Ronald L. Parsley
Tulane University
31 Papers
138 Citations
Ronald L. Parsley is an academic researcher from Tulane University. The author has contributed to research in topics: Kaili Formation & Ordovician. The author has an hindex of 14, co-authored 31 publications. Previous affiliations of Ronald L. Parsley include National Museum of Natural History.
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Papers
Are homalozoans echinoderms? An answer from the extraxial-axial theory
TL;DR: The Extraxial-Axial Theory (EAT) identifies body-wall homologies, common ontogenetic patterns, and major events in bodyplan evolution and strongly suggests that the bizarre asymmetry of homalozoans is a derived characteristic, and not indicative of plesiomorphic morphology for either chordates or echinoderms.
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Kaili Biota: A Taphonomic Window on Diversification of Metazoans from the Basal Middle Cambrian: Guizhou, China
Zhao Yuanlong,Zhu Maoyan (朱茂炎),Loren E. Babcock,Yuan Jinliang (袁金良),Ronald L. Parsley,Peng Jin,Yang Xinglian,Wang Yue +7 more
TL;DR: The Kaili Biota as mentioned in this paper, from the earliest Middle Cambrian of Guizhou, China, contains representatives of 110 metazoan genera belonging to 10 phyla.
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Towering sponges in an Early Cambrian Lagerstatte: Disparity between nonbilaterian and bilaterian epifaunal tierers at the Neoproterozoic-Cambrian transition
TL;DR: In this article, an Early Cambrian (Diandongian or probably Tommotian-Atdabanian) Lagerstatte from the Hetang Formation in Anhui Province, south China is reported, characterized by high-tiering sponges and small bilaterians.
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Cambrian echinoderm diversity and palaeobiogeography
Samuel Zamora,Bertrand Lefebvre,J. Javier Álvaro,Sébastien Clausen,Olaf Elicki,Oldrich Fatka,Peter A. Jell,Artem Kouchinsky,Jih-Pai Lin,Elise Nardin,Ronald L. Parsley,Sergei Rozhnov,James Sprinkle,Colin D. Sumrall,Daniel Vizcaïno,Andrew B. Smith +15 more
TL;DR: The distribution of all known Cambrian echinoderm taxa, encompassing both articulated specimens and taxonomically diagnostic isolated ossicles, is documented for the first time in this article.
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Long stalked eocrinoids in the basal middle cambrian kaili biota, taijiang county, guizhou province, china
Ronald L. Parsley,Yuanlong Zhao +1 more
TL;DR: Zhao et al. as mentioned in this paper described a complex ontogenetic development, which is described in terms of morphology of holdfast, number of thecal plate circlets, addition and morphology of theCal pores, ambulacral arrangement, and number of brachioles relative to thecal height.