Kosmoceras Posted July 26, 2012 Share Posted July 26, 2012 (edited) Ammonite: Kosmoceras spinosum(?) Geological Age: Jurassic. 157 myo. Stratigraphic Detail: Middle Oxford Clay Locality: Yaxley, Peterborough, Cambridgeshire, UK Date of Discovery: 12/7/12 Edited July 26, 2012 by Kosmoceras Link to comment Share on other sites More sharing options...
pleecan Posted July 26, 2012 Share Posted July 26, 2012 It is going to be a great month... all excellent specimens in their own merit! .... Link to comment Share on other sites More sharing options...
Sinopaleus Posted July 27, 2012 Share Posted July 27, 2012 Here's my best find. A golden plate of pyritized plants from the far east Ferns are exceedingly rare in the formation, so this definitely did make it one of the best finds! Pyritized Plant Slab, Upper Carboniferous (Mississippian), Huigu, Mentougou, Beijing, China Just more pics of the same slab Link to comment Share on other sites More sharing options...
pleecan Posted July 28, 2012 Share Posted July 28, 2012 Very nice Henry! Link to comment Share on other sites More sharing options...
Hieronymus Posted July 28, 2012 Share Posted July 28, 2012 (edited) Well, obviously there have been some awesome discoveries this month. Kudos to all of you! I'll enter as well. The find consists of a Mosasaur tooth (the crown) of Mosasaurus hoffmanni. Mainly the length makes this a less common find, measuring 5.5cm diagonally. It was found on the 26th of July, in the Maastrichtian (Upper Cretaceous) of Eben-emael, Belgium. Since the tooth was found in a block of limestone that tumbled down to a certain level, my guess is that it originates from the Nekum chalk member (Maastricht formation). Edited July 30, 2012 by Hieronymus http://rhaetianlorraine.webs.com/ Link to comment Share on other sites More sharing options...
TOM BUCKLEY Posted July 30, 2012 Share Posted July 30, 2012 (edited) This is a partial trilobite.....just the thorax and pygidium. It's 25mm wide which makes it on the large side for Eldredgeops rana. It's from the Middle Devonian, Wanakah Shale, Ludlowville Formation, Hamilton Group, Hamburg, NY. Collected on 6/17 and prepped on 7/15. All the trilobites I have found at this location had the typical black exoskeleton but this is light tan. Upon closer examination, I discovered black spots on the pygidium and the left pleural lobe. I have seen examples of these markings and they are quite rare. There are two theories on the occurrence of these spots. One holds that they are positions of internal muscle attachment points. The other, and the one I favor, is that the dark spots are actually preserved melanophores which could expand and contract, allowing the trilobite to change color as it moved along the seafloor, much like the extant flounder. My personal opinion is that this is why the exoskeleton is light tan. At the time of it's demise, this trilobite was moving over a light colored sandy bottom and thus the black coloring was contracted into the spots. This is not a spectacular specimen but its condition is extremely rare. I hope you all find it both interesting and informative. Tom Edited August 4, 2012 by TOM BUCKLEY AVOCATIONAL PALEONTOLOGIST STROKE SURVIVOR CANCER SURVIVOR CURMUDGEON "THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS" Link to comment Share on other sites More sharing options...
CH4ShotCaller Posted July 30, 2012 Share Posted July 30, 2012 Nice finds everybody! I really like the Mosasaurus hoffmani tooth. Congratulations on a great find! Anyone who has never made a mistake has never tried anything new. -Albert Einstein Link to comment Share on other sites More sharing options...
Caleb Posted July 30, 2012 Share Posted July 30, 2012 Here goes my entry for this month. Name: Antaphrus borraeus (Wittington, 1954) Formation: Prosser member, Galena Formation Age: Ordovician- Shermanian Where: Southeast Minnesota Found: July 7th Caleb Midwestpaleo.com Link to comment Share on other sites More sharing options...
TOM BUCKLEY Posted July 30, 2012 Share Posted July 30, 2012 Here goes my entry for this month. Name: Antaphrus borraeus (Wittington, 1954) Formation: Prosser member, Galena Formation Age: Ordovician- Shermanian Where: Southeast Minnesota Found: July 7th Caleb, Absolutely no disrespect intended but I can't help it. Your trilobite looks like PACMAN! Oh boy.....I'm really dating myself. Tom AVOCATIONAL PALEONTOLOGIST STROKE SURVIVOR CANCER SURVIVOR CURMUDGEON "THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS" Link to comment Share on other sites More sharing options...
Cris Posted July 31, 2012 Share Posted July 31, 2012 Wow, incredible finds this month. Congrats to everybody. In a normal month, three or four of these fossils would win the contest. Link to comment Share on other sites More sharing options...
