Browse Items (264 total)

Stratigraphic Range Silurian to Triassic Taxonomy Phylum: MolluscaClass: GastropodaGenus: Bellerophon Distinctive Features Coiled shell (planispiral)One chamber Preservation Steinkern(here an internal cast) Advanced notes This specimen…

Stratigraphic Range Modern Taxonomy Phylum: EchinodermataClass: EchinoideaSubclass: Regularia Distinctive Features Pentaradial symmetryAnus and peristome in lineSpine attachmentsAmbulacraAttachments for the jaw apparatus visible on the inside of…

Taxonomy Phylum: EchinodermataClass: EchinoideaSubclass: Regularia Distinctive Features Pentaradial symmetryAnus and peristome lie in lineSpine attachmentsFive sets of ambulacra Preservation Cast (internal mould of an external mould) Advanced…

Stratigraphic Range Upper Cretaceous Taxonomy Phylum: EchinodermataClass: EchinodeaSubclass: IrregulariaOrder: Holasteroida Distinctive Features Bilateral symmetryMouth and anus out of lineFive radial ambulacraInterambulacra with…

Stratigraphic Range Cretaceous Taxonomy Phylum: EchinodermataClass: EchinoideaSubclass: IrregulariaOrder: EchinoneoidaGenus: Conulus Distinctive Features Bilateral symmetryFive radial ambulacraInterambulacraMigrated periproct (opening for…

Species Praecursor Stratigraphic Range Cretaceous Taxonomy Phylum: EchinodermataClass: EchinoideaSubclass: IrregulariaOrder: SpatangoidaGenus: Micraster Distinctive Features Bilateral symmetryFive radial ambulacraPeristome (opening for mouth)…

Species depressus Lestre Stratigraphic Range Jurassic Taxonomy Phylum: EchinodermataClass: EchinoideaSubclass: IrregulariaOrder: HolectypoidaGenus: Holectypus Distinctive Features Bilateral symmetryFive radial ambulacraSpine attachment scars…

Species Florigemma Stratigraphic Range Jurassic Taxonomy Phylum: EchinodermataClass: EchinoideaOrder: CidaroidaGenus: Cidaris Distinctive Features 'Club' shapedThorns Preservation Mineral replacement (calcite)Disarticulated from body…

Taxonomy Phylum: EchinodermataClass: Crinoidea Distinctive Features StemCalyxCrownOssicles (fused) Preservation Cast (manmade)

Stratigraphic Range Jurassic Taxonomy Phylum: EchinodermataClass: CrinoideaOrder: MillericrinidaGenus: Apiocrinites Distinctive Features Pentaradial symmetryCalyxAttachment point for 'arms' of the animal Preservation Cast (manmade)