Bailiaspis

See text Bailiaspis Resser, 1936,[1] 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).

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'.

[2][3] Type species: Conocephalites elegans Hartt in Dawson, 1868, by original designation.

other species 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:[29] Cladistic analyses of the Conocoryphidae by Cotton (2000, p. 193)[31] 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.

Bailiaspis dalmani (Angelin, 1854), basal Whitesands Bay Formation, Porth-y-rhaw; cast of external mould of cephalon and incomplete thorax figured Salter & Hicks (1869, pl. 2, fig 8) as holotype of Conocoryphe bufo Hicks, and Lake (1940, pl. 40, figs 15, 16) as B. dalmani . Scale bar represents 5 mm.