ABSTRACT
Recent study of organophosphatic (lingulate) brachiopods from the Silurian and Devonian strata of Barrandium, Central Bohemia, brought evidence that the orders Siphonotretida and Paterinida and the family Dysoristidae did not become extinct before the end of the Ordovician. Rare, imperfectly preserved but undoubted material of Siphonotretida is now known from the Wenlock, Ludlow and Emsian, fragments of a paterinid are known from the Llandovery, and characteristic dysoristid shells have been found in the upper Pragian. The stratigraphical range of the family Paterulidae is extended into the early Eifelian.
