Browse Items (264 total)

Species Dactylioceras commune Stratigraphic Range Jurassic Taxonomy Phylum: MolluscaClass: CephalopodaSubclass: AmmonoideaOrder: Ammonitida Distinctive Features RibsImprint of inner whorls visibleCurved shape (part of…

Species Ceratites Stratigraphic Range Triassic Taxonomy Phylum: MolluscaClass: CephalopodaSubclass: AmmonoideaOrder: Ceratitida Distinctive Features PlanispiralApertureBody chamberCeratitic suture linesEvolute Preservation Internal…

Species Goniaites Stratigraphic Range Devonian to Permian Taxonomy Phylum: MolluscaClass: CephalopodaSubclass: AmmonoideaOrder: Goniatitida Distinctive Features Planispiral shellGoniatitic suture linesInvolute Preservation Internal mould

Species latus Parkinson Stratigraphic Range Jurassic Taxonomy Phylum: MolluscaClass: CephalopodaSubclass: AmmonoideaOrder: Ammonitida Distinctive Features Straight edgeGrowth linesCurved plate Preservation CalciteDisarticulated from ammonite…

Taxonomy Phylum: Mollusca Class: Cephalopoda Subclass: Ammonoidea Diagnostic features [See labelled diagram above] Aragonite shell Septa Suture (different for goniatites, ceratites and ammonites, see second diagram…

Taxonomy Phylum: Mollusca Class: Cephalopoda Subclass: Coleoidea Cohort: Belemnoidea Diagnostic Features Diagram with labelled features of belemnites 'Bullet' shape Phragmocone: chambers divided by aragonitic septa (often preserved as conical…

Stratigraphic Range Carboniferous to Cretaceous Taxonomy Phylum: MolluscaClass: CephalopodaOrder: Belemnitida Distinctive Features Guard of radial calcite crystalsConical cavity where phragmocone used to be Preservation Aragonitic phragmocone…

Stratigraphic Range Carboniferous to Cretaceous Taxonomy Phylum: MolluscaClass: CephalopodaOrder: BelemnitidaSet 1:Group: CylindroteuthisSet 2:Group: unknown Distinctive Features Guard with radial calcite crystalsCrushed conical hole where…

Species Hastatus Stratigraphic Range Jurassic Taxonomy Phylum: MolluscaClass: CephalopodaOrder: BelemnitidaGenus: Hibolites Distinctive Features 'Bullet' shapeGuard with radial crystalsHollow phragmocone area Preservation Mineral replacement…

Taxonomy Phylum: MolluscaClass: CephalopodaOrder: Belemnitida Distinctive Features 'Bullet' shapeConical hole where phragmocone used to beRadial crystals (here in cross section) Preservation Peel of a cross section through a belemnite…