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Temperate Bass
The Moronidae are a family of perciform fishes, commonly called the temperate basses, consisting of at least six freshwater, brackish water, and marine species. Many members of this family are anadromous. Description These fishes reach 45 cm to one meter long and silvery in colour, with seven or eight longitudinal stripes on the flanks. The body is moderately elongated, and somewhat flattened on the sides. The head and body are covered with large comb scales. They have two short spines on the gill cover. The gill cover is round and slightly sawn. The mouth is large, the maxillary is extended, and there is no supramaxillary. There are rows of small, conical teeth in the mouth. Special fangs are missing. The base of the tongue is also provided with two rows of small teeth, and there are teeth on the skull (vomer) and the palatine bone (palatine). The number of branchiostegal rays is seven. Of a total of 25 vertebrae, 12 are trunk vertebrae and 13 are tail vertebrae located behind the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), 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 Carbon-13, 13C in the atmosphere was exceptionally low in comparison with the more common isotope Carbon-12, 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 Popigai impact structure, Siberia and in what is now ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
