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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.
Heckel, 1848. The green swordtail (Xiphophorus hellerii) is a species of freshwater / brackish fish in family Poeciliidae of order Cyprinodontiformes. [2] A live-bearer, it is closely related to the southern platyfish or 'platy' (X. maculatus) and can crossbreed with it. It is native to an area of North and Central America stretching from ...
Polyandry in fishes is a mating system where females mate with multiple males within one mating season. [1] This type of mating exists in a variety of animal species. [1] Polyandry has been found in both oviparous and viviparous bony fishes and sharks. [2] General examples of polyandry occur in fish species, such as green swordtails [1] and ...
C. riisei. Binomial name. Corynopoma riisei. T. N. Gill, 1858. Corynopoma riisei, also known as the sword-tail characin, is a species of characin found in Colombia, Trinidad and Tobago and Venezuela. [ 2] It is also kept as an aquarium fish. This species is the only member of the genus Corynopoma. [ 3]
Xiphophorus montezumae. D. S. Jordan & Snyder, 1899. Xiphophorus montezumae, the Montezuma swordtail, is a livebearing freshwater fish of the order Cyprinodontiformes, family Poeciliidae, and genus Xiphophorus. [2] It is in the same genus as the common platy and the swordtail. Xiphophorus means 'sword-bearer' in Greek.
The body of Xiphophorus nigrensis is larger and deeper than that of X. pygmaeus. The males possess on their caudal fin a moderately to well-developed sword set off by a black line, from which the specific epithet nigrensis (niger meaning black and ensis sword in Latin) is derived. Pregnant females exhibit a dusky gravid spot on their bellies.
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.
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 ...