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

Bohemograptus garratti		PŠ649
Bohemograptus garratti		PŠ675
Bohemograptus garratti		PŠ664
Bohemograptus garratti		PŠ639
Bohemograptus garratti		PŠ656
Bohemograptus garratti		YA2832
Bohemograptus garratti	Štorch (1995), fig. 3F; Pl. I, fig. 6	PŠ607
Bohemograptus garratti		PŠ644
Bohemograptus garratti	Štorch (1995), fig. 3L, Pl. I, fig. 3 (PŠ 673/1); fig. 3E (PŠ 673/2)	PŠ673
Bohemograptus garratti	?torch (1995), Fig. 3B; Pl. 1, fig. 2	PŠ672
Bohemograptus praecornurtus	Štorch (1995), Fig. 4G	PŠ628
Bohemograptus praecornurtus	Štorch (1995) fig. 3l	PŠ622
Bohemograptus praecornurtus		PŠ652
Bohemograptus praecornurtus	Štorch (1995), Fig. 6E, Pl. 1, fig. 4	PŠ643
Bohemograptus praecornurtus		PŠ659
Bohemograptus praecornurtus		PŠ633
Bohemograptus praecornurtus		PŠ683
Bohemograptus praecornurtus		PŠ645
Bohemograptus praecornurtus	Štorch (1995), fig. 4E; Pl. II, fig. 7 (PŠ 641/2)	PŠ641
Bohemograptus praecornurtus		PŠ665

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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]