Bailiaspis

Bailiaspis Resser, 1936, is a Middle Cambrian (Miaolingian) trilobite genus belonging to the Family Conocoryphidae Angelin, 1854. Within the Acado-Baltic region, the genus ranges from Wuliuan into Guzhangian age strata ("Ptychagnostus gibbus" to "Lejopyge laevigata" Biozones in terms of Scandinavian biostratigraphic terminology).
Diagnosis.
A genus of Conocoryphidae in which backward expansion of the anterior cranidial border and the border furrow arched sharply towards posterior (sag) combine to form a distinct medial 'plectrum'.
Species.
Type species: "Conocephalites elegans" Hartt "in" Dawson, 1868, by original designation. From the Middle Cambrian, Chamberlain's Brook Formation (Fossil Brook Member), "Eccaparadoxides eteminicus" Zone, of Saint John, New Brunswick.
other species
Notes.
Other species previously assigned to "Bailiaspis" and listed below have more recently been transferred by Kim "et al". (2002, p. 830) to "Bailiella" Matthew, 1885:
Cladistic analyses of the Conocoryphidae by Cotton (2000, p. 193) gave strong evidence that "Bailiaspis glabrata" (Angelin, 1854) should also be assigned to the genus "Bailiella", as tentatively suggested by Sdzuy (1966), although subsequent authors (e.g. Kim "et al"., 2002) have for now preferred to retain the species in "Bailiaspis".