researcher
Charlie Underwood

Charlie Underwood

London

Department of Earth and Planetary Science , Birkbeck College

Dr.

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Haven't backed any projects yet! 

Published on Nov 30, 2016

Squaliform tooth paper

Dear All,We have just had an open access paper on the tooth development of squaliform sharks come out, and i hope you find it interesting; if nothing else the photos are goodhttp://rsos.royalsociet...

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Published on Nov 10, 2016

And for those who like their sharks flat.....

I also got a few specimens of skates. This is a mature male (with huge claspers) of Amblyraja radiata- possibly the commonest skate in the cool waters of the North Atlantic. We have...

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Published on Nov 10, 2016

The oddities at the bottom of the sea

As well as heads of the five known UK species of the deepwater catshark Apristurus, there were 2 whole specimen that did not really well match any of them. Are they simply extreme f...

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Published on Nov 10, 2016

Unpacking my presents

I have now been up to Aberdeen and brought back the specimens that Francis Neat so kindle collected. I had to explain to the lady in the airport that the box going through the X-Ray machine may loo...

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Published on Sep 17, 2016

What I have been up to (2)

As well as looking at modern sharks I have been looking at some important fossils. This is a fantastic fossil of an early ray from the Late Jurassic of southern England. This incidentally is part o...

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Published on Sep 17, 2016

What I have been up to (1)

No updates for a while I am afraid, but I have not been completely idle. The Scotia is currently cruising the cold grey seas north of Scotland and will hopefully catch the chimaeras needed for this...

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Published on Jul 14, 2016

A fishy thank you to everyone

It looks as if we have reached the target and i with to offer by fullest thanks to everyone who has helped out. Chimaeras are not the prettiest of fish i grant you, and my lab freezer will never sm...

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Published on Jul 13, 2016

Wot no fish?

Sorry for not being able to do any updates here for a while. I have been in Montenegro supervising some student projects, and did not even get a chance to get to the fish market whilst I was there....

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Published on Jun 28, 2016

More deep sea sharks

The deep water trawls that have produced the chimaeras also brought up some other deep water goodies. Here is a couple of heads of a very poorly known deepsea shark, Apristurus melanoasper. These l...

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Published on Jun 18, 2016

inside the head of a chimaera

Had a chance to get another specimen prepared for study. I had a head of the smalleye rabbitfish Hydrolagus affinis, and have removed the flesh to get at the skull and dentition. Amazingly the huge...

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Published on Jun 13, 2016

What's in my freezer?

Had a chance to have a bit of a sort through the stuff I have in the freezer. I tend to do this at the end of the week to stop people complaining about the smell, but everyone is off marking exams....

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Apparently H. pallidus gets larger but they didn't get any this time. I got samples of most of the NE Atlantic species. If you want tissue samples let me know.
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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That lump of slime and oil is over 2 kilos!
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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This one is now skeletonise (and is coming to the IoW this weekend. I have some smaller ones of other species and could fix one.
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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And the squalene oil was so nice to my hands...
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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I am fixing them so will try to CT scan one; species are identified on such characters as numbers of vertebrae and spiral valves in the gut.
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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Like snakes in ancient bestiaries
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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I have not noticed it; the fleshy electro related tissue seems to be around the head and presumably only sensory in skates. But if no one has looked....
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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No idea. Do any male skates fight for mates like this? Both with tails missing are mature males, the 2 mature males are undamaged. There are also a range of small squaliform sharks there with cutting teeth. Maybe a hit and run attack by an Etmopterus?
Nov 10, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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I am really impressed with what you are trying to do here. With species having been recently described of NW Europe, probably the most fished and researched bit of sea in the world, you must have a treasure trove of material there. One suggestion though; please figure the dentitions of new species; these are often diagnostic in sharks and it now is looking as if the tritoral pattern in chimaeras may be diagnostic too.
Jul 14, 2016
Looking for Lost Sharks: An Exploration of Discovery through the Western Indian Ocean
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Dear Evgeny, Thank you for the support. Eventually i would like to get the dentitions of the chimaeroid species I have get photographed and published. There is often quite a lot of infraspecific variation in tooth plate form, especially ontigenetic, and that has not been recorded properly since Dean. The fin spine is probably from the maastrichtian although we need to look at the matrix. An Edaphodon-like mandibular that David got some years ago may be the same species.
Jul 14, 2016
Tooth plates in chimaeras and their relationship to teeth in sharks
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I would be extremely interested to see how this goes. As the other person on here with deep water species on their minds (chimaera dentitions) it may be useful to see how we could help each other on this. For example, there are good data comparing the biases of different fishing methods in the NE Atlantic. It look as if trawls under sample batoids (the net goes over them) and longlines under sample the very small squalids and scyliorhinids, and virtually miss chimaeroids altogether, presumably due to both hook size and bait.
Jun 13, 2016
What lies beneath? Exploring deep water sharks species of the western Bahamas.
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It would be interesting to see how this goes. I think there is a good story in the change in tooth histology between lamniforms (without a pulp cavity) and the sister groups. I have CT data of small bits of Lamna dentition which may be useful too.
Jun 13, 2016
Tooth Microstructure of the White Shark, Carcharodon carcharias
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