Trilobites
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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)

For a larger image please click on the photo!
Ellipsocephalus hoffi  #TEH9961
Matrix 11 by 8 cm
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 0.96 inch / 2.4 cm
Price:  Euro 25.--
Paradoxides gracilis  #TEH9962
Pos/Neg. Rare  Matrix 14 by 4 cm
Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 0.88 inch / 2.2 cm
Price:  Euro 90.--
Ellipsocephalus hoffi  #TEH9963
Pos/Neg. Matrix 15 by 6 cm
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 0.72 inch / 1.8 cm
Price:  Euro 40.--
Ellipsocephalus hoffi  #TEH9964
Pos/Neg. Matrix 11 by 18 cm
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 0.72 inch / 1.8 cm
Price:  Euro 80.--
Hydrocephalus minor minor  #THM9161
partial Pos/Neg. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 3.4 inch / 8.5 cm
Price:  Euro 90.--
Hydrocephalus minor minor  #THM9162
partial. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 2.8 inch / 7 cm
Price:  Euro 45.--
Hydrocephalus minor minor  #THM9163
partial . Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 4 inch / 10 cm
Price:  Euro 90.--
Hydrocephalus minor minor  #THM9164
partial. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 4.2 inch / 10.5 cm
Price:  Euro 
Hydrocephalus minor minor  #THM9165
partial Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 2.2 inch / 5.5 cm
Price:  Euro 40.--
Hydrocephalus minor minor  #THM9166
partial.  Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 2.8 inch / 7 cm
Price:  Euro 45.--
Hydrocephalus minor minor  #THM9167
partial. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 2 inch / 5 cm
Price:  Euro 40.--
Hydrocephalus minor minor  #THM9168
partial. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 3.6 inch / 9 cm
Price:  Euro 50.--
Hydrocephalus minor minor  #THM9169
partial. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 5.2 inch / 13 cm
Price:  Euro 50.--
Paradoxides gracilis #TPG9170
partial Rare. Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 3.6 inch / 9 cm
Price:  Euro 45.--
Paradoxides gracilis #TPG9171
partial Rare. Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 4.4 inch / 11 cm
Price:  Euro 60.--
Paradoxides gracilis #TPG9172
partial Rare. Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 4.4 inch / 11 cm
Price:  Euro 80.--
Paradoxides gracilis #TPG9173
partial Rare. Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 2.8 inch / 7 cm
Price:  Euro 45.--
Phacops africanus #TPR9063
NO restoration
Devonian, 380 million years old
Alnif, Morocco
Size trilo.: 5.2 inch / 13 cm
Price: Euro 120.--
 
