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Small Ceratite Ammonoid - Timor 1.JPG

Dpaul7

By Dpaul7

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Ceratites Ammonoid

Timor, Indonesia
Probably Permian (298.9-251.902 million years ago)
Ceratites ("Horn Stone") is an extinct genus of ammonite cephalopods. These nektonic carnivores lived in marine habitats in what is now Europe, Asia, and North America, during the Triassic, from Anisian to Ladinian age. This ammonite has a ceratitic suture pattern on its shell (smooth lobes and frilly saddles). Evolution of the frilly saddles is thought to be due to increased pressure on the shell, at greater depth. The frilly pattern would increase the strength of the shell and allow Ceratites to dive deeper, possibly in search of food. Fossils of species within this family have been found in the Triassic of Austria, Canada, China, France, Germany, Hungary, India, Israel, Italy, Pakistan, Poland, Russia, Thailand, Turkey and United States. This specimen is unpolished.
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda Subclass: †Ammonoidea
Order: †Ceratitida
 
 

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Photo Information

  • Taken with Canon Canon PowerShot SX120 IS
  • Focal Length 9.1 mm
  • Exposure Time 1/60
  • f Aperture f/3.2
  • ISO Speed 80
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Dpaul7

CORRECTION:

 

Identity should be as follows:

cf Paralegoceras sp Ammonoid (Synonym Metalegoceras)

 

SITE LOCATION: Timor
TIME PERIOD: Permian (298.9-251.902 million years ago)
Data: Metalegoceras is an extinct genus of marine cephalopods belonging to the family Schistoceratidae. This species have been found in the Permian of Australia, Canada, China, East Timor, Indonesia, Kazakhstan, Malaysia, Oman, Russia and United States. This belongs to the order Goniates. 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.
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda  Subclass: †Ammonoidea
Order: †Goniatitida  Suborder: †Goniatitina  Superfamily: †Neoicoceratoidea
Family: †Metalegoceratidae
Genus: cf †Metalegoceras/Paralegoceras

 

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