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Xiphophorus. Xiphophorus is a genus of euryhaline and freshwater fishes in the family Poeciliidae of order Cyprinodontiformes, native to Mexico and northern Central America. Xiphophorus species can be divided into 3 groups based on their evolutionary relationships: platyfish (or platies), northern swordtails, and southern swordtails.
X. pygmaeus. Binomial name. Xiphophorus pygmaeus. (Hubbs & Gordon, 1943) Xiphophorus pygmaeus, the pygmy swordtail, is a poeciliid fish from northeastern Mexico. It is the smallest of the swordtails. The male's sword is barely visible and the species is often called the swordless swordtail. It is sometimes kept in home aquaria, but is a rather ...
The Chiapas swordtail or upland swordtail ( Xiphophorus alvarezi) is a species of livebearing freshwater fish of family Poeciliidae, and genus Xiphophorus. It is, therefore, in the same genus as the common platy and the swordtail. The Chiapas swordtail was discovered and first described by Donn E. Rosen in 1960, along with four other species of ...
Baring teeth, growling and lunging are all signs of aggression in dogs. The same can be said for snarling, biting and ‘muzzle-punching’ other four-legged friends or humans.
Furthermore, dogs exhibit more favourably to long wagging tails and exhibit less aggressive behaviour. [12] The tail is commonly docked in almost one-third of all recognized domestic breed. Therefore, short tail dogs may experience more aggressive attacks than their long tail counterparts. [ 12 ]
Species: X. milleri. Binomial name. Xiphophorus milleri. D. E. Rosen, 1960. Xiphophorus milleri, the Catemaco platyfish, is a poeciliid fish endemic to Mexico's Lake Catemaco and its tributaries. As it has traits of both swordtails and platies, its discovery confirmed that these two groups should be consolidated into a single genus, Xiphophorus.
The Tibetan mastiff is often considered the most expensive dog since the breed has sold for up to millions of dollars. In 2014, a Tibetan mastiff puppy was reportedly sold for nearly $2 million in ...
D. E. Rosen, 1960. Xiphophorus cortezi, the delicate swordtail, is a species of poeciliid fish from Mexico. [2] Named after the Spanish conquistador Hernán Cortés, Xiphophorus cortezi was originally described in 1960 by Donn Eric Rosen as a subspecies of X. montezumae. It was well known in literature prior to the formal scientific description.
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