Systematics and Biogeography blog

The estimable Drs David Williams and Malte Ebach have started a blog on Systematics and Biogeography, which supports a recent book they haven't sent me a free copy of yet. Expect much puncturing of pretensions and orthodoxies.

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The term "radical" is a very loose term. It basically means "something that differs wildly from the consensus" in ordinary usage. So I hope David Williams and Malte Ebach won't take offense if I say that they have a radical interpretation of the nature of classification. In a couple of recent…
Today I got my manuscript off to the publisher. Heaven knows what the editors will do with it; I expect a sympathetic treatment as the publisher's editorial board are quite keen. But it's like having a ten year boil lanced. And seeing a favourite child graduate. All at once. So it remains for me…
This is my favorite web carnival, and this is the best version of it yet, owing to the outstanding submission we have this month! Welcome to the 15th Monthly edition of the blog carnival Linnaeus' Legacy. I thought about being cute and fancy for this edition of the carnival, but instead, I decided…
In which our hero discovers the joys of walking... Next on my trip, I visited David Williams, a paleobiologist at the Museum of Natural History in London. We talked at length about the nature of systematics (which is something I am increasingly less certain about) and of the history of species…

Read through the posted link. Very interesting. Having been an aspiring paleontologist up throught the MS, I think this business of dating lineages based on fossils is pretty scary. Fortunately the group I have done the most systematic work on, the family Rivulidae of the Aplocheiloid killifishes, have, so far as I know, no fossil representatives. There have been two independent DNA trees done for the Aplocheiloids, and they are similar enought that we might actually know something. When relationships and distributions are compared to continental drift maps, one feels pretty confident as to what the vicariant events were. So we can date the vicariant events based on geological, but nonfossil, information. We have revised one Rivulid genus based on DNA. The sequence of speciation events and the geological history of that part of South America correlate very nicely. Talking around, workers in other fish groups are coming up with the same sort of scenario. If all this is so, the modern bony fishes originated earlier than we have thought, and diversification was rapid early on.

By Jim Thomerson (not verified) on 23 Oct 2007 #permalink