Trilobite Fossils from Russia

All fossils here were posted on the web and come from Russia (about 500 mya). The trilobites from Russia are typically preserved with a caramel-colored calcite shell in white limestone. These triobiltes are typically known for their periscope eyestalks, a possible remarkable adaptation to increasing turbidity during the Ordovician. One thought is that the trilobite, buried in the bottom sediment, may have lain in wait for prey with only its periscope eyestalks protruding through the top of the silt. Click the photo to enlarge.

Middle Ordovician Found in: Wolchow River region near Saint Petersburg, Russia Species: Asaphus kotlukovi Dimensions: Ventral: 45 mm long by 30 mm wide Dorsal: 72 mm long by 48 mm wide on a 175 by 190 mm matrix

Middle Ordovician about 500 million years old (Asery level) Found in: near Saint Petersburg, Russia Species: Asaphus kowalewski Dimensions: 3.3 inches long and 1.8 inches wide, 1.1 inch tall eye stalks, on a 5 by 7 inch matrix

Middle Ordovician Period (Asery level) Found in: Vilpovitsy quarry, Saint Petersburg Region, Russia Species: Asaphus kowalewskii Dimensions: The trilobite measures approx. 2 1/2" (6.3 cm) in length and rests enrolled in matrix

Middle Ordovician about 500 million years old (Asery Horizon) Found in: Asery Horizon deposits of the Wolchow River region near Saint Petersburg, Russia Species: Asaphus kowalewskii Dimensions: (25.4mm=1 inch): 75 mm long by 40 mm wide (the Endoceras is 75 mm long by 25 mm wide) on a 213 by 113 mm matrix

Middle Ordovician about 500 million years old (Asery Horizon) Found in: Middle Ordovician deposits near Wolchow River Region, St Petersburg, Russia Species: Asaphus knyrkois Dimensions: (25.4mm=1 inch): 68 mm long by 51 mm wide on a 85 by 115 mm matrix

Early Ordovician 500 million years old (Volhovian level) Found in: Lower Ordovician deposits near St Petersburg, Russia Species: Asaphus lepidurus Dimensions: 2 inches long on a 3 inch by 4 inch limestone matrix with a large, beautiful brachiopod

Lower Ordovician about 500 million years old (Volhovian level) Found in: Lower Ordovician deposits near St Petersburg, Russia Species: Asaphus lepidurus Dimensions: 2.75 inches long on a 3 by 4 inch limestone matrix

Middle Ordovician about 500 million years old (Asery level) Found in: Russia Species: Asaphus plautini Dimensions: 3 inches long on a 4 by 6 inch limestone matrix

Middle Ordovician about 500 million years old (Asery horizon) Found in: Wolchow River Region, St Petersburg, Russia Species: This is Asaphus pseudoplatyurus, a name derived from its strong resemblance to Asaphus platyurus, another trilobite with dramatic genal spines. Dimensions: 45 mm long by 45 mm wide on a 45 by 70 mm matrix

Middle Ordovician Period (Asery level) Found in: Vilpovitsy quarry, Saint Petersburg Region, Russia Species: Asaphus punctatus Dimensions: The trilobite measures approx. 3 7/8" (9.9 cm) in length and rests in matrix

Middle Ordovician about 500 million years old Found in: Middle Ordovician deposits near St Petersburg, Russia Species: Asaphus punctatus Dimensions: Both are 3.2 inches long, a very healthy size for the species, on their 6 by 7 inch limestone matrix

Middle Ordovician Found in: near St Petersburg, Russia Species: Asaphus punctatus (smaller trilobite), Asaphus cornutus (larger trilobite) and a cystoid Dimensions: The punctatus is 3.2 inches and the cornutus is 3.6 inches long, on an 8 by 10 inch matrix

Lower Ordovician 500 million years old (Kunda level) Found in: Lower Ordovician Kunda Level deposits of the Wolchow River region near Saint Petersburg, Russia Species: Asaphus Raniceps Dimensions: 2.2 inches long (measured along the curve) and 1.3 inches wide at the widest extent of the cephalon, resting on a 3.6 inch by 1.7 inch matrix

Early Ordovician over 500 million years old Found in: St Petersburg, Russia Species: Boedaspis ensifer (also known as Acidaspis kuckersiana Schmidt) Dimensions: It measures 2.2" in length including the pleural spines