Hydrocephalus minor minor #705
3 big Hydrocephalus specimen on 1 plate RARE
Onymagnostus hybridus Zone
M.Cambrian, 530 million years old
Jince, Czech Republic
Size trilos: 4 + 3.6 + 3.6 inch / 10 + 9 + 9 cm
Size plate: 9.2 by 8.4 inch / 23 by 21 cm
Price:  Euro 
Paradoxides gracilis #TPG7841
1 - 2% repair on cracks
Rare. Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 4.8 inch / 12 cm
Price:  Euro 
Concocoryphe cirina #TCC7765
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.68 inch / 4.2 cm
Price: Euro 80.--
788.jpg (11953 bytes) Concoryphe sulzeri #788
Paradoxides gracilis zone, 2 specimen
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size plate: 7 by 3 inch / 17.5 by 7.5 cm
Size trilo.: 1.8 inch / 4.5 cm
Price: Euro 
Hydrocephalus minor minor  #THM8013
partial Pos/Neg. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 4.8 inch / 12 cm
Price:  Euro 45.--
Hydrocephalus minor minor  #THM8015
Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size: 3.2 inch / 8 cm
Price:  Euro 
Paradoxides gracilis #TPG7837
Rare. Paradoxides gracilis zone
1% repair on cracks
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 5.4 inch / 13.5 cm  (on a 34cm wide matrix)
Price:  Euro 
Paradoxides gracilis #TPG7838
Rare. Paradoxides gracilis zone
1% repair on cracks
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size biggest.: 4.4 inch / 11 cm (on a 30cm wide matrix)
Price:  Euro
Hydrocephalus minor minor  #TPG7842
Rare pos/neg. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size matrix: 7.6 by 6.8 inch / 19 by 17 cm
Price:  Euro 270.--
Hydrocephalus minor minor  #TPG7843
1% repair on cracks
Rare. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 4 inch / 12.5 cm
Price:  Euro 270.--
Paradoxides gracilis #TPG7751
Rare Pos/Neg; Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 3.28 inch / 8.2 cm
Price:  Euro 
Ptychoparia striata #TPS7752
Paradoxides gracilis zone 
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 2.04 inch / 5.1 cm
Price:  Euro 80.--
Concocoryphe cirina #TCC7753
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.64 inch / 4.1 cm
Price: Euro 80.--
Aulacopleura konincki #TAK7754
Wenlock, Silurian, 426 million years old
Lodenice, Czech Republic
Size trilo.: 0.48 inch / 1.2 cm
Price: Euro 25.--
Litavkaspis rejckoviciensis #TLR7755
Middle Cambrian, 530 million years old
Potucek, Czech Republic
Size trilo.: 0.36 inch / 0.9 cm
Price:  Euro 40.--
Conocoryphe robusta #TDS7756
Head
Ornamentaspis – Conocoryphe Zone like the Spanish Conocoryphe ovata Zone
Most lower part of M.Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 1.2 inch / 3 cm
Price: Euro 15.--
Aulacopleura konincki #TAK7758
Wenlock, Silurian, 426 million years old
Lodenice, Czech Republic
Size trilo.: 0.52 inch / 1.3 cm
Price: Euro 15.--
Otarion diffractum   #TOA7759
( Zenker,1833) Kopanina Formation
Upper Silurian, Ludlow, + 426 million years old
Kosov, Czech Republic
Size trilo.: 0.32 inch / 0.8 cm
Price: Euro
10.--
Placoparia zippei #TPZ7761
Ordovician, 450 million years old
Sarka, Prague, Czech Republic
Size trilo.: 0.6 inch / 1.5 cm
Price: Euro 25.--
Concocoryphe cirina #TCC7762
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 2 inch / 5 cm
Price: Euro 85.--
Concocoryphe cirina #TCC7763
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.64 inch / 4.1 cm
Price: Euro 80.--
Concocoryphe cirina #TCC7764
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.84 inch / 4.6 cm
Price: Euro 70.--
Concocoryphe cirina #TCC7766
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 2 inch / 5 cm
Price: Euro 70.--
Concocoryphe cirina #TCC7767
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.8 inch / 4.5 cm
Price: Euro 60.--
Concocoryphe cirina #TCC7768
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.56 inch / 3.9 cm
Price: Euro 80.--
Concocoryphe cirina #TCC7769
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.6 inch / 4 cm
Price: Euro 80.--
Concocoryphe cirina #TCC7770
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size left trilo.: 1.36 inch / 3.4 cm
Price: Euro 80.--
Concoryphe sulzeri #TCS7773
Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 1.52 inch / 3.8 cm
Price: Euro 55.--
Metacrypaheus (Eldredgeia) cf. venustus #TMR7551
(Wolfart) Pos/Neg Nodule Trilobite,
Sicasica formation
M. Devonian, Givetian, 388 million years old
Tikani, Estacion de Bombeo, Dep. Laz Paz, Bolivia
Size: 0.84 inch / 2.1 cm
Price: Euro 
Metacrypaheus (Eldredgeia) cf. venustus #TMR7555
(Wolfart) Pos/Neg Nodule Trilobite,
Sicasica formation
M. Devonian, Givetian, 388 million years old
Tikani, Estacion de Bombeo, Dep. Laz Paz, Bolivia
Size: 1.4 inch / 3 cm
Price: Euro 15.--
Metacrypaheus (Eldredgeia) cf. venustus #TMR7556
(Wolfart) Pos/Neg Nodule Trilobite,
Sicasica formation
M. Devonian, Givetian, 388 million years old
Tikani, Estacion de Bombeo, Dep. Laz Paz, Bolivia
Size: 1.04 inch / 2.6 cm
Price: Euro 15.--
Geesops sparsinodosus gallicus #TVT7302
M. Devonian, 390 million years old
Vireux, France
(Old Collection)
Size: 0.8 inch / 2 cm
Price: Euro 15.--
Paradoxides gracilis #710
Rare Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size plate: 6 by 5.2 inch / 15 by 13 cm
Size   trilo.: 4 inch / 10 cm
Price: Euro
710paradox.jpg (12236 bytes)
Paradoxides gracilis #824
Rare. Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size plate: 4.4 by 5.2 inch / 11 by 13 cm
Size trilo.: 3 inch / 7.5 cm
Price: Euro 145.--
Paradoxides gracilis #821
Rare. Pos/Neg; Paradoxides gracilis zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size biggest plate: 5.6 by 3.6 inch / 14 by 9 cm
Size trilo.: 3.6 inch / 9 cm
Price:  Euro 190.--
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 
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 245.--
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 
Paradoxides gracilis #1083
Rare 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 
Trinucleoides reussi #1096
Ordovician, 450 million years old
Sarka, Prague, Czech Republic
Size trilo.: 0.52 inch / 1.3 cm
Price: Euro 35.--
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 35.--
Ectillaenus sarkaensis #1205
Ordovician, 450 million years old
Sarka, Prague, Czech Republic
Size trilo.: 1 inch / 2.5 cm
Price: Euro 35.--
Acanthalomina minuta #1217
6 Specimen
Silurian
, 420 million years old
Kosov, Czech Republic
Size biggest trilo.: 0.24 inch / 0.6 cm
Price: Euro 55.--
Conocoryphe sulzeri #1221
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 1.6 inch / 4 cm
Price: Euro 45.--
Placoparia zippei #1224
Pos/Neg
Ordovician, 450 million years old
Sarka, Prague, Czech Republic
Size trilo.: 1.28 inch / 3.2 cm
Price: Euro 35.--
Conocoryphe cirina #1231
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 1.72 inch / 4.3 cm
Price: Euro 40.--
Ectillaenus katzeri #1241
Pos/Neg
Ordovician, 450 million years old
Osek, Czech Republic
Size trilo.: 1.4 inch / 3.5 cm
Price: Euro 65.--
Placoparia zippei #634
Sarka formation
Llanvirn, Ordovician, 475 million years old
Rokycany, Czech Republic
Size trilo.: 1.2 inch / 3 cm
Price: Euro 25.--
634placoparia.jpg (11728 bytes)
Trinueleoides reussi #644
Rare
Ordovician, 475 million years old
Myto, Czech Republic
Size trilo.: 0.64 inch / 1.6 cm
Price: Euro 40.--
644trinueleoides.jpg (11340 bytes)
647odontopleura.jpg (11283 bytes) Odontopleura ovata #647
Wenlock, Silurian, 426 million years old
Lodenice, Czech Republic
Size trilo.: 0.32 inch / 0.9 cm
Price: Euro 25.--
649conoco.jpg (11665 bytes) Conocoryphe robusta #649
Ornamentaspis – Conocoryphe Zone like the Spanish Conocoryphe ovata Zone
The most lower part of the
M.Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 1.6 inch / 4 cm
Price: Euro 40.--
Conocoryphe sulzeri #80
Middle Cambrian. 530 million years old
Jince, Czech Republic.
Size trilo.: 1.8 inch / 4.5 cm
Price: Euro
25.--

