Coralline Oolite Formation [details]
Apical disc with a single suranal plate that is wider than long and typically somewhat asymmetric, not forming a ... [details]
A genus of Diplopodiidae with a deeply invaginated peristome that is smaller than the apical disc in diameter. ... [details]
Small, regular echinoid with a large apical disc whose plates are not firmly bound to the corona. Ambulacral ... [details]
A glypticid with very strongly developed, coarse epistroma over its aboral surface, and with rudimentary aboral ... [details]
A species of Glyptodiadema whose primary interambulacral tubercles at and below the ambitus are large and have ... [details]
Interambulacral zones having two adapical plates in each column with much reduced primary tubercles. Ambulacral ... [details]
Apical disc hemicyclic with very large periproct occupying more than 70% of the apical disc diameter. Primary ... [details]
Primary ambulacral tubercles become irregularly uniserial in zone around ambitus. Periproct less than two-thirds ... [details]
Apical disc plating hemicyclic with only ocular plate III consistently exsert; plating easily detached from corona. ... [details]
A Plesiocidaris with trigeminate ambulacral plate-compounding and a short transitional zone of acrosaleniid-style ... [details]
A Psephechinus with relatively tall interambulacral plates which, above the ambitus, bear dense tubercles in two ... [details]
An acrosaleniid with an elongate apical disc; apical disc plates only loosely attached to corona. Ambital and ... [details]
Apical disc dicyclic, plates naked except for one or two minute granules. Ambulacral plating trigeminate at ambitus ... [details]
A tall species of Stomechinus with subconical profile and flat base; ambitus close to the base. Apical disc ... [details]
A small Trochotiara with ambital interambulacral plates that are almost as high as wide and bear a large primary ... [details]
Distinguished from other species of Trochotiara by having wide interradial and perradial zones of granules, and a ... [details]
Genus or regular echinoid with a monocyclic apical disc that incorporates numerous periproctal plates. Ambulacral ... [details]
From the Latin cune for wedge-shaped and dens for tooth, in reference to its distinctive tooth structure. [details]
Bathonian beds of western Europe and North Africa [details]
Upper Trigonia Grit and Clypeus Grit members; upper Bajocian Garantiana and Parkinsoni zones; France [details]
Middle and Upper Bathonian of the UK; Bathonian and Callovian of France and Switzerland [details]
Upper Bajocian Garantiana or Parkinsoni zones; Upper Bajocian Parkinsoni Zone [details]
Middle Oxfordian Tenuiserratum Zone [details]
Midddle Oxfordian Tenuiserratum Zone [details]
Upper Callovian Athleta Zone, of Stanton Harcourt, Oxfordshire, Weymouth Member, Lower Oxfordian Mariae Zone, of St ... [details]
Lower Jurassic (Sinemurian to Pliensbachian) [details]
Upper Sinemurian to Lower Pliensbachian of southern England; Lower Pliensbachien Davoei Zone of the French Ardennes [details]
Upper Bathonian Discus Zone to Lower Callovian Herveyi Zone [details]
Lower to Upper Oxfordian, UK and western Europe [details]
Tithonian kerberus Zone [details]
Upper Bajocian to the Upper Bathonian [details]
uppermost Bajocian (Parkinoni Zone), lowermost Bathonian (Zigzag Zone); Aalenian [details]
Aalenian Murchisonae Zone; Lower Bajocian Ovalis Zone [details]
Middle Oxfordian Tenuiserratum Zone UK and France [details]
Upper Bathonian Discus Zone [details]
Pliensbachian of France and England [details]
Upper Pliensbachian Spinatum Zone, Tilton, Leicestershire; Billedon Copland, Leicestershire; Stinchcombe, ... [details]
Middle Bathonian Progracilis to Subcontractus zones [details]
Middle Oxfordian Tenuiserratum Zone of the UK; Oxfordian and Kimmeridgian of France and Switzerland [details]
