Browse Items (264 total)

Species Lithophaga inclusa Stratigraphic Range JurassicLithophaga: Triassic to recent Taxonomy Phylum: MolluscaClass: BivalviaOrder: MytilidaFamily: Mytilidae Distinctive Features Dorsoventral symmetryTwo valvesGrowth…

Species Opis virdunensis Buvignier Stratigraphic Range Jurassic Taxonomy Phylum: MolluscaClass: BivalviaOrder: CarditidaFamily: Astartidae Distinctive Features Two valvesHingeAdductor muscle scarsDorso-ventral symmetry Preservation Internal…

Species Dimyodon nilssoni Stratigraphic Range Cretaceous Taxonomy Phylum: MolluscaClass: BivalviaOrder: Ostreoida Preservation Cemented onto fish vertebra Advanced notes Identification of these as bivalves took a very long time…

Stratigraphic Range Ordovician to recent Taxonomy Phylum: MolluscaClass: BivalviaOrder: OstreoidaFamily: Pectinidae Distinctive Features RibsGrowth linesCharacteristic 'fan' shape (Pecten only) Preservation Original shell material Advanced…

Species Unio littoralis Taxonomy Phylum: MolluscaClass: BivalviaOrder: UnionataFamily: Unionidae Distinctive Features UmboTwo valves showing dorso-ventral symmetryGrowth linesAdductor muscle scarPalial lineDentition Preservation Original…

Stratigraphic Range Cretaceous to recent Taxonomy Phylum: MolluscaClass: BivalviaOrder: ArcoidaFamily: Glycymerididae Distinctive Features Growth linesAdductor muscle scarsHingePalial line Preservation Original shell

Taxonomy Phylum: MolluscaClass: Bivalvia Distinctive Features Ribs Preservation Manmade external mould Advanced notes Although this particular specimen is a manmade mould, internal and external moulds are common ways in which bivalves are…

Taxonomy Phylum: Brachiopoda Diagnostic features Two valves (brachial and pedicle) Bilateral symmetry Growth lines Adductor and ductor muscle scars Pedicle Commissure Gape Teeth and socket (articulates; no teeth or socket in…

Stratigraphic Range Cambrian to Ordovician Taxonomy Phylum: BrachiopodaClass: LingulataOrder: LingulidaGenus: Lingulella Distinctive Features Bilateral symmetryGrowth lines Preservation Organic film Advanced notes Lingulella had a phosphate…

Stratigraphic Range Ordovician Taxonomy Phylum: BrachiopodaClass: RhynchonellataOrder: OrthidaGenus: Orthis Distinctive Features Bilateral symmetryRadiating ribs Preservation External mould