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Iterative progenesis in Upper Cretaceous ammonites
Paleobiology, 1989Pteroscaphites are small, rare species of scaphitid ammonites from the Upper Cretaceous (Turonian-Santonian) of the Western Interior of North America. Their evolution appears to parallel that of the larger species of Scaphites or Clioscaphites , with ...
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Upper Cretaceous flora of Slovenia:
1999O najdbah rastlinskih fosilov v ploščatih in laminiranih zgornjekrednih apnencih Tržaško-komenske planote je bilo doslej malo znanega. Kljub razmeromaštevilnim primerkom iz Komenskega apnenca, ki jih že desetletja hranita Prirodoslovni muzej Slovenije v Ljubljani in Museo Civico di Storia Naturale v Trstu, so rastlinski fosili v geološki literaturi ...
Dobruskina, Inna A. +2 more
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The First Record of an Ammonite in the Upper Cenomanian (Upper Cretaceous) of the Crimea
Moscow University Geology BulletinCenomanian ammonoid Calycoceras (Calycoceras) naviculare (Mantell, 1822) (Acanthoceratidae, Ammonoidea) was found in the well-known section of Selbukhra Mountain in the vicinity of Nauchnyi Town of southwestern Crimea. This is the first find of the ammonoid in the upper Cenomanian deposits in the Crimea and in Russia.
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Upper Cretaceous Bolivinoides Guide Forms
Micropaleontology, 1958"The development of the series Bolivinoides strigillata- decorata-australis-gigantea in the upper Cretaceous of Belgium is followed. In a nearly continuous sequence of formations, the group is found to increase the number of pustules on the last-formed sutures from two to nine. This continuous increase can be used as a stratigraphic tool in working out
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