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Proceratium Eocenicum
''Proceratium eocenicum'' is an extinct species of formicidae, formicid in the ant subfamily Proceratiinae known from fossils found in the Baltic region. History and classification ''P. eocenicum'' is known from two fossil specimens of adult males. The fossils were discovered preserved as Inclusion (mineral), inclusions in transparent chunks of Baltic amber. Baltic amber is approximately forty six million years old, having been deposited during Lutetian stage of the Middle Eocene. There is debate on what plant family the amber was produced by, with macrofossil and microflossil evidence suggesting a ''Pinus'' relative, while chemical and spectroscopic evidence suggests ''Agathis'' or ''Sciadopitys''. The paleoenvironment of the Eocene Baltic forests where the ''P. eocenicum'' lived was that of humid temperate to subtropical islands. The forests were composed of mostly ''Quercus'' and ''Pinus'' species, while the lower sections of the forests had paratropical plant elements, suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Eocene
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
