Bailiella Matthew 1885

• Main Authors: Unger, Tanja, Hildenbrand, Anne, Stinnesbeck, Wolfgang, Austermann, Gregor
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Trilobita; Ptychopariida; Conocoryphidae; Bailiella; Canada; Manuels River; Newfoundland
• Online Access: https://zenodo.org/record/7477286; https://doi.org/10.5281/zenodo.7477286

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. Published as part of 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, pp. 1051-1087 in Geodiversitas 44 (33) on page 1063, DOI:10.5252/geodiversitas2022v44a33, http://zenodo.org/record/7477657