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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

Corymbograptus retroflexus maximusAD, 3x precislovany kus (mel i cisla BB60 a BB74) dle etikety B. Boučka jde o orig. vyobrazený B. Boučkem jako text. fig. 17b. Ve skutečnosti uvedený kus je detailem holotypu. Číslo BB 60 použil B. Bouček pro text. fig. 16j a proto byl tento nevyobrazený jedinec přečíslován BB168
Corymbograptus retroflexus maximusBouček (1973), Pl. IX, fig. 3, text. fig. 17c BB62
Corymbograptus retroflexus maximus BB393
Corymbograptus retroflexus maximus BB383
Corymbograptus retroflexus maximus BB392
Corymbograptus retroflexus maximus BB407
Corymbograptus retroflexus maximus BB385
Corymbograptus retroflexus maximusBouček (1973), Pl. X, fig. 4 BB63
Corymbograptus retroflexus maximusBouček (1973), Pl. X, fig. 1, 2, 3, text. fig. 17a, b BB61
Corymbograptus retroflexus maximus BB405
Corymbograptus retroflexus maximus BB403
Corymbograptus retroflexus maximus BB390
Corymbograptus retroflexus retroflexus BB384
Corymbograptus retroflexus retroflexus BB312
Corymbograptus retroflexus retroflexusBouček (1973), Pl. IX, fig. 2, text. fig. 16f BB56
Corymbograptus retroflexus retroflexusBouček (1973), Pl. IX, fig. 1 BB58
Corymbograptus retroflexus retroflexus BB305
Corymbograptus retroflexus retroflexusBouček (1973), text. fig. 16g BB57
Corymbograptus retroflexus retroflexusBouček (1973), text. fig. 16c BB55
Corymbograptus retroflexus retroflexus BB309
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]