Browse Items (264 total)

Taxonomy Phylum: Mollusca Class: Bivalvia Diagnostic features Palial line/palial sinus Adductor muscle scars Growth lines Dorsoventral symmetry (some exceptions, for example Gryphaea) Two hinged valves Umbo Hinge Gills (rarely…

Stratigraphic Range Permian to Carboniferous Taxonomy Phylum: MolluscaClass: BivalviaOrder: PectinidaFamily: Pterinopectinidae Distinctive Features RibsUmboGrowth lines Preservation Compression between mud layersPotentially carbonization,…

Species Liostrea Stratigraphic Range Triassic to Eocene Taxonomy Phylum: MolluscaClass: BivalviaOrder: Gryphaeidae Distinctive Features Growth linesTwo articulating valvesAdductor muscle scar Preservation Original shell material Advanced…

Stratigraphic Range Jurassic to recent Taxonomy Phylum: MolluscaClass: BivalviaOrder: TrigoniidaFamily: Trigoniidae Distinctive Features RibsDentition, hingeGrowth lines Preservation Set 1:Mineral replacement of shell (aragonite to calcite)Set…

Species virgula Stratigraphic Range Jurassic Taxonomy Phylum: MolluscaClass: BivalviaOrder: OstreoidaFamily: Gryphaeidae Distinctive Features Growth linesRibsUmboTwo valves Preservation Mineral replacement of shell Advanced notes A…

Species Gryphaea dilatata Stratigraphic Range Jurassic Taxonomy Phylum: MolluscaClass: BivalviaOrder: OstreoidaFamily: Gryphaeidae Distinctive Features UmboGrowth linesTwo articulated valves Preservation Mineral replacement of…

Stratigraphic Range Triassic to Cretaceous Taxonomy Phylum: MolluscaClass: BivalviaOrder: OstreoidaFamily: BakevelliidaeGenus: Gervillella Distinctive Features UmboGrowth linesTwo articulated valves Preservation Mineral replacement of…

Stratigraphic Range Triassic to present Taxonomy Phylum: MolluscaClass: BivalviaOrder: PectinoidaFamily: SpondylidaeGenus: Spondylus Distinctive Features UmboRibsDorso-ventral symmetryTwo valves Preservation Mineral replacement of…

Stratigraphic Range Jurassic to Cretaceous Taxonomy Phylum: MolluscaClass: BivalviaOrder: PraecardioidaFamily: InoceramidaeGenus: Inoceramus Distinctive Features RibsUmboTwo valvesNear dorso-ventral symmetry Preservation Internal mould

Stratigraphic Range Eocene Taxonomy Phylum: MolluscaClass: BivalviaOrder: CarditoidaFamily: CrassatellidaeGenus: Crassatella Distinctive Features RibsGrowth linesUmboDentitionAdductor muscle scarsPalial line Preservation Original shell…