080 Conocoryphe.jpg (15575 bytes)

Hydrocephalus minor minor #924
Rare. Onymagnostus hybridus zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size plate: 7.2 by 3.6 inch / 18 by 9 cm
Size trilo.: 4.8 inch / 12 cm
Price: Euro 165.--
Conocoryphe sulzeri #925
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size plate: 6 by 4 inch / 15 by 10 cm
Size left trilo.: 1.4 inch / 3.5 cm
Price: Euro 145.--
Concocoryphe cirina #930
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size plate: 4 by 3.6 inch / 10 by 9 cm
Size left trilo.: 1.4 inch / 3.5 cm
Price: Euro
Ellipsocephalus vetustus #937
Middle Cambrian, 530 million years old
Rejkovice, Czech Republic
Size trilo.: 0.8 inch / 2 cm
Price: Euro 25.--
Eccaparadoxides puslius #938
Middle Cambrian, 530 million years old
Potucek, Czech Republic
Size trilo.: 1 inch / 2.5 cm
Price:  Euro 110.--
Conocoryphe sulzeri   #725
Paradoxides gracilis Zone
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 3.8 inch / 7 cm
Price: Euro 25.--
725conocoryphe.jpg (11885 bytes)
Aulacopleura konincki #601
Wenlock, Silurian, 426 million years old
Lodenice, Czech Republic
Size trilo.: 0.72 inch / 1.8 cm
Price: Euro 25.--
601aula.jpg (11786 bytes)
Aulacopleura konincki #609
Several specimen
Wenlock, Silurian, 426 million years old
Lodenice, Czech Republic
Size trilo.: 0.24 inch / 0.6 cm
Price: Euro 15.--
609aula.jpg (9652 bytes)
Cyrtoproetus moravicus #781
Extreme Rare
specimen
Carboniferous (Kulm), 325 million years old
Cermna, Moravia, Czech Republic
Size trilo.: 0.76 inch / 1.9 cm
Price: Euro 155.--

781new.jpg (105796 bytes)

782newb.jpg (93069 bytes) Phillibole aequalis #782
Extreme Rare
specimen
Carboniferous (Kulm), 325 million years old
Zaluzne, Czech Republic
Size trilo.: 1.56 inch / 3.9 cm
Price: Euro 175.--
786.jpg (12166 bytes) Ptychoparia striata #786
Paradoxides gracilis zone Nice specimen
Middle Cambrian, 530 million years old
Jince, Czech Republic
Size trilo.: 1.88 inch / 4.7 cm
Price:  Euro 
Colpocoryphe bohemica #789
Rare
Ordovician, Sarka form, 460 million years old
Osek, Czech Republic
Size trilo.: 1.72 inch / 4.3 cm
Price: Euro 65.--
789.jpg (11341 bytes)
Otarion diffractum  ( Zenker,1833) nr. 747
Kopanina Formation
Upper Silurian, Ludlow, + 426 million years old
Kosov, Czech Republic
Size trilo.: 0.36 inch / 0,9 cm
Price: Euro
15.--
714conocoryphe.jpg (12165 bytes) Conocoryphe robusta #714
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 plate: 4 by 8.4 inch / 10 by 21 cm
Size   trilo.: 3.6 inch / 9 cm
Price: Euro 95.--