Allart P van Viersen, Alfer van Rossum, and Harald Prescher (2012)
New data on Astycoryphe, Dohmiella, Longiproetus and Quadratoproetus (Trilobita, Proetidae) from the Middle Devonian in the Ardennes, Belgium.
Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, vol. 264 p. 77-87.
21124, 194, 191, Lx, Ht, SYNDIN, CO, GI, PAL
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