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Psenes Macrolepis
''Psenes'' is a genus of driftfishes native to the Indian Ocean, Indian, Atlantic and Pacific oceans. Species There are currently six recognized species in this genus: * ''Psenes arafurensis'' Albert Günther, Günther, 1889 (Banded driftfish) * ''Psenes cyanophrys'' Achille Valenciennes, Valenciennes, 1833 (Freckled driftfish) * ''Psenes hillii'' James Douglas Ogilby, Ogilby, 1915 * ''Psenes maculatus'' Christian Frederik Lütken, Lütken, 1880 (Silver driftfish) * ''Psenes pellucidus'' Christian Frederik Lütken, Lütken, 1880 (Bluefin driftfish) * ''Psenes sio'' Richard Lee Haedrich, Haedrich, 1970 (Twospine driftfish) References Nomeidae Extant Rupelian first appearances Rupelian genus first appearances Taxa named by Achille Valenciennes {{Scombroidei-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene
The Oligocene ( ) is a geologic epoch (geology), epoch of the Paleogene Geologic time scale, Period that extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from Ancient Greek (''olígos'') 'few' and (''kainós'') 'new', and refers to the sparsity of Neontology, extant forms of Mollusca, molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and final epoch of the Paleogene Period. The Oligocene is often considered an important time of transition, a link between the archaic world of the tropical Eocene and the more modern ecosystems of the Miocene. Major chang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
