Prolylleceras peruvianum Ammonite 1.JPG
Prolylleceras peruvianum Ammonite
Huaraz Province Ancash, Peru
Cretaceous Period (145-66 million years ago)
Slightly compressed and high whorled with radiate to prorsiradiate, straight to flexuous ribs, with ribs continuous across venter or in some flattened on it at early growth stages. Ventrolateral and siphonal clavi subordinate to ribs. No lateral tubercles on primitive morphologies. Outer lateral punctiform to clavate tubercles in evolute species during middle growth, perhaps not disappearing completely on body chamber. Inner lateral punctiform tubercles in most evolute species restricted to young and middle growth stages.
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda Subclass: †Ammonoidea
Order: †Ammonitida
Family: Prolyelliceratidae
Genus: Prolylleceras
Species: peruvianum
Photo Information
- Taken with Canon Canon PowerShot SX120 IS
- Focal Length 6 mm
- Exposure Time 1/50
- f Aperture f/2.8
- ISO Speed 200
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