Fish Fin Spine

[Mike from North Queensland]

Looking through my latest batch of processed matrix I noticed what I first thought was a fish jaw with very small teeth, on closer inspection I think most likely a fin spine from a bony fish.

Any ideas or leads would be appreciated. Thanks in advance. Scale is in millimetres. The specimen is Albian, Cretaceous in age from a marine deposit from central Queensland Australia about 100 million years old for reference to comparative material.

Mike

[Al Dente]

My first guess would be chimaera dorsal spine. Some chimaeras have the double row of teeth on the back of the spine.

[Mike from North Queensland]

I looked up some photos on the net for chimaera dorsal spine and am now sure that is what it is plus I have found actual teeth in the past in the area..

Thanks Mike

[Mtskinner]

Sweet find...it looks identical to one I posted a few weeks back!

Edited November 11, 2014 by Mtskinner

[siteseer]

Mike,

It could be a section of dorsal fin spine of a hybodont shark but since you seem to find some deepwater sharks like Echinorhinus at your site, I would lean toward chimaeroid as well.

Jess

I looked up some photos on the net for chimaera dorsal spine and am now sure that is what it is plus I have found actual teeth in the past in the area..

Thanks Mike

[Fossildude19]

That's a pretty cool find, Mike!

Thanks for posting it.

Regards,

[Mike from North Queensland]

Thanks for all the comments attached is a photo of a tooth I found a while back.

Mtsinner I like your specimen

Mike

[rodrex]

this will help with the ID

Citation: Bartholomai, A. 2015: Additional chimaeroid specimens from the Early Cretaceous (Late Albian) Toolebuc Formation, Queensland, Australia. Memoirs of the Queensland Museum - Nature 59: 177–185. Brisbane. ISSN 2204-1478 (Online) ISSN 0079-8835 (Print). Accepted: 10 June 2015. First published online: 15 September 2015.

[Mike from North Queensland]

Thanks rodrex I have saved the paper for my collection.

Mike