Raistlin Posted July 31, 2012 Share Posted July 31, 2012 Caleb, Absolutely no disrespect intended but I can't help it. Your trilobite looks like PACMAN! Oh boy.....I'm really dating myself. Tom Haha I said the same thing about it in his gallery. It certainly is cool looking. Man too bad I have an entry this month lol. RobertSoutheast, MO Link to comment Share on other sites More sharing options...
astron Posted July 31, 2012 Share Posted July 31, 2012 Unbelievable!!! Can you tell, Peter, how did you locate this amazing tiny beauty??? Astrinos P. Damianakis Link to comment Share on other sites More sharing options...
pleecan Posted July 31, 2012 Share Posted July 31, 2012 Unbelievable!!! Can you tell, Peter, how did you locate this amazing tiny beauty??? Shear luck!!! Just finish processing some Arkona mud... and looked under magnification and I almost gasped with excitement! Link to comment Share on other sites More sharing options...
astron Posted July 31, 2012 Share Posted July 31, 2012 Shear luck!!! Just finish processing some Arkona mud... and looked under magnification and I almost gasped with excitement! It was a good luck, for sure!!! I was trying to edit my former post when I saw your answer. I intended adding the question: Do you know if any alike specimens have been described to date??? Astrinos P. Damianakis Link to comment Share on other sites More sharing options...
pleecan Posted August 1, 2012 Share Posted August 1, 2012 It was a good luck, for sure!!! I was trying to edit my former post when I saw your answer. I intended adding the question: Do you know if any alike specimens have been described to date??? I have not seen any close to this ..... I will show it to the ROM.... this is all new to me Link to comment Share on other sites More sharing options...
trilobiteruss Posted August 1, 2012 Share Posted August 1, 2012 Found July 31,2012. This is an amazing discovery... I think this is a baby trilobite larval stage size is approx 1mm +20 mesh screen from Arkona/ Hungry Hollow Mud Middle Devonian Hamilton Group Possible: late-stage dechenellid protaspis . You can see the compound eyes.... Imaged with 2.5X Plan microscope objective coupled to Nikon J1 camera + bellows. Helicon image 11 stacked images into one. Lots of cool stuff this month bu this find gets my vote! :envy: Link to comment Share on other sites More sharing options...
pleecan Posted August 1, 2012 Share Posted August 1, 2012 Lots of cool stuff this month bu this find gets my vote! :envy: Thanks Russ but it is not a trilo larval ... an insect head me thinks ... I am removing the entry.... Link to comment Share on other sites More sharing options...
pleecan Posted August 1, 2012 Share Posted August 1, 2012 Unbelievable!!! Can you tell, Peter, how did you locate this amazing tiny beauty??? I have removed the entry Astron as it is an insect head and not a trilo larval Link to comment Share on other sites More sharing options...
Fossils4U Posted August 1, 2012 Share Posted August 1, 2012 (edited) My entry is this SCARCE Hemipristis shark tooth from Aurora, NC. The color and size are amazing... 1 31/32" on slant almost 2" and 1 23/32" wide. A Monster.... Miocene 4 to 8 million years in age. My heart stoped for a second when I found this one! It probably will not win but I figured I would show it off! You will not see many this size and color. Happy Hunting! Edited August 1, 2012 by Fossils4U Link to comment Share on other sites More sharing options...
zachj Posted August 1, 2012 Share Posted August 1, 2012 My entry is this SCARCE Hemipristis shark tooth from Aurora, NC. The color and size are amazing... 1 31/32" on slant almost 2" and 1 23/32" wide. A Monster.... Miocene 4 to 8 million years in age. My heart stoped for a second when I found this one! It probably will not win but I figured I would show it off! You will not see many this size and color. Happy Hunting! you found that in the current piles? one day i will find a tooth over 3 inches in good conditon haha. Link to comment Share on other sites More sharing options...
trilobiteruss Posted August 1, 2012 Share Posted August 1, 2012 I have removed the entry Astron as it is an insect head and not a trilo larval It was still cool, I saw some mention, oh well neat head! any idea from what? Link to comment Share on other sites More sharing options...
astron Posted August 1, 2012 Share Posted August 1, 2012 (edited) It was still cool, I saw some mention, oh well neat head! any idea from what? Agreed!!! And I think it does worth an entry after the clearance, independently on whatever it is!!! Edited August 1, 2012 by astron Astrinos P. Damianakis Link to comment Share on other sites More sharing options...
Carcharodontosaurus Posted August 1, 2012 Share Posted August 1, 2012 (edited) Well, obviously there have been some awesome discoveries this month. Kudos to all of you! I'll enter as well. The find consists of a Mosasaur tooth (the crown) of Mosasaurus hoffmanni. Mainly the length makes this a less common find, measuring 5.5cm diagonally. It was found on the 26th of July, in the Maastrichtian (Upper Cretaceous) of Eben-emael, Belgium. Since the tooth was found in a block of limestone that tumbled down to a certain level, my guess is that it originates from the Nekum chalk member (Maastricht formation). That's the best mosy tooth I've ever seen without root. I think I've got my vote. Edited August 1, 2012 by Carcharodontosaurus Link to comment Share on other sites More sharing options...
pleecan Posted August 1, 2012 Share Posted August 1, 2012 It was still cool, I saw some mention, oh well neat head! any idea from what? Russ and Astron: I think the head resembles that of deer fly / horse fly with a biting mouth parts.... they have delta shaped wings and a a pest while in the field.... I recently experimented with an ultrasonic deer fly / black fly repeller and it works well. Link to comment Share on other sites More sharing options...
Sinopaleus Posted August 2, 2012 Share Posted August 2, 2012 Very nice Henry! Thanks Peter Pity the head came from an insect instead of a trilobite Would have made a stunning piece.. Link to comment Share on other sites More sharing options...
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