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Notophthalmus meridionalis, the black-spotted newt or Texas newt, is a species of aquatic newt native to northeastern Mexico and southern Texas in the United States. [1] [2] This amphibian was put on the IUCN Red List of Endangered Species in 2008 with populations still decreasing. It was reclassified to Vulnerable in 2022. [1]
Eastern newts have a lifespan of about 8–10 years in the wild, but some individuals have been known to live up to 15 years. [6] Eastern newts have three stages of life: (1) the aquatic larva or tadpole, (2) the red eft or terrestrial juvenile stage, and (3) the aquatic adult.
The diverse geography of Texas, the second-largest state, hosts a variety of habitats for amphibians, including swamps and the Piney Woods in the east, rocky hills and limestone karst in the central Hill Country of the Edwards Plateau, desert in the south and west, mountains in the far west (the Trans-Pecos), and grassland prairie in the north ...
A single newt female can produce hundreds of eggs. For instance, the warty newt can produce 200–300 eggs (Bradford 2017). After courtship rituals of varying complexity, which take place in ponds or slow-moving streams, the male newt transfers a spermatophore, which is taken up by the female. Fertilized eggs are laid singly and are usually ...
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The striped newt (Notophthalmus perstriatus) is a species of aquatic salamander native to the southeastern United States.It is a close relative of the eastern newt, with which it shares territory, and can be distinguished from the latter by the presence of red stripes running down the sides of its back and red spots on its back that lack a black outline.
In William Shakespeare's play Macbeth, the witches use "eye of newt" as the first ingredient added to their cauldron. [12] Newts rarely appear in literature, but Roald Dahl included one crucial to the story as a practical joke on the malevolent Miss Trunchbull, in his novel Matilda. [13]
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 ...