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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

Monograptus bouceki HJ24
Monograptus bouceki HJ26
Monograptus bouceki SM151
Monograptus branikensis HJ42
Monograptus branikensis HJ50
Monograptus branikensis HJ53
Monograptus branikensis HJ51
Monograptus branikensis HJ52
Monograptus branikensis HJ47
Monograptus branikensis HJ48
Monograptus branikensis HJ46
Monograptus branikensisJaeger (1986), Pl. 1, fig. 14 HJ55
Monograptus branikensisJaeger (1986), Pl. 1, fig. 10, text-fig. 13 HJ54
Monograptus branikensis HJ43
Monograptus branikensis HJ41
Monograptus branikensis HJ40
Monograptus branikensisJaeger (1986), Pl. 1, fig. 12 HJ56
Monograptus branikensis HJ45
Monograptus branikensis HJ49
Monograptus branikensis HJ44
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]