Silurian

Isolated Trilobite: Aulacopleura koninckii isolatesAge: Upper Silurian, epsilon-beta;Found in: Lodenitz, CzechiaSize: 4 x 3 cmColors on photos may differ slightly from those of the original specimen for technical reasons.

Remarkably beautiful, large, and tridimensionally preserved head ofBalteurypterus tetragonophtalmus on matrix.Eurypterids, also known as sea scorpions due to their pointed tails, originated in the Ordovician period. They were the dominant predators of the Upper Ordovician, Silurian, and Lower Devonian seas and reached their greatest species diversity during this time.This order's most impressive representatives could grow up to a length of 3 m, while Balteurypterus tetragonophtalmus only reached a few modest centimeters. The large group of eurypterids had a fin-like, powerful last pair of legs. They also had two respiratory systems, book gills and gill plates, and trace fossils show that they were quite capable of going ashore. Unfortunately, they didn't quite make the leap, for like their close relatives, the horseshoe crabs, they used their leg attachments for chewing, which is much more efficient underwater than on land.Fish were increasingly competing with them in the marine environment, causing the Eurypterids to retreat to river systems.Only a few varieties of what is believed to be the largest known arthropod of all time remained in the Permian period.Age: Silurian, Bagovitsa FormationLocality: Smotrych (left branch of Dniester River), near Kamianets-Podilskyi,Khmelnytskyi Oblast, UkraineHead size: 2.7 cmMatrix: approx. 3.5 x 3.5 cmDue to technical reasons, colors in product photos may differ from those of the original piece.

Age: Upper Silurian;Locality: Valley of Kosoř near Radotin, district Prague-West, Central Bohemian Region, Czech RepublicSize: approx. 5 x 5 x 1 cmColors in product photos may differ slightly from those of the original specimen due to technical reasons.

With potential for follow-up preparation.Age: Middle Silurian;Locality: Dudley, West Midlands, England, UKSize: approx. 5 x 4 x 2 cmColors in product photos may differ slightly from those of the original specimen for technical reasons.

Isolated head of a eurypterid of the species Eurypterus lacustris on matrix. Period: Upper Silurian;Location: Litchfield, New YorkDimensions: 9 x 5.5 x 1.7 cmColors on photos may differ slightly from those of the original specimen for technical reasons.

Age: SilurianLocality: Gotland, SwedenSize: approx. 6 x 7 cm (coral 2x3 cm)Colors on photos may differ from the colors of the originals due to technical reasons.

Beautiful halysites or chain coral. Clearly recognizable by the characteristic 'chain pattern' that permeates the stone and is also visible on the rear as well as the long tubes on the side.Age: Silurian;Locality: Gotland, Gotlands Län, SwedenSize: 10 x 7,5 x 6,5 cmColors on product photos may differ from those of the original specimen due to technical reasons.

Historical microscope slide with retiolid graptolite. Isolated and therefore very detailed.Rare piece!Age: Lower Silurian, Ludlow; Locality: Northern glacial till, Berlin-Spandau, Havelland/Berlin, GermanyDue to technical reasons, colors on photos may differ slightly from those of the original specimen.

A truly exceptional specimen: the graptolite was removed entirely from the boulder, probably with acid, and is present in isolated three-dimensional (!) preservation.Age: Upper Silurian, Lower Ludlowian;from Pleistocene glacial till;Locality: Berlin-Spandau, Berlin, GermanySize of microslide: 77 x 28 mmColors in product photos may differ slightly from those of the original specimen due to technical reasons.

Period: Silurian;Location: Panitzsch near Taucha, close to LeipzigDimensions: approx. 11.5 cm x 9 cm x 1.5 cmMonograptus is a genus of graptolites belonging to the order Graptoloidea. This genus represents the final stage of graptolite evolution prior to their extinction in the Early Devonian. Characteristic features of the genus include a single-rowed stipe with highly elaborate thecae. This genus comprises a large number of graptolite species and may not be monophyletic.The colours on the pictures may slightly differ from the original specimen.

