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Abstract: Re‐examination of newly collected topotype material confirms that the type species of Yangtzeella, Y. poloi, a widespread Early and Mid Ordovician syntrophiidine brachiopod in South China, has a finely costellate shell rather than being smooth as previously thought. Thus, the subgenus Yangtzeella (Vadimella) Nikitina etal., established on the basis of fine costellae, is invalidated. Among...
Epitomyonia is characterized by various types of dorsal ridges, which may be transverse, longitudinal, or highly convoluted and probably served as skeletal supports for lophophores of various complexity. Multivariate analyses suggest that the Epitomyonia-bearing brachiopod associations lived in relatively shallow-water environment in the Late Ordovician, and inhabited mainly deep-water environments...
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