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The axolotl (/ ˈ æ k s ə l ɒ t əl / ⓘ; from Classical Nahuatl: āxōlōtl [aːˈʃoːloːtɬ] ⓘ) (Ambystoma mexicanum) [3] is a paedomorphic salamander closely related to the tiger salamander. [3] [4] [5] It is unusual among amphibians in that it reaches adulthood without undergoing metamorphosis. Instead of taking to the land, adults ...
The axolotl has three pairs of external gills. This type of gill is most commonly observed on the aquatic larva of most species of salamanders, lungfish, and bichirs (which have only one large pair), and are retained by neotenic adult salamanders and some species of adult lungfish.
The axolotl is also a relative of the tiger salamander. [35] [36] Axolotls live in a paedomorphic state, retaining most characteristics of their larval stage for their entire lifespans. While they never metamorphose under natural conditions, metamorphosis can be induced in them, resulting in a form very similar to the plateau tiger salamander.
Polyphenism in Lepidoptera is commonly seen in the form of seasonal morphs, especially in the butterfly families of Nymphalidae and Pieridae. An Old World pierid butterfly, the common grass yellow ( Eurema hecabe ) has a darker summer adult morph, triggered by a long day exceeding 13 hours in duration, while the shorter diurnal period of 12 ...
Achoques are also compared to the axolotl and Taylor's salamander since all three species share a similar geographical location, taxonomic ranking, and have broadly similar morphological features. [4] [10] Compared to most Ambystoma species, their heads and rostrum are particularly flat. Additionally, their gills have a larger number of ...
The rare morph of a species may not fit the search image, and thus not be seen as prey. This gives the rare morphs an advantage, as it takes time for the predator to learn a new search image. [ 8 ] Search image shift require multiple encounters with the new form of prey, and since a rare morph is typically not encountered multiple times ...
Lake Xochimilco, in a detail from the 1847 Bruff/Disturnell map The Valley of Mexico at the time of the Spanish conquest, c. 1519. Lake Xochimilco (Spanish pronunciation: [sotʃiˈmilko]; Nahuatl languages: Xōchimīlco, pronounced [ʃoːtʃiˈmiːlko] listen ⓘ) is an ancient endorheic lake, located in the present-day Borough of Xochimilco in southern Mexico City.
Amphisbaenia / æ m f ɪ s ˈ b iː n i ə / (called amphisbaenians or worm lizards) is a group of typically legless lizards, [2] comprising over 200 extant species. Amphisbaenians are characterized by their long bodies, the reduction or loss of the limbs, and rudimentary eyes.