Links
Palaeoscolecida
Whittard W. F. (1953): Palaeoscolex piscatorum gen. et sp. nov., a worm from the Tremadocian of Shropshire
Quarterly Journal of the Geological Society, 109, 125-135 Kraft P., Mergl M. (1989): Worm-like fossils (Palaeoscolecida; ?Chaetognatha) from the Lower Ordovician of Bohemia
Sbor. geol. věd, Paleontologie 30