Natural History - Mosasaur Fossil Tooth Group

Jurassic Period, circa 200 million years B.P. Promicroceras planicosta with iron stained surface giving a beautiful contrast in colour, from the Lower Lias, Obtusum Zone. 42.53 grams, 67 mm (2 3/5 in.

Eocene Period, 58-36 million years BP. The group comprises a Knightia alta (upper) and a Diplomystus sp. (lower) fossil fish, on the matrix plaque. 612 grams, 22.5cm (8 3/4"). From the Pradi Collectio

Oligocene Period, circa 34-23 million years B.P. A group of three fossil leaves in matrix. 15 grams total, 59-77 mm (2 3/8 - 3 in.). From Beaverhead County, Montana, U.S.A.Collected between 1930 and 1

Middle Ordovician Period, 400 million years BP. A group of two specimens of the trilobite Ogygiocarella debuchi with Gregory, Bottley, and Lloyd label reading: MID-ORDOVICIAN TRILOBITE, Ogygiocarella

Jurassic to Carboniferous Period, 199-3 million years B.P.. Mostly consisting of various species of ammonite, together with a number of shells. 362 grams total, 10-87 mm (3/8 - 3 3/8 in.). Acquired on

Eocene Period, circa 50 million years B.P. A group of three fossil flies in matrix. 216 grams total, 73-82 mm (2 3/4 - 3 1/4 in.). From the Green River Formation, South Western Wyoming, U.S.A.Collecte

Eocene Period, 56-33 million years BP. Two Knightia alta fossil fish in a matrix slab. 1.6 kg, 29.5cm (11 1/2"). From the Pradi Collection, Boston, USA; acquired during the 1980s; from the Green River

Devonian Period, 417-354 million years B.P. A group of three Morocops (Barrandeops) sp. trilobites on a matrix. 256 grams total, 51-59 mm (2 - 2 3/8 in.). From the Atlas Mountains, Hamar Laghdad Forma

Eocene Period, 55-33 million years BP. A group of three rare unclassified agatized Dicotaledon cone specimens clearly showing the external structures. 48 grams total, 4-5cm (1 1/2 - 2"). From an old B

Carboniferous Period, circa 310 million years B.P. A group of three fern specimens including Alethopteris sp. and Sphenopteris laurenti. 281 grams total, 76-87 mm (3 - 3 3/8 in.). From the Middle Coal

Ordovician-Silurian, 488-415 million years BP. A group consisting of one Silurian and two Ordovician trilobites, two in old white card trays with A.B. Cotterill Collection, Wollaton, Nottingham, UK, l

Devonian Period, circa 417-354 million years B.P.. Three Flexicalymene sp. trilobites from nodules. 351 grams total, 71-86 mm (2 3/4 - 3 3/8 in.). From Morocco, North Africa.From a Cambridgeshire, UK,

Devonian Period, circa 417-354 million years B.P. Comprising three polished, dome-shaped masses, each with a central Goniatite sp. specimen. 368 grams total, 70-75 mm (2 3/4 - 3 in.). From the Atlas M

Ordovician Period, circa 510-445 million years B.P. Comprising four Flexicalymene sp. specimens. 260 grams total, 72-82 mm (2 3/4 - 3 1/4 in.). From a Cambridgeshire, UK, collection. Property of a Cam

Carboniferous, 359-299 million tears BP. A group consisting of four specimens of stigmaria, the roots of coal forest lycopsid trees such as Sigillaria and Lepidodendron, each with paper label attached

Ordovician-Permian, 488-252 million years BP. A group of eight brachiopods, including one spirifer and seven terebratulids, in old white card trays with A.B. Cotterill Collection, Wollaton, Nottingham

Carboniferous-Cretaceous Period, 359-66 million years BP. A group of six fossils of different cllasses and periods, including four bivalves, a goniatite, and an ammonite, five in old white card trays

Carboniferous Period 359-299 million years BP. A group of three large diameter (up to 33mm) crinoid stems, in white card trays with A.B. Cotterill Collection, Wollaton, Nottingham, UK, labels. 271 gra

Carboniferous Period 359-299 million years BP. A group of two limestone sea-floor specimens with numerous crinoid stem segments and bryozoans from Barry, Glamorganshire, in white card trays with adhes

Silurian Period, 444-415 million years BP. A group of seven corals from Salop, UK, in old white card tray with A.B. Cotterill Collection, Wollaton, Nottingham, UK, label. 40 grams total, 23-32mm (3/4-

Carboniferous-Jurassic, 359-145 million years BP. A group of seven brachiopod specimens, including four spirifers (two in matrix), and three terebratulids, in old white and brown card trays with A.B.

Middle Jurassic, Inferior Oolite, Aalenian Stage, 170 million years BP. A group of two fossil ammonites on matrix, one Graphoceras sp. and the other possibly Leioceras sp., in old white card trays, on

Middle Cretaceous Period, circa 150 million years B.P. Comprising three Douvilleiceras sp. specimens (sometimes known as a Goat Horn), polished to reveal rich calcites and suture patterns. 160 grams t

Cretaceous Period, 200-65 million years BP. Group comprising: a small ammonite, cut and polished in two halves, with two small fossil fish specimens, in matrix. 618 grams total, 3.2-14.7cm (1 1/4 - 5