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Re-discovery of the holotype of “Micropeltis” isseli Airaghi, 1901, in the collection of the Museo di Paleontologia (University of Genova), allowed for a re-assessment of its morphological features and revision of its systematic placement. The discovery of ambulacral plate compounding that is compatible with that of phymosomatids, in combination with its pore arrangement and tuberculation pattern,...
The study of well-preserved Pliocene and Pleistocene Spatangus from Emilia is used to analyze the morphological variations of Mediterranean populations, to depict the relationship between fasciole shape and other morphological characteristics and to describe previously unpublished pedicellar valves. These new data allow to be two species distinguished: Spatangus purpureus (Muller) and S. subinermis...
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