Upper Bajocian Parkinsoni Zone; Lower Bajocian Ovalis Zone [details]
Bathonian of Cuers of France; Bathonian of southern England [details]
Tithonian Glaucolithus Zone [details]
Middle Bathonian, Upper Bathonian Discus Zone of the UK; Upper Bathonian of France [details]
Bathonian Calcaire à polypiers of Lagrune, Calvados, France; Great Oolite Group and Upper Bathonian Retrocostatum ... [details]
Upper Bathonian [details]
Tithonian Kerberus Zone of Brill, Buckinhamshire, UK; Tithonian of France [details]
Tithonian Albani or Glaucolithus Zone, Portland, Dorset [details]
Middle to Upper Bathonian, Morrisi to Discus of the UK; Bathonian of western Europe [details]
Middle and Upper Bathonian of England [details]
Aalenian [details]
Upper Bajocian to Upper Bathonian [details]
Middle Bathonian Progracilis or Subcontractus zones, Upper Bathonian ?Retrocostatum Zone of the UK; Bathonian of ... [details]
Aalenian England and France [details]
Upper Pliensbachian Spinatum Zone to Lower Toarcian Tenuicostatum Zone [details]
Upper Bajocian Parkinsoni Zone of the UK; Upper Bajocian of Normandy, France [details]
Upper Bathonian Retrocostatum Zone; Upper Bajocian Parkinsoni Zone; Middle Bathonian Progracilis Zone [details]
Lower Bajocian Laeviscula Zone [details]
Aalenian, Scissum Zone, Morcott, Rutland [details]
Aalenian to Upper Bathonian of England [details]
Lower to Middle Oxfordian of England [details]
Lower Aalenian to Lower Bajocian, England, Aalenian of France [details]
Forest Marble and Cornbrash formations; Blisworth Limestone Formation; White Limestone Formation [details]
Oolite Marl (= Birdlip Limestone Formation, Scottsquar Member, Aalenian Bradfordensis Zone); Salperton Limeston ... [details]
Cornbrash, Forest Marble, Fullers Earth and White Limestone formations [details]
Lower Inferior Oolite Group; Salperton Limestone Formation, Upper Trigonia Grit Member, Clypeus Grit Member [details]
Coral Rag Member of the Coralline Oolite Formation [details]
Cornbrash Formation; Coraline Oolite Formation, Coral Rag Member; Oxford Clay Formation [details]
Oxford Clay Formation [details]
Charmouth Mustone Formation (at type locality) [details]
Cornbrash Formation (at type locality) [details]
Basal Shell Bed of the Portland Formation [details]
Taynton Limestone Formation [details]
Inferior Oolite Group [details]
Crickley Member or Cleeve Cloud Member of the Birdlip Limestone Formation; Millepore Bed of the Cloughton Formation [details]
Corallian Oolite Formation, Coral Rag Member [details]
Cornbrash Formation [details]
Coralline Oolite Formation, Coral Rag Member; Middle Oxfordian Coralline Oolite Formation; West Walton Formation [details]
"Transition Zone" of the Marlstone Rock Formation [details]
Taynton Limestone Formation (Stonesfield Slate) [details]
Dundry Hill Coral Bed in the Inferior Oolite Group; Aston Limestone Formation [details]
Forest Marble Formation [details]
Portland Formation (at type locality) [details]
Great Oolite Group; Forest Marble Formation [details]
Great Oolite Group; Kemble Beds, Forest Marble Formation [details]
Portland Formation [details]
Portland Sand, lower part of the Portland Formation; Berriasian Cinder Bed [details]
Cornbrash Formation; Fuller's Earth Formation / White Limestone Formation; Great Oolite Group [details]
Forrest Marble Formation; Hampen Formation; Cornbrash Formation; Great Oolite Group [details]
Birdlip Limestone Formation [details]
Upper Trigonia Grit; Forest Marble Formation [details]
Bathonian Clay above the Stonesfield Slate (i.e. Hampen Formation); Great Oolite Group; Inferior Oolite Group [details]
Marlstone Rock Formation (at type locality) [details]
Upper Coral Bed, Salperton Limestone Formation [details]
Great Oolite Group; Inferior Oolite Group; Taynton Limestone Formation [details]