Bailiella Matthew, 1885

Unger, Tanja, Hildenbrand, Anne, Stinnesbeck, Wolfgang & Austermann, Gregor, 2022, Biostratigraphy and taxonomy of polymerid trilobites of the Manuels River Formation (Drumian, middle Cambrian), Newfoundland, Canada, Geodiversitas 44 (33), pp. 1051-1087 : 1063

Genus Bailiella Matthew, 1885

Bailiella Matthew, 1885: 124 . —

Type species: Conocephalites baileyi Hartt in Dawson, 1868, designated by Miller (1889).

Tangshiella Hupé, 1953: 194. —

Type species: Bailiella ulrichi Resser & Endo, 1937 , by original designation ( Hupé 1953).

DIAGNOSIS. — Cephalon semicircular; fixed cheeks continuous in front of glabella; border furrow extends around cranidium; surface ornamented (based on Resser 1936; Lake 1940, with modifications).

REMARKS

Hupé (1953) introduced the genus Tangshiella without providing a description or discussion. The type species is Bailiella ulrichi Resser & Endo, 1937 . The diagnosis of B. ulrichi matches that of the genus Bailiella ; therefore, the genus Tangshiella is here considered to be a synonym of Bailiella . The genus is closely related to Conocoryphe Hawle & Corda, 1847 , but differs in having a longer preglabellar area and the absence of furrows ( Resser 1936). The taxonomic distinction from Bailiaspis Resser, 1936 , is less distinct and presently unsolved ( Resser 1936; Álvaro & Vizcaïno 2018). Kim et al. (2002) regarded the genus Bailiella as paraphyletic and did not provide a diagnosis. Clearly, the genus requires revision. Bailiella is here treated as genus separated from related genera.