Jump to content

goniatite ammonoid UL b1.JPG

Dpaul7

By Dpaul7

 Share
Goniatite Ammonoid
 
Unknown location; probably Morocco, possibly Timor
Middle Devonian – Late Permian (390–251.4 Million Years Ago)
This was a gift. I know the dealer who SOLD it, I know where HE got it. This "original" dealer sells ammonoids from all over, but polished ones are either Morocco or Timor. Because the exact location is unknown, I cannot supply a more definitive age for this fossil. Goniatids, informally Goniatites, are ammonoid cephalopods that form the Order Goniatiida, derived from the more primitive Anarcestida during the Middle Devonian some 390 million years ago. Goniatites (goniatitida) survived the Late Devonian extinction to flourish during the Carboniferous and Permian only to become extinct at the end of the Permian some 139 million years later.All goniatites possessed an external shell, which is divided internally into chambers filled with gas giving it Buoyancy during the life of the animal. An open chamber at the front of the shell provided living space for the goniatitid animal, with access to open water through an aperture. The general morphology and habit of goniatites was probably similar to that of their later relatives the ammonites, being free swimming and possessing a head with two well developed eyes and arms (or tentacles). The typical goniatitid has a suture with smooth saddles and lobes, which gives the name "goniatitic" to this particular suture pattern. In some the sutures has a distinctive "zigzag" pattern Not all goniatitid ammonoides have goniatitic sutures. In some the sutures are ceratitic, in others, even ammonitic. Nor are goniatitic sutures limited to the Goniatidia. The sutures of nautiloids are by comparison somewhat simpler, being either straight or slightly curved, whereas later ammonoids showed suture patterns of increasing complexity. One explanation for this increasing extravagancy in suture pattern is that it leads to a higher strength of the shell.
***SPECIAL NOTE*** - The "flashy" bit in the first photo is NOT Ammolite or some such mineral - It is merely a reflection from my flash on the camera.
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Goniatitida

From the album:

MY FOSSIL Collection - Dpaul7

· 934 images
  • 934 images
  • 3 comments
  • 59 image comments

Photo Information

  • Taken with Canon Canon PowerShot SX120 IS
  • Focal Length 7.3 mm
  • Exposure Time 1/60
  • f Aperture f/3.2
  • ISO Speed 80
View all photo EXIF information
 Share

Recommended Comments

There are no comments to display.

×
×
  • Create New...