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

Expansograptus extensus	Bouček (1973), text. fig. 10 f	BB25
Expansograptus extensus	Bouček (1973), text. fig. 10a	BB33
Expansograptus extensus	Bouček (1973), text. fig. 10 h	BB26
Expansograptus ferrugineus	Bouček (1973), text. fig. 13d	BB43
Expansograptus ferrugineus		BB200
Expansograptus ferrugineus	Bouček (1973), Pl. VI, fig. 9, text. fig. 13 c	BB42
Expansograptus ferrugineus	Bouček (1973), text. fig. 13f	BB44
Expansograptus ferrugineus		BB201
Expansograptus ferrugineus	Bouček (1973), text. fig. 13a, b	BB41
Expansograptus hudlicensis	Bouček (1973), text. fig. 14b	BB47
Expansograptus hudlicensis		BB315
Expansograptus hudlicensis	Bouček (1973), text. fig 14c, Pl. VI, fig. 3	BB48
Expansograptus hudlicensis	Bouček (1973), Pl. VI, fig. 4, text. fig. 14d	BB49
Expansograptus hudlicensis	Bouček (1973), text. fig. 14a, Pl. VI, fig. 1, 2	BB46
Expansograptus simulans	Bouček (1973), text. fig. 12 e	BB39
Expansograptus simulans	Bouček (1973), text. fig. 12c, d	BB38
Expansograptus simulans	Bouček (1973), text. fig. 12b	BB37
Expansograptus simulans	Bouček (1973), text. fig. 12a	BB36
Expansograptus simulans	Bouček (1973), Pl. V, fig. 6	BB35
Expansograptus simulans		BB349

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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]