FORM AND FORMATION OF FLARES AND PARABOLAE BASED ON NEW OBSERVATIONS OF THE INTERNAL SHELL STRUCTURE IN LYTOCERATID AND PERISPHINCTID AMMONOIDS

Form and formation of flares and parabolae based on new observations of the internal shell structure in lytoceratid and perisphinctid ammonoids

The ultrastructure of pristine shells of Jurassic and Cretaceous lytoceratid and perisphinctid ammonoids indicates that flares and parabolae represent homologous structures.Both mark an interruption of shell growth.We dismiss earlier interpretations of parabolae as actual aperture, relics of resorbed apophyses or superstructure of the musculature a

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Y Stent Rendezvous to Treat Symptomatic Innominate Artery Stenosis

A male in his 60s presented with transient ischemic attacks 5 years after aortic arch branch graft repair for type A aortic dissection.Computed tomographic angiography demonstrated 80% stenosis yn rating badge of the brachiocephalic artery close to the origins of the right common carotid and subclavian arteries.The case was reviewed at our multidis

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