
> 
>     1.530. 383.4798 (cell)
> 
>     1307 "L" Street
> 
>     Davis, CA 95616
> 
>     USA
> 
>      
> 
>     Invertebrate Taxonomy
> 
>     Endangered Species
> 
>     Ecological Studies
> 
>     Bioassessment
> 
>     Invasive Species
> 
>     Plankton
> 
>     Phycology
> 
>      
> 
>     Moscow, Idaho  Bozeman, Montana  Davis, California 
> Joplin, Missouri
> 
>     Selinsgrove, Pennsylvania
> 
>     ecoanalysts.com
> 
>      
> 
> 
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