On the basis of new material from the Armorican massif, France, two new species of trilobites are described--Dechenella (Basidechenella) rogeri from Devonian deposits and Phacopidella (Denckmannites) aff. volborthi from Gotlandian (Silurian) deposits. The same material has also provided additional data on the species D. (B.) andegavensis and Cryphina andegavensis, and on the characteristics of the whole genus Cryphina of the Asteropyginae.

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