Speciation of the genus Arthricocephalus Bergeron, 1899 (Trilobita) from the late early cambrian and its stratigraphic significance*

Autor:	Zhao Yuanlong, Yang Xinglian, Yuan Jinliang (袁金良)
Rok vydání:	2006
Předmět:	Paleontology biology Synonym (taxonomy) Arthricocephalus Genus Lineage (evolution) Arthricocephalites First appearance datum General Materials Science Biostratigraphy Subgenus biology.organism_classification Geology
Zdroj:	Progress in Natural Science. 16:614-623
ISSN:	1745-5391 1002-0071
DOI:	10.1080/10020070612330043
Popis:	The genus Arthricocephalus Bergeron, 1899 is revised , and Halipanktos Balker & Peel, 1997 is suggested here as a senior synonym. The subgenus Arthricocephalus (Arthricocephalites) Chien & Lin in Lu et al., as a separate genus. Of the 20 previously assigned species of Arthricocephalus (Arthricocephalus) Bergeron, 1899, Arthricocephalus (Arthricocephalites) Chien & Lin in Lu et al , 1974, Arthricocephalus (Euarthricocephalus) Ju, 1983 are lumped into eight species. The speciation trend of Arthricocephalus and Arthricocephalites is demonstrated based on their stratigraphic occurrences. It not only enhances the resolution of the biostatigraphic zonation in the uppermost Lower Cambrian, but also represents a potential candidate to define the Duyunian stage. The base of the stage is suggested at the first appearance datum (FAD) of Arthricocephalus chauveaui Bergeron, 1899 within the evolutionary lineage from Ar. jiangkouensis Yin in Yin & Li, 1978 to Ar. chauveaui in the global scale. Supported by Nat...
Databáze:	OpenAIRE
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