Tuesday, August 01, 2006

Dr. O. Erik Tetlie

I’m a palaeontologist specializing in eurypterids, also called sea scorpions. They were chelicerates, related to scorpions and spiders, but went extinct around 250 million years ago. I’m also interested in chelicerate phylogeny (how all the different groups of chelicerates: mites, spiders, scorpions, and their many chums are related to each other). But I’m also very interested in how other arthropod groups like insects, myriapods, crustaceans, trilobites and pycnogonids are related, although not specifically working on these problems myself. I also have a keen interest in solar system astronomy and the supply and demand situation of metals and energy resources, but do not expect to draw on that expertise in this forum.

P.S. The image is of a model made for the BBC. Sadly, eurypterids are extinct!

12 Comments:

At August 01, 2006, Anonymous Sara said...

What was the largest trilobite?

 
At August 01, 2006, Blogger Q & A said...

The largest trilobite was Isotelus rex from the Late Ordovician (ca 450 million years ago) of Manitoba, Canada. A complete specimen is 70 cm long and 40 cm wide. It was described by Rudkin et al. in Journal of Paleontology in 2003.

 
At August 07, 2006, Blogger Q & A said...

I have been told that there are creatures called pseudoscorpions, that look like real scorpions without the tail. Can you please tell me when and where the earliest forms of these creatures are from?

 
At August 08, 2006, Blogger Q & A said...

Pseudoscorpions do indeed look a bit like scorpions without the sting, but are probably most closely related to the quite large and very quick solifugids (also called sun spiders or wind spiders). Pseudoscorpions are a group with a poor fossil record (they are very small and would easily be overlooked), and most are known from amber. However, the earliest fossil forms are known from the Middle Devonian (ca 390 million years) of Gilboa, New York State. Erik

 
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