Age: Upper Silurian, Zone 15-16;Locality: Ronneburg, Main-Kinzig district, Hesse, GermanySize: approx. 11 x 10 x 0,5 cmMonograptus is a genus of graptolites in the order Graptoloidea. This particular genus is the last stage of the graptoloid evolution before its extinction in the early Devonian. A characteristic of the genus includes one uniserial stipes with very elaborate thecae. This particular genus contains a large number of graptolite species and may not be monophyletic.Colors in product photos may differ from those of the original specimen for technical reasons.

Old collection piece.Age: Silurian;Locality: Kosov near Beroun, Bohemia, Czech RepublicSize: approx. 10 x 7 x 2 cmColors on photos may differ slightly from those of the original piece due to technical reasons.

Deformed lobolite (hollow, spherical stem section of Scyphocrinites), the “floating body” or floating apparatus of a crinoid.Age: Silurian;Locality: Karlštejn, Beroun district, Středočeský kra (Central Bohemian Region), Czech RepublicSize: approx. 8 x 7 x 3 cmColors on product photos may differ slightly from those of the original specimen due to technical reasons.

One cephala and several thorax segments of Balteurypterus tetragonophtalmus.Age: Silurian, Bagovitsa Fm;Locality: Smotrych (left tributary of the Dniester), near Kamjanez-Podilskyj, Khmelnytskyi oblast, UkraineSize head: 2,5 x 2 cmSize matrix: approx. 11 x 4 x 1,8 cmEurypterids, also known as sea scorpions because of their pointed tails, evolved in the Ordovician. They were the dominant predators of the Upper Ordovician, Silurian and Lower Devonian seas and attained their maximum species diversity at that time.The most impressive representatives of this order could grow up to 3 m long, while Balteurypterus tetragonophtalmus only reached a few modest centimetres. The large group of eurypterids possessed a fin-like, powerful last pair of legs. They had two respiratory systems - book gills and gill plates - and trace fossils show that they were quite capable of walking on land. Unfortunately, they didn't quite make the leap, because like their close relatives, the horseshoe crabs, they used the tips of their legs to chew, which is much more efficient underwater than on land. Fish also increasingly competed with them in the sea, so that they retreated to the river systems. By the Permian, there were only a few species of these presumably largest known arthropods of all time.Colors on product photos may differ from those of the original specimen for technical reasons.

One cephala and several thorax segments of Balteurypterus tetragonophtalmus.Age: Silurian, Bagovitsa Fm;Locality: Smotrych (left tributary of the Dniester), near Kamjanez-Podilskyj, Khmelnytskyi oblast, UkraineSize head: 2,5 x 2 cmSize matrix: approx. 11 x 4 x 1,8 cmEurypterids, also known as sea scorpions because of their pointed tails, evolved in the Ordovician. They were the dominant predators of the Upper Ordovician, Silurian and Lower Devonian seas and attained their maximum species diversity at that time.The most impressive representatives of this order could grow up to 3 m long, while Balteurypterus tetragonophtalmus only reached a few modest centimetres. The large group of eurypterids possessed a fin-like, powerful last pair of legs. They had two respiratory systems - book gills and gill plates - and trace fossils show that they were quite capable of walking on land. Unfortunately, they didn't quite make the leap, because like their close relatives, the horseshoe crabs, they used the tips of their legs to chew, which is much more efficient underwater than on land. Fish also increasingly competed with them in the sea, so that they retreated to the river systems. By the Permian, there were only a few species of these presumably largest known arthropods of all time.Colors on product photos may differ from those of the original specimen for technical reasons.

Historical microscope slide with retiolid graptolite.Isolated, so the structures are perfectly visible. A unique piece!Age: Upper Silurian, Ludlow; Locality: Northern glacial till, Berlin-Spandau, Havelland/Berlin, GermanyDue to technical reasons, colors on photos may differ slightly from those of the original specimen.