On the trilobite family Staurocephalidae
Zofia Kielan
The ventral cephalic sutures of the genus Staurocephalus Barrande, 1846, are described and are shown to be euptychopariid type, the rostral plate being extremely large. The origin of this structure in Staurocephalus is discussed. The similarities between Staurocephalus and Oedicybele Whittington, 1938, are pointed out and the two genera are taken to constitute a separate family - the Staurocephalidae. Staurocephalus clavifrons Angelin, Staurocephalus sp. n., Staurocephalus sp. b, Staurocephalus sp. c, and Oedicybele kingi Whittington are described.
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