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These lakes were drained by Spanish settlers after the conquest of the Aztec Empire, leading to the destruction of much of the axolotl's natural habitat. As of 2020, the axolotl was near extinction [6] [7] due to urbanization in Mexico City and consequent water pollution, as well as the introduction of invasive species such as tilapia and perch
The surface and cave forms of the Mexican tetra have proven powerful subjects for scientists studying evolution. [28] When the surface-dwelling ancestors of current cave populations entered the subterranean environment, the change in ecological conditions rendered their phenotype—which included many biological functions dependent on the presence of light—subject to natural selection and ...
The Aztec chub or Aztec shiner, [1] (Aztecula sallaei) is a species of freshwater ray-finned fish in the family Leuciscidae, the shiners, daces and minnows. [2] This species is endemic to Mexico . [ 3 ]
In Late Devonian vertebrate speciation, descendants of pelagic lobe-finned fish such as Eusthenopteron exhibited a sequence of adaptations: Panderichthys, suited to muddy shallows; Tiktaalik with limb-like fins that could take it onto land; early tetrapods in weed-filled swamps, such as Acanthostega, which had feet with eight digits, and Ichthyostega, which had limbs.
Hyalella azteca is found across Central America, the Caribbean and North America, [2] as far north as the Arctic tree line. [1] It lives among vegetation and sediments in permanent bodies of freshwater, including lakes and rivers, [1] extending into tidal fresh water, and freshwater barrier lagoons. [2]
A fish with limb-like fins that could take it onto land. [75] It is an example from several lines of ancient sarcopterygian fish developing adaptations to the oxygen-poor shallow-water habitats of its time, which led to the evolution of tetrapods. [61]
The new home will be the 14th house Tres Rios Habitat for Humanity has constructed in San Juan ... the organization is moving ahead with plans to construct a house in Aztec for a family of three ...
The word Coelacanth is an adaptation of the Modern Latin Cœlacanthus ('hollow spine'), from the Ancient Greek κοῖλ-ος (koilos, 'hollow') and ἄκανθ-α (akantha, 'spine'), [12] referring to the hollow caudal fin rays of the first fossil specimen described and named by Louis Agassiz in 1839, belonging to the genus Coelacanthus. [8]