Graptolithina

Graptolithina is the a class in the animal phylum Hemichordata, the members of which are known as Graptolites. Graptolites are fossil colonial animals known chiefly from the Upper Cambrian through the Lower Carboniferous (Mississippian). A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. The name graptolite comes from the Greek graptos, meaning "written", and lithos, meaning "rock", as many graptolite fossils resemble hieroglyphs written on the rock. Linnaeus originally regarded them as 'pictures resembling fossils rather than true fossils', though later workers, supposed them to be related to the hydrozoans.[citation needed] More recent work places them near the pterobranchs, possibly within.

Sources: http://en.wikipedia.org/wiki/Graptolite

On-line reference: Benton a Harper: Introduction to the Paleobiology

Zdroj: Benton a Harper: Introduction to the Paleobiology

Corymbograptus v-similis	Bouček (1973), Pl. VII, fig. 1, 2, text. fig. 15	BB53
Corymbograptus v-similis		BB323
Corymbograptus v-similis		XA774
Cryptograptus	Bouček (1973), Pl. XXII, fig. 8	BB163
Cryptograptus tricornis	Bouček (1973), Pl. XXIII, fig. 5	BB160
Cryptograptus tricornis	Bouček (1973), Pl. XXIII, fig. 3	BB161
Cryptograptus tricornis	Bouček (1973), Pl. XXIII, fig. 2	BB159
Cryptograptus tricornis		BB286
Cryptograptus tricornis		BB284
Cryptograptus tricornis	Bouček (1973), Pl. XXIII, fig. 4	BB158
Cryptograptus tricornis		BB283
Cryptograptus tricornis		BB285
Cryptograptus tricornis	Bouček (1973), Pl. XXIII, fig. 1	BB162
Cuculograptus		p4530
Cultellograptus cultellus (Törnquist, 1881)		BB6984
Cultellograptus cultellus (Törnquist, 1881)		BB6981
Cultellograptus cultellus (Törnquist, 1881)		BB6983
Cultellograptus cultellus (Törnquist, 1881)		BB6982
Cyclograptus scharyianus		p1371
Cyclograptus scharyianus		JH108

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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]