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Prochnygraptus gen.n. (Graptolithina, Monograptidae) from the middle and upper Llandovery of Europe Alois Pribyl & Petr Storch Vestnik Ustredniho ustavu geologickeho 1985, 60, 3, 159-164
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ABSTRACT:
"Prochnygraptus gen.n. was established on the species Monograptus singularis Törnquist, 1892 and its occurence ranges within the biozones of the middle and upper Llandovery of Europe. The type species together with Prochnygraptus crispus (Lapworth, 1876) and P. germanicus sp.n. form an idependent line of evolution of monograptids, perhaps derived from the middle Llandovery species of the group Monograptus knockensis."
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