Hagfish-Lamprey-Jawed Vertebrate Mystery
Started by
Guest_TomNear_*
, Sep 17 2009 09:10 AM
6 replies to this topic
#1 Guest_TomNear_*
Posted 17 September 2009 - 09:10 AM
Here is an essay recently published in Nature that profiles what is perhaps the most vexing problem in vertebrate phylogeny, the evolutionary relationships of hagfish, lamprey, and gnathostomes. I entered into the debate because students in my ichthyology class were not satisfied with the conflicting conclusions of the morphological and molecular studies, and I think were not impressed that I had no opinion to share as to which analysis may have greater weight. Anyway, I found this a well-written piece and will use it in my future teaching.
#4 Guest_AndrewAcropora_*
Posted 17 September 2009 - 08:48 PM
Neat! I'm anxious to see what exactly has been found. Guess I'll have to wait.
Here's a semi-distantly related article I dug up just yesterday for those interested.
Here's a semi-distantly related article I dug up just yesterday for those interested.
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Edited by AndrewAcropora, 17 September 2009 - 08:51 PM.
#5 Guest_TomNear_*
Posted 18 September 2009 - 06:14 AM
Andrew-This is a great paper. The importance of this paper for fish heads is that Andreolepis is again hypothesized as a stem osteichthian, and not a stem actinopterygian. Also, the phylogeny and the stratigraphy of the rocks bearing the fossils pushes the minimal age for the split between actinopterygians and sarcopterygians back to 419 Ma.Neat! I'm anxious to see what exactly has been found. Guess I'll have to wait.
Here's a semi-distantly related article I dug up just yesterday for those interested.
#6 Guest_kalawatseti_*
Posted 18 September 2009 - 02:09 PM
Here's a semi-distantly related article I dug up just yesterday for those interested.
This paper -- a description of the fossil Guiyu oneiros-- reminds me of something. The Catalog of Fishes database is a wonderful resource for the names of all Recent fishes. Is there an analogous site or resource for fossil fish taxa?
Thanks,
Chris
#7 Guest_daveneely_*
Posted 18 September 2009 - 05:33 PM
It's not as nicely compiled or as comprehensive as the Catalog, but the BFV is pretty useful.
http://www.vertpaleo...ibliography.cfm
http://www.vertpaleo...ibliography.cfm
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