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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

Reticulograptus variansAD, Kraft (1982) JK5036
Reticulograptus variansKraft (1982), Pl. 10, fig. 4 MŠ7118
Reticulograptus varians MŠ7143
Reticulograptus varians MŠ7005
Reticulograptus varians MŠ7096
Reticulograptus variansAD, Kraft (1982) JK5057
Reticulograptus variansAD, Kraft (1982) JK5039
Reticulograptus variansKraft (1982), Pl. 10, fig. 2, 3 MŠ7088
Reticulograptus varians MŠ7116
Reticulograptus variansAD, Kraft (1982) JK5005
Reticulograptus varians MŠ7045
Reticulograptus variansKraft (1982), Pl. 10, fig. 2, 3 MŠ7077
Retiolites angustidensAD, Loydell, Štorch a Bates (1997) BB689
Retiolites angustidensAD, Loydell et al. (1997) PŠ709
Retiolites angustidensAD, Loydell, Štorch a Bates (1997) BB686
Retiolites angustidens p5243
Retiolites angustidensAD, Loydell et al. (1997) PŠ700
Retiolites angustidensAD, Loydell et al. (1997), BB687
Retiolites angustidens BB684
Retiolites angustidensAD, Loydell et al. (1997) BB692

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