Browse Items (264 total)

Stratigraphic Range Silurian to Devonian Taxonomy Phylum: BrachiopodaClass: RhynchonellataOrder: SpiriferidaGenus: Atrypa Distinctive Features Bilateral symmetryTwo valvesCommissureRadial ribsGrowth lines Preservation Mineral replacement of…

Stratigraphic Range Ordovician to Permian Taxonomy Phylum: BrachiopodaClass: StrophomenataOrder: Strophomenida Distinctive Features Bilateral symmetryRibs Preservation External moulds and internal moulds

Species Spirifer verneuli Stratigraphic Range Ordovician to Permian Taxonomy Phylum: BrachiopodaClass: RhynchonellataOrder: Spiriferida Distinctive Features Bilateral symmetryTwo articulated valvesCommissureRibsPedicle Preservation Internal…

Stratigraphic Range Jurassic Taxonomy Phylum: BrachiopodaClass: RhynchonellataOrder: Terebratulida Distinctive Features Bilateral symmetryTwo articulated valvesCommissureGrowth linesPedicle Preservation Mineral replacement of shell

Species Terebratula biplicata Stratigraphic Range Cretaceous Taxonomy Phylum: BrachiopodaClass: RhynchonellataOrder: TerebratulidaGenus: Terebratula Distinctive Features Bilateral symmetryTwo articulated valvesCommissurePedicleGrowth…

Species Terebratula maximes Stratigraphic Range Pliocene to Pleistocene Taxonomy Phylum: BrachiopodaClass: RhynchonellataOrder: TerebratulidaGenus: Terebratula Distinctive Features Bilateral symmetryTwo articulated valvesGrowth…

Stratigraphic Range Ordovician to Carboniferous Taxonomy Phylum: BrachiopodaClass: StrophomenataOrder: StrophomenidaFamily: RafinesquinidaeGenus: Leptaena Distinctive Features Bilateral symmetryRibsGrowth lines Preservation Mineral replacement…

Taxonomy Phylum: Cnidaria Class: Anthozoa Diagnostic features Radial or biradial symmetry External skeleton Septa Tabulae Stratigraphic range Ordovician to present Tabulate, rugose: Ordovician to Permian (extinct at P/T extinction) Scleractinian:…

Taxonomy Phylum: Mollusca Class: Cephalopoda Diagnostic features Simple suture Chambers Central siphuncle Straight, curved or coiled shell Stratigraphic range Cambrian to recent Straight forms: Cambrian to Permian Coiled forms: Devonian to…

Taxonomy Phylum: Hemichordata Class: Graptolithina Diagnostic features Stick-shape (often branched) One or both edges may appear serrated Thecae Rhabdosome Stipes Stratigraphic range Cambrian to Carboniferous (Dendroids) Ordovician to Middle Devonian…