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Acila Castrensis
''Acila'' is a genus of marine Bivalvia, bivalves in the family Nuculidae. ''Acila'' fossils have been found dating back to 113.0 Mega-annum, Ma ago. Species As of March, 2021, the genus contains the following species: *''Acila castrensis'' Hinds, 1843 *''Acila divaricata'' Hinds, 1843 *''Acila fultoni'' E. A. Smith, 1892 *''Acila granulata'' E. A. Smith, 1906 *''Acila insignis'' Gould, 1861 *''Acila jucunda'' Thiele, 1931 *''Acila minutoides'' Kuroda & Habe in Habe, 1958 *''Acila mirabilis'' A. Adams & Reeve, 1850 *''Acila vigilia'' Schenck, 1936 References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albian
The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0.9 Ma (million years ago). The Albian is preceded by the Aptian and followed by the Cenomanian. Stratigraphic definitions The Albian Stage was first proposed in 1842 by Alcide d'Orbigny. It was named after Alba, the Latin name for River Aube in France. A Global Boundary Stratotype Section and Point (GSSP), ratified by the IUGS in 2016, defines the base of the Albian as the first occurrence of the planktonic foraminiferan '' Microhedbergella renilaevis'' at the Col de Pré-Guittard section, Arnayon, Drôme, France. The top of the Albian Stage (the base of the Cenomanian Stage and Upper Cretaceous Series) is defined as the place where the foram species '' Rotalipora globotruncanoides'' first appears in the stratigraphic column. The Albia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |