Revision of the oryctocephalid trilobite generaArthricocephalusBergeron andOryctocarellaTomashpolskaya and Karpinski (Cambrian) from South China and Siberia
| Autor: | Loren E. Babcock, Qianping Lei, Xuejian Zhu, Tao Dai, Shanchi Peng |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Journal of Paleontology. 91:933-959 |
| ISSN: | 1937-2337 0022-3360 |
| DOI: | 10.1017/jpa.2017.44 |
| Popis: | Restudy of the limestone slab containing the type suite ofArthricocephalus chauveauiBergeron, 1899 (Trilobita), the type species ofArthricocephalusBergeron, 1899, shows that specimens of three species, each representing a separate genus, are present on the slab and were likely included in the original concept of the species. BesidesA.chauveaui, the slab contains specimens ofOryctocarella duyunensis(Qian, 1961) andDuyunaspis duyunensisZhang and Qian in Zhou et al., 1977. Bergeron (1899) illustrated one exoskeleton from the type suite ofA.chauveauionly and apparently based much of his written description on that specimen. This specimen was clearly intended to be the type specimen ofA.chauveaui. Subsequently, Lane et al. (1988) designated another specimen, which was not originally illustrated, as the lectotype, and this specimen is referable toOryctocarella duyunensis. As revised here, Bergeron’s illustrated specimen should be regarded as the lectotype ofA.chauveaui. Such designation stabilizes the concepts of bothArthricocephalusandA.chauveaui.ArthricocephalitesQian in Lu et al., 1974 andHaliplanktosBlaker and Peel, 1997 are regarded as junior synonyms ofArthricocephalus.OryctocarellaTomashpolskaya and Karpinski, 1961, which was previously regarded as a junior synonym ofArthricocephalus, is revived as a valid genus.Oryctocarellaincludes a number of species previously assigned toArthricocephalus. The type species of bothArthricocephalusandOryctocarella, together with related species, are described on the basis of new material. |
| Databáze: | OpenAIRE |
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