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Serpulid-dominated shell beds from the Lower Bajocian (Middle Jurassic) of the Central High Atlas (Morocco) are primarily formed by quadrangular tubes of the serpulid polychaete Nogrobs moroccensis sp. nov. The transverse tube ornament consisting predominately of wrinkles, the lack of narrow spirals and the shortness or absence of attached posterior tube portion represent the diagnostic features of...
We describe four new fossil associations obtained from nine allochthonous blocks—the so-called Cipit boulders—on the basis of 23 thin sections. The samples were collected from the well-known Middle–Late Triassic St. Cassian Formation (NE Italy). These associations were determined by considering all biomorpha and microbialitic structures that were quantified and analyzed by performing Q-mode cluster...
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