Sea Lilies in Spring: Crinoid Diversification during the Early Ordovician
نویسندگان
چکیده
The many Early Ordovician crinoid discoveries over the past 30 years signal a largely undocumented radiation. new diversity totals more than five times previous known list as of year 2000. Camerate, cladid, and disparid clades had emerged by second half Tremadocian Series, early during this time. Many key features such their distinctive arms standard cup plating originated end Ordovician, Floian Stage. These finds will provide data for character analysis in phylogenetic reconstructions, particularly those aimed at identifying branching within tree. crinoids were among earliest-known benthic invertebrates to exploit food resources high above substrate. Significantly, they also largest faunal elements A tentative listing distributions is provided; compendium subdivided into time slices with Laurentian global stratigraphic units.
منابع مشابه
Palaeogeographic implications of a new iocrinid crinoid (Disparida) from the Ordovician (Darriwillian) of Morocco
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ژورنال
عنوان ژورنال: Paleontological Journal
سال: 2021
ISSN: ['1555-6174', '0031-0301']
DOI: https://doi.org/10.1134/s0031030121090045