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Eocrinoidea (Eocrinoids)

      The Eocrinoidea are an extinct class of echinoderms that lived between the Early Cambrian and Late Silurian periods. They are the earliest known group of stalked, arm-bearing echinoderms, and were the most common echinoderms during the Cambrian.The eocrinoids were a paraphyletic group that may have been ancestral to six other classes: Rhombifera, Diploporita, Coronoidea, Blastoidea, Parablastoidea, and Paracrinoidea. The earliest genera had a short holdfast and irregularly structured plates. Later forms had a fully developed stalk with regular rows of plates. They were benthic suspension feeders, with five ambulacra on the upper surface, surrounding the mouth and extending into a number of narrow arms. An unusual Ordovician form was the conical Bolboporites with its single brachiole.

Source: http://en.wikipedia.org/wiki/Eocrinoidea
Acadocrinus nuntium VK355
Acadocrinus nuntiusFatka a Kordule (1986), Pl. 1, fig. 3 VK356
AcadocrinusFatka a Kordule (1986), Pl. 2, fig. 2 YA1195
AcadocrinusFatka a Kordule (1986), Pl. 1, fig. 3 YA1193
AcadocrinusAD, Fatka a Kordule (1986), diskutovaný YA1197
AcadocrinusAD, Fatka a Kordule (1986): nevyobrazený, ale diskutovaný kus YA1196
AcadocrinusFatka a Kordule (1986), Pl. 1, fig. 1 YA1191
Acadocrinus OZ137
Acadocrinus VK378
Acanthocystites briareus p5054
Acanthocystites briareus VK434
Acanthocystites OZ130
Akadocrinus jani Prokop, 1962 OZ125
Akadocrinus jani Prokop, 1962 OZ127
Akadocrinus jani Prokop, 1962 RP55
Akadocrinus jani Prokop, 1962 OZ126
Akadocrinus jani Prokop, 1962 OZ124
Akadocrinus nuntius RP54
Akadocrinus CW45
Akadocrinus CW43
Eocrinoidea
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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]