Trilobites:
Trilobites were arthropods that mainly lived on or in the bottoms of the oceans, although
some species probably swam around in the middle water layers. They evolved in the Cambrian
and became extinct in the Permian. More than 15,000 different species are known, varying
in length from 1 mm (0.04 in) to more than 60 cm (2 ft). They are called trilobites
because their body, lengthwise, consists of three lobes. Widthwise we can also clearly
distinguish three parts: the head (cephalon), the middle part (thorax), and the tail
(pygidium). Just like modern arthropods such as crabs and lobsters, trilobites threw off
their external chitin carapace (the so-called exoskeleton) when it became too small, after
which they grew a newer, bigger one. A lot of trilobite fossils that are found are not the
remains of the actual animal, but are the exoskeletons that, because of their hardness,
fossilized relatively easily. Trilobites had compound eyes (just like modern insects), and
were able to roll themselves up to protect their soft ventral side.
Bibliography:
Système silurien du centre de la Bohême. Vol. I, Recherches paléontologiques I:
Trilobites, J. Barrande, 1852, Czech National Museum (Prague, Czech Rep.)
Trilobites, R. Levi-Setti, 1984 (2nd ed.), University of Chicago Press
(Chicago, US)
Bohemian trilobites, M. Snajdr, 1990, Czech National Museum (Prague, Czech Rep.)
Trilobites: Fossils Illustrated, vol. 2, H.B. Whittington, 1992, Boydell Press (Ipswich,
UK)
Trilobite! Eyewitness to evolution, R. Fortey, 2001, Flamingo Publ. (London, UK)
Trilobites of New York, T.E. Whiteley, 2002, Cornell University Press (Ithaca, US)
a copy/paste of the photo URL into your browser.
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Selenopeltis inermis inermis #SI5911 Very rare Trilobite in excellent condition Upper Ordovician (Caradocian), 455 million years old Trubin, Czech Republic Size body: 1.4 inch / 3.5 cm Price: Euro  |
| Actinopeltis insouclis #AI5912 1 Complete and 2 incomplete specimen Upper Ordovician (Ashgill) , 450 million years old Formation Kraluv Dur Levin, Czech Republic Size biggest: 0.88 inch / 2.2 cm Price: Euro |
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| Above nice eye | Klouseckia ruderalis #KR5914 Ancestor of the Phacops Upper Ordovician (Ashgill) , 450 million years old Formation Kraluv Dur Levin, Czech Republic Size : 0.68 inch / 1.7 cm Price: Euro |
| Miraspis mira
#MM5915 Extreme beauty very rare, with a Leonaspis roemeri as well (not shown on photo) Monograptus flexilus zone Wenlock, Silurian, 426 million years old Liten form., Lodenice, Czech Republic Size body: 0.76 inch / 1.9 cm Price: Euro |
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| Above very nice eye | Klouseckia ruderalis #KR5916 Ancestor of the Phacops, very nice specimen Upper Ordovician (Ashgill) , 450 million years old Formation Kraluv Dur Levin, Czech Republic Size : 1.12 inch / 2.8 cm Price: Euro |
| Liokarpes venulosus #DT5917 Extreme Rare specimen (incomplete) Devonian, Pragian , 410 million years old Homolac, Czech Republic Size : 1 inch / 2.5 cm Price: Euro |
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| Paradoxides gracilis #1650 Pos/Neg specimen, Superb and big specimen Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 6.8 inch / 17 cm Price: Euro |
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| Microparia speciosa #MS0266 With nice Holochroal eyes containing a few hundred lenses and a nice Pigidium Upper Ordovician (Ashgill) , 450 million years old Formation Kraluv Dur Levin, Czech Republic Size : 0.4 inch / 1 cm Price: Euro |
Above negative below detail of the eye |
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| Paradoxides gracilis #PG1648 Pos/Neg specimen Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 6 inch / 15 cm Price: Euro |
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| Paradoxides gracilis #1080 Pos/Neg specimen Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size plate: 8 by 6 inch / 20 by 15cm Size trilo.: 4.4 inch / 11 cm Price: Euro |
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Naraoia longicaudata #AI430 RARE Soft Bodied Trilobite, showing Internal organs M. Cambrian, 525 million years old Chengjiang, China Size : 0.2 inch / 0.5 cm Price: Euro |
| Emuella dalganoi #AI459 RARE, Old Collection L. Cambrian, 540 million years old Kangaroo Island, South Australia Size : 0.36 inch / 0.9 cm Price: Euro |
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Emuella polymera #AI460 RARE, Old Collection, pos/neg L. Cambrian, 540 million years old Kangaroo Island, South Australia Size : 0.68 inch / 1.7 cm Price: Euro |
| Paradoxides gracilis #1083 Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size plate: 11.2 by 9.2 inch / 28 by 23 cm Size trilo.: 5.8 inch / 14.5 cm Price: Euro |
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Paradoxides gracilis #1084 Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size plate: 6.8 by 6.4 inch / 17 by 16 cm Size trilo.: 3.4 inch / 8.5 cm Price: Euro |
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Trinucleoides reussi #1096 Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 0.52 inch / 1.3 cm Price: Euro |
| Placoparia zippei #1097 Ordovician, 530 million years old Sarka, Prague, Czech Republic Size nodule.: 1 by 1.2 inch / 2.5 by 3 cm Price: Euro |
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Ectillaenus sarkaensis #1202 Pos/Neg Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 1.8 inch / 4.5 cm Price: Euro |
| Ectillaenus sarkaensis #1205 Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 1 inch / 2.5 cm Price: Euro |
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| Acanthalomina minuta #1217 6 Specimen Silurian, 420 million years old Kosov, Czech Republic Size biggest trilo.: 0.24 inch / 0.6 cm Price: Euro |
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| Conocoryphe sulzeri #1221 Middle Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 1.6 inch / 4 cm Price: Euro |
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Conocoryphe sulzeri #1222 Middle Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 1.52 inch / 3.8 cm Price: Euro |
| Paradoxides gracilis #1223 4 specimen Middle Cambrian, 530 million years old Jince, Czech Republic Size biggest trilo.: 1.04 inch / 2.6 cm Size matrix: 4.8 by 5.2 inch / 12 by 13 cm Price: Euro |
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Placoparia zippei #1224 Pos/Neg Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 1.28 inch / 3.2 cm Price: Euro |
| Placoparia zippei #1225 Pos/Neg Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 0.88 inch / 2.2 cm Price: Euro |
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Conocoryphe cirina #1231 Middle Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 1.72 inch / 4.3 cm Price: Euro |
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Ectillaenus katzeri #1241 Pos/Neg Ordovician, 450 million years old Osek, Czech Republic Size trilo.: 1.4 inch / 3.5 cm Price: Euro |
| Aulacopleura konincki
#819 On small matrix plate Wenlock, Silurian, 426 million years old Liten form., Lodenice, Czech Republic Size trilo.: 0.88 inch / 2.2 cm Price: Euro |
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| Placoparia zippei #634 Sarka formation Llanvirn, Ordovician, 475 million years old Rokycany, Czech Republic Size trilo.: 1.2 inch / 3 cm Price: Euro |
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| Conocoryphe robusta #636 Very Rare but incomplete Ornamentaspis – Conocoryphe Zone like the Spanish Conocoryphe ovata Zone The most lower part of the Middle Cambrian, 545 million years old Jince, Czech Republic Size biggest trilo.: 1.92 inch / 4.8 cm Price: Euro |
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| Trinueleoides reussi #644 Rare Ordovician, 475 million years old Myto, Czech Republic Size trilo.: 0.64 inch / 1.6 cm Price: Euro |
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Odontopleura ovata #647 Wenlock, Silurian, 426 million years old Lodenice, Czech Republic Size trilo.: 0.32 inch / 0.9 cm Price: Euro |
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Conocoryphe robusta #649 Ornamentaspis – Conocoryphe Zone like the Spanish Conocoryphe ovata Zone The most lower part of the Middle Cambrian, 545 million years old M.Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 1.6 inch / 4 cm Price: Euro |
| Trinucleoides reussi #378 Rare, pos/neg, Sarka Formation Llanvirn Ordovician, 475 million years old Myto, Czech Republic Size trilo.: 0.6 inch / 1.5 cm Price: Euro |
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| Conocoryphe sulzeri #80 Middle Cambrian. 530 million years old Jince, Czech Republic. Size plate: 4.3 by 3.75 inch / 11 by 9 cm Size trilo.: 1.8 inch / 4.5 cm Price: Euro |
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Paradoxides gracilis #390 With free cheeks, 7 specimen on biggest plate Pos/neg, rare. Middle Cambrian, 530 million years old Jince, Czech Republic Size big plate: 6 by 5.2 inch / 15 by 13 cm Size trilo: 2.4 inch / 6 cm Price: Euro |
| Paradoxides gracilis #391 With free cheeks Middle Cambrian, 530 million years old Jince, Czech Republic Size plate: 8 by 4.8 inch / 20 by 12 cm Size trilo: 5 inch / 12.5 cm Price: Euro 2 |
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Aulacopleura
konincki #284 |
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| Odontopleura ovata #307 Rare Wenlock, Silurian, 426 million years old Liten form., Lodenice, Czech Republic Size trilo.: 0.28 inch / 0.7 cm Price: Euro |
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| Aulacopleura konincki
#82 M.Silurian. 428 Million years old Cernidla near Lodenice, Czech Republic Size plate: 1.75 by 1.75 inch / 4 by 4 cm Size trilo.: 0.4 inch / 0.9 cm Price: Euro |
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| Aulacopleura konincki
#84 M.Silurian. 428 Million years old Cernidla near Lodenice, Czech Republic Size plate: 2 by 1.75 inch / 5 by 4 cm Size trilo.: 0.5 inch / 1.2 cm Price: Euro |
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Aulacopleura konincki
#85 M.Silurian. 428 Million years old Cernidla near Lodenice, Czech Republic Size plate: 2.8 by 2 inch / 7 by 5 cm Size trilo.: 0.8 inch / 2 cm Price: Euro |
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Raphiophorus
rouaulti #321 Silurian, 426 million years old Liten form, Jarov, Czech Republic Size trilo.: 0.4 inch / 1 cm Price: Euro |
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