DevonianFishes
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More results have been published recently on the braincase of this shark, by Maisey et al. (2009) :
8:39 AM Dec 1st
from Seesmic
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This shark is named Doliodus problematicus.
8:37 AM Dec 1st
from Seesmic
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My research director, Dr. Cloutier, was co-author on the paper describing the oldest articulated chondrichthyan fossil :
8:37 AM Dec 1st
from Seesmic
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[Trinajstic & Dennis-Bryan, 2009] Phenotypic plasticity, polymorphism and phylogeny within placoderms :
8:31 AM Dec 1st
from Seesmic
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[Retallack & al, 2009] Late Devonian tetrapod habitats indicated by palaeosols in Pennsylvania :
8:30 AM Dec 1st
from Seesmic
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[Holland, 2009] Owensia chooi: a new tetrapodomorph fish from the Middle Devonian of [...], Australia :
6:51 AM Nov 23rd
from web
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Yesterday was Rainer Zangerl's birthday :
11:45 AM Nov 20th
from web
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The Bolivian Sacabambaspis : , and a close-up of the tail : [Pradel & al, 2007, fig.2a]
8:55 AM Nov 17th
from Seesmic
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Other things to do with a coelacanth: pet them in a pool :
8:38 AM Nov 17th
from Seesmic
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A video of a coelacanth, where it does it's vertical swimming thing :
8:34 AM Nov 17th
from Seesmic
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A diphycercal tail (heterostracans, but also the extint furcacaudiformes, the coelacanths,...) is symmetrical.
8:32 AM Nov 17th
from Seesmic
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Epicercal: the caudal dorsal lobe is the longest; the opposite would be hypocercal; see here:
8:30 AM Nov 17th
from Seesmic
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Hmm, mistake here: the heterostracan tail is not epicercal, it's diphycercal
8:28 AM Nov 17th
from Seesmic
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How will you recognize your heterostracans? I'd say, by the dual (dorsal and ventral) cephalic shields and the epicercal tail.
8:25 AM Nov 17th
from Seesmic
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The adult version of the Heterostracan Dinaspidella elizabethae : [Greeniaus & Wilson 2003, fig.2E]
8:22 AM Nov 17th
from Seesmic
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Next presentations should be Laurence's, before the end of the year? and mine, hopefully by the end of january 2010.
9:03 AM Nov 6th
from Seesmic
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Cyrena's presenting her doctorate thesis project this afternoon, on chondrichthyan median and paired fins modularity
9:02 AM Nov 6th
from Seesmic
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What's your search engine of choice? I've been pretty satisfied so far with Google scholar
8:03 AM Oct 30th
from Seesmic
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[Ivany & al, 2009] Relative taxonomic and ecologic stability in the Devonian marine faunas of NY state :
7:39 AM Oct 30th
from Seesmic
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Removing Norton antivirus broke Twhirl's connectivity - the problem has now been solved. Expect my random updates to resume.
7:22 AM Oct 30th
from Seesmic
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- Name Devonian Fishes
- Location Rimouski, Québec
- Web http://www.paleob...
- Bio Updates on Devonian paleontology and UQAR's evolutive biology lab; edited by D. Potvin-Leduc
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