Middle Ordovician about 500 million years old (Asery level) Found in: Wolchow River region near Saint Petersburg, Russia Species: Boedaspis ensifer - The genus was formerly assigned as Acidaspis, another quite bizarre creature, but the current name was given to similar material in 1968. Dimensions: 3 inches long, 2.5 inches wide; The matrix itself is 5.5 inches long, 5.2 inches across

Devonian period over 500 million years old Found in: Russia Species: Chasmops Dimensions: It measures 2" in length

Middle Ordovician about 500 million years old (Asery level) Found in: Pulitovo Quarry, Wolchow River region, Saint Petersburg, Russia Species: Cheirurus ingricus - very dramatic trilobite, with expansive genal and pygidial spines. This one is in a prone position. Dimensions: 105 mm long by 65 mm wide on a 210 mm by 125 mm matrix

Middle Ordovician about 500 million years old (Asery level) Found in: Asery Horizon, St. Petersburg region, Wolchow river, Russia Species: Dysplanus sp. - related to Illaenus having a similar high profile of the cephalon, presumably a feature that allowed it to plow the substrate looking for a meal. One of the most obvious differences is that Displanus has 9 thoracic segments rather than the 10 of Illaenus. Dimensions: 1.6 inches long (measured along the curve) and 0.9 inches wide at the genal spines, on a 2.5 by 4.2 inch matrix

Ordovician 470 million years old Found in: Asery level, St. Petersburg region, Wolchow river, Russia Species: Hoplolichas plautini Dimensions: It measures 2.25" in length

Devonian period over 500 million years old Found in: Russia Species: Hoplolichas plautini (?) Dimensions: It measures 2.2" in length

Middle Ordovician (Asery Horizon) Found in: St. Petersburg region, Wolchow river, Russia Species: Hoplolichas tricuspidatus Dimensions: 50 mm long by 40 mm wide on a 160 by 83 mm matrix

Early Ordovician over 500 million years old Found in: St Petersburg, Russia Species: Illaneus ocolosis (variant) Dimensions: It measures 3" in around the curve.

Middle Ordovician about 500 million years old (Asery level) Found in: Wolchow River Region, St Petersburg, Russia Species: Illaenus tauricornis Dimensions: 57 mm long by 56 mm wide on a 115 by 93 mm matrix

Ordovician, about 500 million years old Found in: Russia Species: Illaneus tauricornus Dimensions: 4.5 inches long and 3 inches wide, on a 4 by 4 inch matrix

Middle Ordovician (Asery Horizon) Found in: Asery Horizon, Wolchow River Region, St Petersburg, Russia Species: Lonchodomas volborthi Dimensions: 40 mm long by 31 mm wide on a 100 by 108 mm matrix

Lower Ordovician (Asery Horizon) Found in: Lower Ordovician Wolchovian Level deposits of the Wolchow River region near Saint Petersburg, Russia Species: Niobe schmidti Dimensions: Ventral: 2.6 inches long (measured along the curve) and 1.3 inches wide at the widest extent of the cephalon, 6 inch by 5.5 inch matrix

Middle Ordovician 470 million years old Found in: Lower Ordovician Wolhovian Level deposits of the Wolchow River region near St Petersburg, Russia Species: Odontopleurid Boedaspis ensifer Dimensions: It measures 3" in length including the pleural spines

Middle Ordovician Found in: Wolchow River region near Saint Petersburg, Russia Species: Panderia tricuetra Dimensions: 17 mm long by 9 mm wide on a 65 by 60 mm matrix

Middle Ordovician (Asery Horizon) Found in: St. Petersburg region, Vilpovitsy Quarry, Russia Species: Pseudosphaerexochus sp. Dimensions: 14 mm long by 10 mm wide on a 160 by 83 mm matrix

Middle Ordovician (Asery Horizon) Found in: St. Petersburg region, Pulitovo Quarry, Wolchow River Region, Russia Species: Remopleurides nanus Dimensions: 21 mm long (including spine) by 12 mm wide on a 63 mm by 40 mm matrix

Middle Ordovician (Asery Horizon) Found in: Wolchow River Region, St Petersburg, Russia Species: Scotoharpes spasskii Dimensions: 40 mm long by 32 mm wide on an 87 by 54 mm matrix

Early Ordovician 500 million years old Found in: Lower Ordovician deposits near St Petersburg, Russia Species: Xenasaphus Dimensions: The slab measures 30" in length with 40 trilobites

Special Thanks to The Virtual Fossil Museum for photos of these wonderful trilobites.

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