If it is, can anyone suggest where I can find some literature on it? There are heaps of these for sale in the internet, but I am not able to find a serious taxonomy as yet. The ones I have seen appear to be Phacops.
Barrandeops is a recognised genus within the Suborder Phacopina. Information on two species - Barrandeops granulops (Chatterton et al., 2006) and Barrandeops forteyi Chatterton and McKellar, 2009 - can be found in the publications listed below.
MCKELLAR, R. C. & CHATTERTON, B. D. E. 2009. Early and middle Devonian Phacopidae (Trilobita) of southern Morocco. Palaeontographica Canadiana, 28, 1-114.
CHATTERTON, B. D., FORTEY, R. A., BRETT, K. D., GIBB, S. L. & MCKELLAR, R. C. 2006. Trilobites from the upper Lower to Middle Devonian Timrhanrhart Formation, Jbel Gara el Zguilma, southern morocco. 25, 1-179.
Both Ryan McKellar and Brian Chatterton are active on ResearchGate, it might be worth getting in touch with them for more information.