Allart P Van Viersen and Harald Prescher (2007)
Note on Cyphaspis Burmeister,1843 (Trilobita,Aulacopleuridae),with a review of several species mainly from the Devonian of Belgium and Germany.
Senckenbergiana Lethaea, vol. 87 p. 157-170.
16321, 194, Lx, SYNDIN, CO, PAL
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