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Silurian

Balteurypterus tetragonophtalmus, Silurian; UKR
Balteurypterus tetragonophtalmus, Silurian; UKR
Age: Silurian, Bagovitsa Fm.;Finding region: Smotrych River, Kamjanez-Podilskyj, UkraineSize of head: 2 cmSize of matrix: 6 x 6 x 1 cmEurypterids, also called sea scorpions for their pointy telson, evolved in the Ordovician. They were the apex predators of the upper Ordovician, Silurian and lower Devonian seas, and reached their largest biodiversity during this time. The largest representatives of this order could reach up to 3 meters, while Balteurypterus tetragonophtalmus only was a few modest centimeters long. The Suborder of Eurypterina, to which Eurypterus of course belongs, modified their last pair of legs into swimming paddles. They had two respiratory systems - book gills and Kiemenplatten - and trace fossils indicate that they could go on land. They never fully transitioned, however, probably because like their relatives the horseshoe crabs they chewed with the bases of their legs outside of their mouth, which would have been more efficient underwater than on land. In the seas, fish started outcompeting them, which drove the remaining species into the rivers. In the Permian there were only a few species left, among them the heaviest arthropods to ever exist. During the Permo-Triassic extinction the last members of this group went extinct.The colors on the pictures may differ slightly from the original due to technical reasons.

€22.00

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Balteurypterus tetragonophtalmus, Silurian; UKR
Balteurypterus tetragonophtalmus, Silurian; UKR
Two cephala and several thorax segments of Balteurypterus tetragonophtalmus.Eurypterids, 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. Age: Silurian, Bagovitsa Fm;Locality: Smotrych (left tributary of the Dniester), near Kamjanez-Podilskyj, Khmelnytskyi oblast, UkraineSize head: 1 x 1.3 cmSize matrix: approx. 5 x 7 x 1 cmColors on product photos may differ from those of the original specimen for technical reasons.

€26.00

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Callizoe bohemica, Silurian, CZ
Callizoe bohemica, Silurian, CZ
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.

€35.00

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Cryptolithus ornatus, Lower Silurian; CZE
Cryptolithus ornatus, Lower Silurian; CZE
Beautiful specimen.Seam and spines largely preserved.Age: Lower Silurian;Locality: Trubin, Bohemia, Czech RepublicSize fossil: 2.5 x 3 cm; matrix: 4.5 x 4 cm  Colors on product photos may differ slightly from those of the original specimen for technical reasons.

€145.00

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Cyrtograptus (?), Silurian, GER
Cyrtograptus (?), Silurian, GER
The graptolite Cyrtograptus (?) on a slate.Age: Lower Silurian;Locality: Hohenleuben, Thuringian Forest, GermanySize: approx. 8,3 x 6,2 cmFarben auf den Bildern können von den Farben der Originale technisch bedingt abweichen.

€17.00

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Euomphalotrochus sp., Silurian; GBT
Euomphalotrochus sp., Silurian; GBT
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.

€25.00

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Goniophyllum pyramidale, SWE
Goniophyllum pyramidale, SWE
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.

€35.00

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Halysites, Silurian; Gotland, SWE
Halysites, Silurian; Gotland, SWE
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: 9 x 8,5 x 5,5 cmColors on product photos may differ from those of the original specimen due to technical reasons.

€22.00

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Halysites, Silurian; Gotland, SWE
Halysites, Silurian; Gotland, SWE
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: 7 x 5 x 4,3 cmColors on product photos may differ from those of the original specimen due to technical reasons.

€25.00

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Holoretiolites simplex, rare!, GER
Holoretiolites simplex, rare!, GER
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.

€145.00

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Monograptus chimaera, Upper Silurian; GER
Monograptus chimaera, Upper Silurian; GER
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.

€135.00

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Monograptus gregarius, Silurian; GER
Monograptus gregarius, Silurian; GER
Age: Silurian;Locality: Völkenreuth, Schwarzenbach an der Saale, Upper Franconia, Bavaria, GermanySize cardboard card: 9cm x 6,5cmColors on product photos may differ slightly from those of the original specimen due to technical reasons.

€22.00

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Monograptus jaculum, Silurian; GER
Monograptus jaculum, Silurian; GER
Age: Middle Silurian;Locality: Altmannsgrün, Vogtland, Saxony, GermanySize of cardboard card: 9 x 7cmColors on product photos may differ slightly from those of the original specimen due to technical reasons.

€22.00

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Monograptus subconicus, Silurian; GER
Monograptus subconicus, Silurian; GER
Age: Upper Silurian;Locality: Ronneburg, Main-Kinzig district, Hesse, GermanySize of cardboard card: approx. 8 x 12 cmColors in product photos may differ from those of the original specimen for technical reasons.

€37.00

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Pristiograptus frequens ,Silurian, GER
Pristiograptus frequens ,Silurian, GER
Age: SilurianLocality: Rostock, GermanySize:  Fossils 2,5 cm, Matrix 6,5 x 4 cmThe colours on the pictures may slightly differ from the original specimen.

€16.50

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Scutellum (Bronteus) sp., Silurian, CZE
Scutellum (Bronteus) sp., Silurian, CZE
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.

€50.00

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Scyphocrinites (Camarocrinus) sp., Silurian; CZE
Scyphocrinites (Camarocrinus) sp., Silurian; CZE
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.

€18.00

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Spinograptus spinosus, rare!, GER
Spinograptus spinosus, rare!, GER
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.

€145.00

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Spirograptus spiralis, Silurian; CZE
Spirograptus spiralis, Silurian; CZE
Graptolites Spirograptus spiralis on a slate slab.Age: Silurian;Locality: Prague, administrative district 4 (formerly Hodkovičky), Bohemia, Czech RepublicSize: approx. 3 x 9 cm, Ø graptolite: 1.5 cmColors on pictures may differ from the colors of the original specimen due to technical reasons.

€26.00

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Spirograptus spiralis, Silurian; CZE
Spirograptus spiralis, Silurian; CZE
The graptolites Spirograptus spiralis on a slate of shale.Age: Lower Silurian;Locality: Prague, administrative district 4 (formerly Hodkovičky), Bohemia, Czech RepublicSize: approx. 6,5 x 4,5 x 0,5 cm; Ø graptolite: 1,5 cmColors on pictures may differ from those of the original specimen due to technical reasons.

€28.00

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