hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: How old are the aroids?

  • Subject: Re: How old are the aroids?
  • From: brian lee <lbmkjm@yahoo.com>
  • Date: Thu, 31 Jul 2008 10:22:42 -0700 (PDT)

Dear Christopher and all,


Wow. There must have been some sort of refugia all that time to preserve your geomorphic features for the habitat of your shrimp.  I would assume that is rare.  What is the geologic history of the sedimentation or other processes of the region?  Are we talking about Anostracan crustacea?  I know you wrote a paper on fairy shrimp in Minas Gerais...could you resend me the pdf off forum?...I seem to have lost that to virtual world.  Anostracans have a geologic history from the Lower Devonian, according to my Treatise on Invertebrate Paleontology.  I do not recall the age of your geomorphic features...could you refresh my poor memory? I am most familiar with the Santana formation fossils of the Late Cretaceous of Brazil...when shallow seas or lacustrine environments existed....and the connection to African fossils of similar age are proven.  I am assuming your geomorphic features predate that....perhaps by a significant period.

This is a very interesting point you bring up regarding tectonic movements and botanical evolutionary trends.  Are there many references on the biogeography of the aroids?  



--- On Wed, 7/30/08, Christopher Rogers <crogers@ecoanalysts.com> wrote:

> From: Christopher Rogers <crogers@ecoanalysts.com>
> Subject: [Aroid-l]  How old are the aroids?
> To: "'Discussion of aroids'" <aroid-l@gizmoworks.com>
> Date: Wednesday, July 30, 2008, 7:37 AM
> 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
> ŸInvertebrate Taxonomy
> ŸEndangered Species
> ŸEcological Studies
> ŸBioassessment
> ŸInvasive Species
> ŸPlankton
> ŸPhycology
> Moscow, Idaho Ÿ Bozeman, Montana Ÿ Davis, California Ÿ
> Joplin, Missouri
> Selinsgrove, Pennsylvania
> ecoanalysts.com_______________________________________________
> Aroid-L mailing list
> Aroid-L@www.gizmoworks.com
> http://www.gizmoworks.com/mailman/listinfo/aroid-l

Aroid-L mailing list

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement