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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| 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 180.-- |
Above negative below detail of the eye |
| Acanthalomina minuta #AM0136 Pos/Neg Silurian, 420 million years old Kosov, Czech Republic Size : 0.44 inch / 1.1 cm Price: Euro 45.-- |
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| Acanthalomina minuta #AM0138 Pos/Neg Silurian, 420 million years old Kosov, Czech Republic Size : 0.28 inch / 0.7 cm Price: Euro 45.-- |
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Acanthalomina minuta #AM0139 Multiple specimen Silurian, 420 million years old Kosov, Czech Republic Size : 0.28 inch / 0.7 cm Price: Euro 40.-- |
| Acanthalomina minuta #AM0140 Pos/Neg Silurian, 420 million years old Kosov, Czech Republic Size : 0.44 inch / 1.1 cm Price: Euro 45.-- |
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Acanthalomina minuta #AM0141 Pos/Neg Silurian, 420 million years old Kosov, Czech Republic Size : 0.4 inch / 1 cm Price: Euro  |
| Acanthalomina minuta #AM0142 multiple specimen Silurian, 420 million years old Kosov, Czech Republic Size : 0.36 inch / 0.9 cm Price: Euro 40.-- |
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| Paradoxides gracilis (2) #1698 and Stromatocystites pentagularis Pos/Neg specimen, Nice specimen Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size centre trilo.: 6.8 inch / 13.5 cm Size matrix.: 13.2-5.2 & 10.8-6 inch / 33-13 & 27-15cm 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 630.-- |
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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 360.-- |
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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 170.-- |
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Paradoxides gracilis #1082 Paradoxides gracilis zone Middle Cambrian, 530 million years old Jince, Czech Republic Size plate: 7.2 by 8.8 inch / 18 by 22 cm Size trilo.: 5.2 inch / 13 cm Price: Euro 235.-- |
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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 110.-- |
| 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 230.-- |
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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 260.-- |
| Balcoracania dailyi #AI461 RARE, Old Collection L. Cambrian, 540 million years old Kangaroo Island, South Australia Size : 0.28 inch / 0.7 cm Price: Euro |
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| 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 325.-- |
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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 130.-- |
| Raphiophorus roualti #1089 Pos/Neg Silurian, 420 million years old Kosov, Czech Republic Size trilo.: 0.44 inch / 1.1 cm Price: Euro 75.-- ON HOLD |
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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 45.-- |
| 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 48.-- |
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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 160.-- |
| Ectillaenus sarkaensis #1205 Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 1 inch / 2.5 cm Price: Euro 48.-- |
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| Reedops bronni #1207 Devonian, 390 million years old Damil U Tetina, Czech Republic Size trilo.: 1 by 1.08 inch / 2.5 by 2.7cm Price: Euro |
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Conocoryphe sulzeri #1214 Middle Cambrian, 530 million years old Jince, Czech Republic Size trilo.: 2.08 inch / 5.2 cm Size matrix: 6 by 4 inch / 15 by 10 cm Price: Euro 115.-- |
| Acanthalomina minuta #1217 6 Specimen Silurian, 420 million years old Kosov, Czech Republic Size biggest trilo.: 0.24 inch / 0.6 cm Price: Euro 72.-- |
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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 64.-- |
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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 72.-- |
| 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 96.-- |
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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 45.-- |
| Placoparia zippei #1225 Pos/Neg Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 0.88 inch / 2.2 cm Price: Euro 48.-- |
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Placoparia zippei #1226 Pos/Neg Ordovician, 450 million years old Sarka, Prague, Czech Republic Size trilo.: 0.96 inch / 2.4 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 52.-- |
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Otarion diffractum #1233 Silurian, 420 million years old Kosov, Czech Republic Size trilo.: 0.76 inch / 1.9 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 80.-- |