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Showing results for tags 'prolylleceras peruvianum ammonite'.
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From the album: MY FOSSIL Collection - Dpaul7
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 -
From the album: MY FOSSIL Collection - Dpaul7
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 -
From the album: MY FOSSIL Collection - Dpaul7
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