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

Reticulograptus varians	Kraft (1982), Pl. 10, fig. 2, 3	MŠ7077
Reticulograptus varians		MŠ6051
Reticulograptus varians		MŠ7116
Reticulograptus varians		MŠ7096
Reticulograptus varians	AD, Kraft (1982)	JK5005
Reticulograptus varians	Kraft (1982), Pl. 10, fig. 4	MŠ7118
Retiolites angustidens		p5243
Retiolites angustidens	AD, Loydell et al. (1997),	BB687
Retiolites angustidens	AD, Loydell, Štorch a Bates (1997)	BB686
Retiolites angustidens	AD, Loydell et al. (1997)	PŠ700
Retiolites angustidens	AD, Loydell et al. (1997)	PŠ709
Retiolites angustidens	AD, Loydell, Štorch a Bates (1997)	BB689
Retiolites angustidens		BB684
Retiolites angustidens	AD, Loydell et al. (1997)	BB692
Retiolites angustidens	AD, Loydell et al. (1997)	PŠ705
Retiolites geinitzianus		JH112
Retiolites geinitzianus		JH104
Retiolites geinitzianus	AD, Loydell et al. (1997)	PŠ704
Retiolites geinitzianus	AD, Loydell et al. (1997)	PŠ703
Retiolites geinitzianus	AD, Loydell et al. (1997)	PŠ687

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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]